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version 1.16, 2002/08/06 17:38:26
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version 1.122.2.2, 2013/12/30 14:05:21
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| # The LearningOnline Network with CAPA |
# The LearningOnline Network with CAPA |
| # (Publication Handler |
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| # |
# |
| # $Id$ |
# $Id$ |
| # |
# |
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| # http://www.lon-capa.org/ |
# http://www.lon-capa.org/ |
| # |
# |
| # (Navigate problems for statistical reports |
# (Navigate problems for statistical reports |
| # YEAR=2001 |
|
| # 5/5,7/9,7/25/1,8/11,9/13,9/26,10/5,10/9,10/22,10/26 Behrouz Minaei |
|
| # 11/1,11/4,11/16,12/14,12/16,12/18,12/20,12/31 Behrouz Minaei |
|
| # YEAR=2002 |
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| # 1/22,2/1,2/6,2/25,3/2,3/6,3/17,3/21,3/22,3/26,4/7,5/6 Behrouz Minaei |
|
| # 5/12,5/14,5/15,5/19,5/26,7/16,7/25,7/29,8/5 Behrouz Minaei |
|
| # |
# |
| ### |
############################################### |
| |
############################################### |
| |
|
| package Apache::lonproblemstatistics; |
=pod |
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|
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=head1 NAME |
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lonproblemstatistics |
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|
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=head1 SYNOPSIS |
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|
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Routines to present problem statistics to instructors via tables, |
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Excel files, and plots. |
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|
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=over 4 |
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=cut |
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|
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############################################### |
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############################################### |
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package Apache::lonproblemstatistics; |
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|
| use strict; |
use strict; |
| use Apache::lonnet(); |
use Apache::lonnet; |
| |
use Apache::loncommon(); |
| use Apache::lonhtmlcommon; |
use Apache::lonhtmlcommon; |
| use Apache::loncoursedata; |
use Apache::loncoursedata; |
| use GDBM_File; |
use Apache::lonstatistics; |
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use LONCAPA::lonmetadata(); |
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use Apache::lonlocal; |
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use Spreadsheet::WriteExcel; |
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use Apache::lonstathelpers(); |
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use Time::HiRes; |
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use LONCAPA; |
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|
| |
|
| sub BuildProblemStatisticsPage { |
my @StatsArray; |
| my ($cacheDB, $students, $courseID, $c, $r)=@_; |
my %SeqStat; # keys are symbs, values are hash refs |
| my %cache; |
|
| |
|
| unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER,0640)) { |
## |
| return '<html><body>Unable to tie database.</body></html>'; |
## Localization notes: |
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## |
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## in @Fields[0]->{'long_title'} is placed in Excel files and is used as the |
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## header for plots created with Graph.pm, both of which more than likely do |
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## not support localization. |
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## |
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## Additional Notes: |
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## Localization can be done and is done before passing the phrases |
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## to the output. |
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## This might conflict with special characters, e.g. German Umlaute or |
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## chinese characters. Do not use such characters in this case. |
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## If this failed, consider that the sequence and folder names |
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## are also passed to the output and would fail the same way. |
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## |
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# |
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# |
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## |
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## Description of Field attributes |
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## |
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## Attribute Required Value Meaning or Use |
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## |
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## name yes any scalar Used to uniquely identify field |
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## title yes any scalar This is what the user sees to identify |
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## the field. Passed through &mt(). |
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## long_title yes any scalar Used as graph heading and in excel |
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## output. Passed through &mt(). |
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## align no (left|right|center) HTML cell contents alignment |
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## color yes html color HTML cell background color |
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## used to visually group statistics |
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## special no (link) Indicates a link, target is name.link |
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## Currently set in &get_statistics() |
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## graphable no (yes|no) Can a bar graph of the field be |
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## produced? |
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## sortable no (yes|no) Should a sort link be put in the |
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## column header? |
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## selectable yes (yes|no) Can the column be removed from the |
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## statistics display? |
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## selected yes (yes|no) Is the column selected by default? |
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## |
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## format no sprintf format string |
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## |
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## excel_format no excel format type |
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## (see &Apache::loncommon::define_excel_formats |
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my @Fields = ( |
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{ name => 'problem_num', |
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title => 'P#', |
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align => 'right', |
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color => '#FFFFE6', |
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selectable => 'no', |
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defaultselected => 'yes', |
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}, |
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{ name => 'container', |
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title => 'Sequence or Folder', |
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align => 'left', |
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color => '#FFFFE6', |
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sortable => 'yes', |
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selectable => 'no', |
| |
defaultselected => 'yes', |
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}, |
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{ name => 'title', |
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title => 'Title', |
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align => 'left', |
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color => '#FFFFE6', |
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special => 'link', |
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sortable => 'yes', |
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selectable => 'no', |
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defaultselected => 'yes', |
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}, |
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{ name => 'part', |
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title => 'Part', |
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align => 'left', |
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color => '#FFFFE6', |
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selectable => 'no', |
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defaultselected => 'yes', |
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}, |
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{ name => 'num_students', |
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title => '#Stdnts', |
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align => 'right', |
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color => '#EEFFCC', |
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format => '%d', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Number of Students Attempting Problem', |
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selectable => 'yes', |
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defaultselected => 'yes', |
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}, |
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{ name => 'tries', |
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title => 'Tries', |
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align => 'right', |
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color => '#EEFFCC', |
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format => '%d', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Total Number of Tries', |
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selectable => 'yes', |
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defaultselected => 'yes', |
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}, |
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{ name => 'max_tries', |
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title => 'Max Tries', |
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align => 'right', |
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color => '#DDFFFF', |
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format => '%d', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Maximum Number of Tries', |
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selectable => 'yes', |
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defaultselected => 'yes', |
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}, |
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{ name => 'min_tries', |
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title => 'Min Tries', |
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align => 'right', |
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color => '#DDFFFF', |
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format => '%d', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Minumum Number of Tries', |
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selectable => 'yes', |
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defaultselected => 'yes', |
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}, |
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{ name => 'mean_tries', |
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title => 'Mean Tries', |
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align => 'right', |
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color => '#DDFFFF', |
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format => '%5.2f', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Average Number of Tries', |
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selectable => 'yes', |
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defaultselected => 'yes', |
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}, |
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{ name => 'std_tries', |
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title => 'S.D. tries', |
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align => 'right', |
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color => '#DDFFFF', |
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format => '%5.2f', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Standard Deviation of Number of Tries', |
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selectable => 'yes', |
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defaultselected => 'yes', |
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}, |
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{ name => 'skew_tries', |
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title => 'Skew Tries', |
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align => 'right', |
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color => '#DDFFFF', |
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format => '%5.2f', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Skew of Number of Tries', |
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selectable => 'yes', |
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defaultselected => 'no', |
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}, |
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{ name => 'num_solved', |
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title => '#YES', |
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align => 'right', |
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color => '#FFDDDD', |
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format => '%4.1f',# format => '%d', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Number of Students able to Solve', |
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selectable => 'yes', |
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defaultselected => 'yes', |
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}, |
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{ name => 'num_override', |
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title => '#yes', |
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align => 'right', |
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color => '#FFDDDD', |
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format => '%4.1f',# format => '%d', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Number of Students given Override', |
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selectable => 'yes', |
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defaultselected => 'yes', |
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}, |
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{ name => 'tries_per_correct', |
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title => 'tries/correct', |
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align => 'right', |
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color => '#FFDDDD', |
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format => '%4.1f', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Tries per Correct Answer', |
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selectable => 'yes', |
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defaultselected => 'yes', |
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}, |
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{ name => 'num_wrong', |
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title => '#Wrng', |
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align => 'right', |
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color => '#FFDDDD', |
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format => '%4.1f', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Number of students whose final answer is wrong', |
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selectable => 'yes', |
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defaultselected => 'yes', |
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}, |
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{ name => 'per_wrong', |
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title => '%Wrng', |
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align => 'right', |
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color => '#FFDDDD', |
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format => '%4.1f', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Percent of students whose final answer is wrong', |
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selectable => 'yes', |
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defaultselected => 'yes', |
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}, |
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{ name => 'deg_of_diff', |
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title => 'DoDiff', |
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align => 'right', |
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color => '#FFFFE6', |
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format => '%5.2f', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Degree of Difficulty'. |
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' ~[ 1 - ((#YES+#yes) / Tries) ~]', |
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selectable => 'yes', |
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defaultselected => 'yes', |
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}, |
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{ name => 'deg_of_disc', |
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title => 'DoDisc', |
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align => 'right', |
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color => '#FFFFE6', |
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format => '%4.2f', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Degree of Discrimination', |
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selectable => 'yes', |
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defaultselected => 'yes', |
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}, |
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## duedate included for research purposes. Commented out most of the time. |
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# { name => 'duedate', |
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# title => 'Due Date', |
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# align => 'left', |
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# color => '#FFFFFF', |
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# sortable => 'yes', |
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# graphable => 'no', |
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# long_title => 'Due date of resource for instructor', |
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# selectable => 'no', |
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# defaultselected => 'yes', |
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# }, |
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## opendate included for research purposes. Commented out most of the time. |
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# { name => 'opendate', |
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# title => 'Open Date', |
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# align => 'left', |
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# color => '#FFFFFF', |
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# sortable => 'yes', |
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# graphable => 'no', |
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# long_title => 'date resource became answerable', |
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# selectable => 'no', |
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# defaultselected => 'yes', |
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# }, |
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## symb included for research purposes. Commented out most of the time. |
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# { name => 'symb', |
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# title => 'Symb', |
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# align => 'left', |
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# color => '#FFFFFF', |
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# sortable => 'yes', |
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# graphable => 'no', |
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# long_title => 'Unique LON-CAPA identifier for problem', |
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# selectable => 'no', |
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# defaultselected => 'yes', |
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# }, |
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## resptypes included for research purposes. Commented out most of the time. |
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# { name => 'resptypes', |
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# title => 'Response Types', |
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# align => 'left', |
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# color => '#FFFFFF', |
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# sortable => 'no', |
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# graphable => 'no', |
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# long_title => 'Response Types used in this problem', |
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# selectable => 'no', |
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# defaultselected => 'yes', |
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# }, |
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## maxtries included for research purposes. Commented out most of the time. |
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# { name => 'maxtries', |
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# title => 'Maxtries', |
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# align => 'left', |
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# color => '#FFFFFF', |
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# sortable => 'no', |
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# graphable => 'no', |
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# long_title => 'Maximum number of tries', |
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# selectable => 'no', |
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# defaultselected => 'yes', |
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# }, |
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## hinttries included for research purposes. Commented out most of the time. |
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# { name => 'hinttries', |
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# title => 'hinttries', |
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# align => 'left', |
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# color => '#FFFFFF', |
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# sortable => 'no', |
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# graphable => 'no', |
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# long_title => 'Number of tries before a hint appears', |
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# selectable => 'no', |
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# defaultselected => 'yes', |
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# }, |
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# |
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## problem weight for instructor |
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{ name => 'weight', |
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title => 'weight', |
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align => 'right', |
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color => '#FFFFFF', |
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sortable => 'no', |
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graphable => 'no', |
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long_title => 'Problem weight (for instructor)', |
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selectable => 'yes', |
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defaultselected => 'yes', |
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}, |
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); |
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|
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my @SeqFields = ( |
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{ name => 'title', |
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title => 'Sequence', |
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align => 'left', |
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color => '#FFFFE6', |
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special => 'no', |
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sortable => 'no', |
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selectable => 'yes', |
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defaultselected => 'no', |
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}, |
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{ name => 'items', |
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title => '#Items', |
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align => 'right', |
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color => '#FFFFE6', |
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format => '%4d', |
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sortable => 'no', |
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graphable => 'no', |
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long_title => 'Number of Items in Sequence', |
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selectable => 'yes', |
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defaultselected => 'no', |
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}, |
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{ name => 'scoremean', |
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title => 'Score Mean', |
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align => 'right', |
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color => '#FFFFE6', |
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format => '%4.2f', |
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sortable => 'no', |
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graphable => 'no', |
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long_title => 'Mean Sequence Score', |
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selectable => 'yes', |
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defaultselected => 'no', |
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}, |
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{ name => 'scorestd', |
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title => 'Score STD', |
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align => 'right', |
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color => '#FFFFE6', |
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format => '%4.2f', |
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sortable => 'no', |
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graphable => 'no', |
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long_title => 'Standard Deviation of Sequence Scores', |
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selectable => 'yes', |
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defaultselected => 'no', |
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}, |
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{ name => 'scoremax', |
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title => 'Score Max', |
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align => 'right', |
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color => '#FFFFE6', |
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format => '%4.2f', |
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sortable => 'no', |
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graphable => 'no', |
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long_title => 'Maximum Sequence Score', |
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selectable => 'yes', |
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defaultselected => 'no', |
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}, |
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{ name => 'scoremin', |
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title => 'Score Min', |
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align => 'right', |
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color => '#FFFFE6', |
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format => '%4.2f', |
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sortable => 'no', |
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graphable => 'no', |
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long_title => 'Minumum Sequence Score', |
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selectable => 'yes', |
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defaultselected => 'no', |
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}, |
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{ name => 'scorecount', |
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title => 'Score N', |
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align => 'right', |
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color => '#FFFFE6', |
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format => '%4d', |
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sortable => 'no', |
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graphable => 'no', |
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long_title => 'Number of Students in score computations', |
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selectable => 'yes', |
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defaultselected => 'no', |
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}, |
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{ name => 'countmean', |
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title => 'Count Mean', |
| |
align => 'right', |
| |
color => '#FFFFFF', |
| |
format => '%4.2f', |
| |
sortable => 'no', |
| |
graphable => 'no', |
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long_title => 'Mean Sequence Score', |
| |
selectable => 'yes', |
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defaultselected => 'no', |
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}, |
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{ name => 'countstd', |
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title => 'Count STD', |
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align => 'right', |
| |
color => '#FFFFFF', |
| |
format => '%4.2f', |
| |
sortable => 'no', |
| |
graphable => 'no', |
| |
long_title => 'Standard Deviation of Sequence Scores', |
| |
selectable => 'yes', |
| |
defaultselected => 'no', |
| |
}, |
| |
{ name => 'countmax', |
| |
title => 'Count Max', |
| |
align => 'right', |
| |
color => '#FFFFFF', |
| |
format => '%4.2f', |
| |
sortable => 'no', |
| |
graphable => 'no', |
| |
long_title => 'Maximum Number of Correct Problems', |
| |
selectable => 'yes', |
| |
defaultselected => 'no', |
| |
}, |
| |
{ name => 'countmin', |
| |
title => 'Count Min', |
| |
align => 'right', |
| |
color => '#FFFFFF', |
| |
format => '%4.2f', |
| |
sortable => 'no', |
| |
graphable => 'no', |
| |
long_title => 'Minumum Number of Correct Problems', |
| |
selectable => 'yes', |
| |
defaultselected => 'no', |
| |
}, |
| |
{ name => 'count', |
| |
title => 'Count N', |
| |
align => 'right', |
| |
color => '#FFFFFF', |
| |
format => '%4d', |
| |
sortable => 'no', |
| |
graphable => 'no', |
| |
long_title => 'Number of Students in score computations', |
| |
selectable => 'yes', |
| |
defaultselected => 'no', |
| |
}, |
| |
{ name => 'KR-21', |
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title => 'KR-21', |
| |
align => 'right', |
| |
color => '#FFAAAA', |
| |
format => '%4.2f', |
| |
sortable => 'no', |
| |
graphable => 'no', |
| |
long_title => 'KR-21 reliability statistic', |
| |
selectable => 'yes', |
| |
defaultselected => 'no', |
| |
}, |
| |
); |
| |
|
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my %SelectedFields; |
| |
|
| |
sub parse_field_selection { |
| |
# |
| |
# Pull out the defaults |
| |
if (! defined($env{'form.fieldselections'})) { |
| |
$env{'form.fieldselections'} = []; |
| |
foreach my $field (@Fields) { |
| |
next if ($field->{'selectable'} ne 'yes'); |
| |
if ($field->{'defaultselected'} eq 'yes') { |
| |
push(@{$env{'form.fieldselections'}},$field->{'name'}); |
| |
} |
| |
} |
| } |
} |
| |
# |
| my $Ptr = ''; |
# Make sure the data we are plotting is there |
| $Ptr .= '<table border="0"><tbody>'; |
my %NeededFields; |
| $Ptr .= '<tr><td align="right"><b>Select Map</b></td>'."\n"; |
if (exists($env{'form.plot'}) && $env{'form.plot'} ne '' && |
| $Ptr .= '<td align="left">'; |
$env{'form.plot'} ne 'none') { |
| $Ptr .= &Apache::lonhtmlcommon::MapOptions(\%cache, 'ProblemStatistics', |
if ($env{'form.plot'} eq 'degrees') { |
| 'Statistics'); |
$NeededFields{'deg_of_diff'}++; |
| $Ptr .= '</td></tr>'."\n"; |
$NeededFields{'deg_of_disc'}++; |
| $Ptr .= '<tr><td align="right"><b>Sorting Type:</b></td>'."\n"; |
} elsif ($env{'form.plot'} eq 'tries statistics') { |
| $Ptr .= '<td align="left">'."\n"; |
$NeededFields{'mean_tries'}++; |
| $Ptr .= &Apache::lonhtmlcommon::AscendOrderOptions( |
$NeededFields{'std_tries'}++; |
| $cache{'ProblemStatisticsAscend'}, |
$NeededFields{'problem_num'}++; |
| 'ProblemStatistics', |
} else { |
| 'Statistics'); |
$NeededFields{$env{'form.plot'}}++; |
| $Ptr .= '</td></tr>'."\n"; |
} |
| $Ptr .= &ProblemStatisticsButtons($cache{'DisplayFormat'}); |
|
| $Ptr .= '</table>'; |
|
| $Ptr .= &ProblemStatisticsLegend(); |
|
| $r->print($Ptr); |
|
| $r->rflush(); |
|
| |
|
| untie(%cache); |
|
| &Create_PrgWin($r); |
|
| my $count=0; |
|
| foreach (@$students) { |
|
| &Update_PrgWin(scalar(@$students),$count,$_,$r); |
|
| my $courseData = |
|
| &Apache::loncoursedata::DownloadCourseInformation($_, $courseID); |
|
| last if ($c->aborted()); |
|
| if(tie(%cache,'GDBM_File',$cacheDB,&GDBM_WRCREAT,0640)) { |
|
| &Apache::loncoursedata::ProcessStudentData(\%cache, |
|
| $courseData, $_); |
|
| untie(%cache); |
|
| } |
|
| $count++; |
|
| } |
|
| &Close_PrgWin($r); |
|
| if($c->aborted()) { return; } |
|
| |
|
| unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER,0640)) { |
|
| return '<html><body>Unable to tie database.</body></html>'; |
|
| } |
|
| |
|
| my %Header = (0,"Homework Sets Order",1,"#Stdnts",2,"Tries",3,"Mod", |
|
| 4,"Mean",5,"#YES",6,"#yes",7,"%Wrng",8,"DoDiff", |
|
| 9,"S.D.",10,"Skew.",11,"D.F.1st",12,"D.F.2nd", 13, "Disc."); |
|
| my $color=&setbgcolor(0); |
|
| |
|
| my $state=$ENV{'form.ProblemStatisticsHeading'}; |
|
| |
|
| my $TempCache; |
|
| |
|
| if ($state) { |
|
| $TempCache=&CacheStatisticsTable($state,\%cache,\%Header, |
|
| $r,$color); |
|
| } else { |
|
| my %discriminant=(); |
|
| my @list=(); |
|
| my %Discuss=&Apache::loncoursedata::LoadDiscussion($courseID); |
|
| my $index=0; |
|
| foreach (@$students) { |
|
| $index++; |
|
| &ExtractStudentData(\%cache, $_, \@list,\%Discuss, $r, |
|
| \%discriminant); |
|
| } |
|
| my ($upper, $lower) = &Discriminant(\%discriminant,$r); |
|
| $TempCache= &BuildStatisticsTable(\%cache, $upper, $lower, |
|
| \@list, \%Header, $students, |
|
| $r, $color); |
|
| } |
|
| untie(%cache); |
|
| |
|
| foreach (keys %$TempCache) { |
|
| last if ($c->aborted()); |
|
| if(tie(%cache,'GDBM_File',$cacheDB,&GDBM_WRCREAT,0640)) { |
|
| $cache{$_}=$TempCache->{$_}; |
|
| |
|
| untie(%cache); |
|
| } |
|
| } |
|
| if($c->aborted()) { return; } |
|
| untie(%cache); |
|
| } |
|
| |
|
| |
|
| #---- Problem Statistics Web Page --------------------------------------- |
|
| |
|
| sub CreateProblemStatisticsTableHeading { |
|
| my ($displayFormat,$sequenceSource,$sequenceTitle,$headings,$r)=@_; |
|
| if($displayFormat eq 'Display CSV Format') { |
|
| $r->print('<br>"'.$sequenceTitle.'","'); |
|
| $r->print($sequenceSource.'"'); |
|
| return; |
|
| } |
} |
| if ($sequenceSource eq 'Sorted by: ') { |
# |
| $r->print('<br><b>'.$sequenceSource.$sequenceTitle.'</b>'); |
# This should not happen, but in case it does... |
| } else { |
if (ref($env{'form.fieldselections'}) ne 'ARRAY') { |
| $r->print('<br><a href="'.$sequenceSource. |
$env{'form.fieldselections'} = [$env{'form.fieldselections'}]; |
| '" target="_blank">'.$sequenceTitle.'</a>'); |
} |
| |
# |
| |
# Set the field data and the selected fields (for easier checking) |
| |
undef(%SelectedFields); |
| |
foreach my $field (@Fields) { |
| |
if ($field->{'selectable'} ne 'yes') { |
| |
$field->{'selected'} = 'yes'; |
| |
} else { |
| |
$field->{'selected'} = 'no'; |
| |
} |
| |
if (exists($NeededFields{$field->{'name'}})) { |
| |
$field->{'selected'} = 'yes'; |
| |
$SelectedFields{$field->{'name'}}++; |
| |
} |
| |
foreach my $selection (@{$env{'form.fieldselections'}}) { |
| |
if ($selection eq $field->{'name'} || $selection eq 'all') { |
| |
$field->{'selected'} = 'yes'; |
| |
$SelectedFields{$field->{'name'}}++; |
| |
} |
| |
} |
| } |
} |
| my $Result = "\n".'<table border=2><tr><th>P#</th>'."\n"; |
# |
| for(my $nIndex=0; $nIndex < (scalar (keys %$headings)); $nIndex++) { |
# Always show all the sequence statistics (for now) |
| $Result .= '<th>'.'<input type="submit" name="'; |
foreach my $field (@SeqFields) { |
| $Result .= 'ProblemStatisticsHeading" value="'; |
$field->{'selected'} = 'yes'; |
| $Result .= $headings->{$nIndex}.'" />'.'</th>'."\n"; |
|
| } |
} |
| $Result .= "\n".'</tr>'."\n"; |
return; |
| $r->print($Result); |
|
| $r->rflush(); |
|
| } |
} |
| |
|
| sub CloseTable { |
sub field_selection_input { |
| my ($cache,$r)=@_; |
my $Str = '<select name="fieldselections" multiple="multiple" size="5">'."\n"; |
| if($cache->{'DisplayFormat'} eq 'Display CSV Format') { |
$Str .= '<option value="all">all</option>'."\n"; |
| return; |
foreach my $field (@Fields) { |
| } |
next if ($field->{'selectable'} ne 'yes'); |
| $r->print("\n".'</table>'."\n"); |
$Str .= ' <option value="'.$field->{'name'}.'" '; |
| $r->rflush(); |
if ($field->{'selected'} eq 'yes') { |
| |
$Str .= 'selected '; |
| |
} |
| |
$Str .= '>'.$field->{'title'}.'</option>'."\n"; |
| |
} |
| |
$Str .= "</select>\n"; |
| } |
} |
| |
|
| |
############################################### |
| |
############################################### |
| |
|
| # Create progress |
=pod |
| sub Create_PrgWin { |
|
| my ($r)=@_; |
|
| $r->print(<<ENDPOP); |
|
| <script> |
|
| popwin=open('','popwin','width=400,height=100'); |
|
| popwin.document.writeln('<html><body bgcolor="#88DDFF">'+ |
|
| '<title>LON-CAPA Statistics</title>'+ |
|
| '<h4>Computation Progress</h4>'+ |
|
| '<form name=popremain>'+ |
|
| '<input type=text size=35 name=remaining value=Starting></form>'+ |
|
| '</body></html>'); |
|
| popwin.document.close(); |
|
| </script> |
|
| ENDPOP |
|
| |
|
| $r->rflush(); |
=item &CreateInterface() |
| } |
|
| |
|
| # update progress |
Create the main intereface for the statistics page. Allows the user to |
| sub Update_PrgWin { |
select sections, maps, and output. |
| my ($totalStudents,$index,$name,$r)=@_; |
|
| $r->print('<script>popwin.document.popremain.remaining.value="'. |
=cut |
| 'Computing '.$index.'/'.$totalStudents.': '. |
|
| $name.'";</script>'); |
############################################### |
| $r->rflush(); |
############################################### |
| |
sub CreateInterface { |
| |
my ($r) = @_; |
| |
# |
| |
&parse_field_selection(); |
| |
# |
| |
my $Str = ''; |
| |
$Str .= '<p>'; |
| |
$Str .= &Apache::loncommon::start_data_table(); |
| |
$Str .= &Apache::loncommon::start_data_table_header_row(); |
| |
$Str .= '<th>'.&mt('Sections').'</th>'; |
| |
$Str .= '<th>'.&mt('Groups').'</th>'; |
| |
$Str .= '<th>'.&mt('Access Status').'</th>'; |
| |
$Str .= '<th>'.&mt('Sequences and Folders').'</th>'; |
| |
$Str .= '<th>'.&mt('Statistics').'</th>'; |
| |
$Str .= '<th>'.&mt('Plot Graph').'</th>'; |
| |
$Str .= '<th>'.&mt('Time Period').'</th>'; |
| |
$Str .= &Apache::loncommon::end_data_table_header_row(); |
| |
# |
| |
$Str .= &Apache::loncommon::start_data_table_row(); |
| |
$Str .= '<td align="center" valign="top">'."\n"; |
| |
$Str .= &Apache::lonstatistics::SectionSelect('Section','multiple',5); |
| |
$Str .= '</td><td align="center" valign="top">'; |
| |
$Str .= &Apache::lonstatistics::GroupSelect('Group','multiple',5); |
| |
$Str .= '</td><td align="center" valign="top">'; |
| |
$Str .= &Apache::lonhtmlcommon::StatusOptions(undef,undef,5); |
| |
$Str .= '</td><td align="center" valign="top">'; |
| |
# |
| |
$Str .= &Apache::lonstatistics::map_select('Maps','multiple,all',5); |
| |
$Str .= '</td><td align="center" valign="top">'; |
| |
$Str .= &field_selection_input(); |
| |
$Str .= '</td><td align="center" valign="top">'; |
| |
$Str .= &plot_dropdown(); |
| |
$Str .= '</td>'."\n"; |
| |
$Str .= '</td><td align="center" valign="top">'; |
| |
$Str .= &Apache::lonstathelpers::limit_by_time_form(); |
| |
$Str .= '</td>'."\n"; |
| |
$Str .= &Apache::loncommon::end_data_table_row(); |
| |
$Str .= &Apache::loncommon::end_data_table(); |
| |
# |
| |
$Str .= '</p>'; |
| |
$Str .= '<input type="submit" name="GenerateStatistics" value="'. |
| |
&mt('Generate Statistics').'" />'; |
| |
$Str .= (' 'x10); |
| |
# |
| |
return $Str; |
| } |
} |
| |
|
| # close Progress Line |
############################################### |
| sub Close_PrgWin { |
############################################### |
| my ($r)=@_; |
|
| $r->print('<script>popwin.close()</script>'); |
|
| $r->rflush(); |
|
| } |
|
| |
|
| |
=pod |
| # ------ Dump the Student's DB file and handling the data for statistics table |
|
| sub ExtractStudentData { |
|
| my ($cache,$name,$list,$Discuss,$r,$discriminant)=@_; |
|
| my $totalTries = 0; |
|
| my $totalAwarded = 0; |
|
| my $spent=0; |
|
| my $spent_yes=0; |
|
| my $TotDiscuss=0; |
|
| my $TotalOpend = 0; |
|
| my $ProbSolved = 0; |
|
| my $ProbTot = 0; |
|
| my $TotFirst = 0; |
|
| my $TimeTot = 0; |
|
| my $Discussed=0; |
|
| my $discrim=''; |
|
| my $tempSequenceOrder=100; |
|
| |
|
| #$Apache::lonxml::debug=1; |
|
| #&Apache::lonhomework::showhash(%$cache); |
|
| #$Apache::lonxml::debug=0; |
|
| |
|
| foreach my $sequence (split(':', $cache->{'orderedSequences'})) { |
|
| my $tempProblemOrder=100; |
|
| if($cache->{'ProblemStatisticsMaps'} ne 'All Maps' && |
|
| $cache->{'ProblemStatisticsMaps'} ne $cache->{$sequence.':title'}) { |
|
| next; |
|
| } |
|
| $tempSequenceOrder++; |
|
| |
|
| foreach my $problemID (split(':', $cache->{$sequence.':problems'})) { |
=item &BuildProblemStatisticsPage() |
| my $problem = $cache->{$problemID.':problem'}; |
|
| my $LatestVersion = $cache->{$name.':version:'.$problem}; |
|
| # Output dashes for all the parts of this problem if there |
|
| # is no version information about the current problem. |
|
| #if(!$LatestVersion) { |
|
| # foreach my $part (split(/\:/,$cache->{$sequence.':'. |
|
| # $problemID. |
|
| # ':parts'})) { |
|
| # $codes .= "-,"; |
|
| # $attempts .= "0,"; |
|
| # } |
|
| # next; |
|
| #} |
|
| |
|
| my %partData=undef; |
|
| $partData{'count'}=0; |
|
| # Initialize part data, display skips correctly |
|
| # Skip refers to when a student made no submissions on that |
|
| # part/problem. |
|
| foreach my $part (split(/\:/,$cache->{$sequence.':'. |
|
| $problemID. |
|
| ':parts'})) { |
|
| $tempProblemOrder++; |
|
| $partData{'count'}++; |
|
| $partData{$part.':order'}=$tempProblemOrder; |
|
| $partData{$part.':tries'}=0; |
|
| $partData{$part.':code'}='-'; |
|
| } |
|
| |
|
| # Looping through all the versions of each part, starting with the |
Main interface to problem statistics. |
| # oldest version. Basically, it gets the most recent |
|
| # set of grade data for each part. |
|
| for(my $Version=1; $Version<=$LatestVersion; $Version++) { |
|
| foreach my $part (split(/\:/,$cache->{$sequence.':'. |
|
| $problemID. |
|
| ':parts'})) { |
|
| |
|
| if(!defined($cache->{$name.":$Version:$problem". |
|
| ":resource.$part.solved"})) { |
|
| # No grade for this submission, so skip |
|
| next; |
|
| } |
|
| |
|
| my $tries=0; |
=cut |
| my $time=0; |
|
| my $awarded=0; |
############################################### |
| $Discussed=0; |
############################################### |
| my $code='-'; |
my $navmap; |
| |
my @sequences; |
| $awarded = $cache->{"$name:$Version:$problem:resource.". |
|
| "$part.awarded"}; |
sub clean_up { |
| $partData{$part.':awarded'} = ($awarded) ? $awarded : 0; |
undef($navmap); |
| $totalAwarded += $awarded; |
undef(@sequences); |
| |
} |
| $tries = $cache->{"$name:$Version:$problem". |
|
| ":resource.$part.tries"}; |
sub BuildProblemStatisticsPage { |
| $partData{$part.':tries'} = ($tries) ? $tries : 0; |
my ($r,$c)=@_; |
| $partData{$part.':wrong'} = $partData{$part.':tries'}; |
undef($navmap); |
| $totalTries += $tries; |
undef(@sequences); |
| |
# |
| my $val = $cache->{$name.":$Version:$problem". |
my %Saveable_Parameters = ('Status' => 'scalar', |
| ":resource.$part.solved"}; |
'statsoutputmode' => 'scalar', |
| if ($val eq 'correct_by_student') {$code = 'C';} |
'Section' => 'array', |
| elsif ($val eq 'correct_by_override') {$code = 'O';} |
'Groups' => 'array', |
| elsif ($val eq 'incorrect_attempted') {$code = 'I';} |
'StudentData' => 'array', |
| elsif ($val eq 'incorrect_by_override'){$code = 'I';} |
'Maps' => 'array', |
| elsif ($val eq 'excused') {$code = 'x';} |
'fieldselections'=> 'array'); |
| $partData{$part.':code'}=$code; |
&Apache::loncommon::store_course_settings('statistics', |
| if($partData{$part.':wrong'} ne 0 && |
\%Saveable_Parameters); |
| ($code eq 'C' || $code eq 'O')) { |
&Apache::loncommon::restore_course_settings('statistics', |
| $partData{$part.':wrong'}--; |
\%Saveable_Parameters); |
| } |
# |
| } |
&Apache::lonstatistics::PrepareClasslist(); |
| |
# |
| |
# Clear the package variables |
| |
undef(@StatsArray); |
| |
undef(%SeqStat); |
| |
# |
| |
# Finally let the user know we are here |
| |
$r->print(&Apache::lonhtmlcommon::breadcrumbs('Overall Problem Statistics', |
| |
'Statistics_Overall_Key')); |
| |
|
| |
my $interface = &CreateInterface($r); |
| |
$r->print($interface); |
| |
$r->print('<input type="hidden" name="sortby" value="'.$env{'form.sortby'}. |
| |
'" />'); |
| |
# |
| |
my @CacheButtonHTML = |
| |
&Apache::lonstathelpers::manage_caches($r,'Statistics','stats_status'); |
| |
my $Str; |
| |
foreach my $html (@CacheButtonHTML) { |
| |
$Str.=$html.(' 'x5); |
| |
} |
| |
# |
| |
$r->print($Str); |
| |
if (! exists($env{'form.firstrun'})) { |
| |
$r->print('<p class="LC_info"><b>'. |
| |
&mt('Press "Generate Statistics" when you are ready.'). |
| |
'</b></p>'. |
| |
'<p class="LC_info">'. |
| |
&mt('It may take some time to update the student data '. |
| |
'for the first analysis. Future analysis this session '. |
| |
'will not have this delay.'). |
| |
'</p>'); |
| |
&clean_up(); |
| |
return; |
| |
} |
| |
$r->rflush(); |
| |
# |
| |
# This probably does not need to be done each time we are called, but |
| |
# it does not slow things down noticably. |
| |
&Apache::loncoursedata::populate_weight_table(); |
| |
# |
| |
($navmap,@sequences) = |
| |
&Apache::lonstatistics::selected_sequences_with_assessments(); |
| |
if (! ref($navmap)) { |
| |
$r->print('<div class="LC_error">'.&mt('A course-wide error occurred.').'</div>'. |
| |
'<h3>'.$navmap.'</h3>'); |
| |
&clean_up(); |
| |
return; |
| |
} |
| |
if (exists($env{'form.Excel'})) { |
| |
$r->print('<p>'. |
| |
&Apache::lonstatistics::section_and_enrollment_description(). |
| |
'</p>'); |
| |
&Excel_output($r); |
| |
} else { |
| |
$r->print('<input type="submit" name="Excel" value="'. |
| |
&mt('Produce Excel Output').'" />'.' 'x5); |
| |
$r->rflush(); |
| |
$r->print('<p>'. |
| |
&Apache::lonstatistics::section_and_enrollment_description(). |
| |
'</p>'); |
| |
my $count = 0; |
| |
foreach my $seq (@sequences) { |
| |
my @resources = |
| |
&Apache::lonstathelpers::get_resources($navmap,$seq); |
| |
$count += scalar(@resources); |
| |
} |
| |
if ($count > 10) { |
| |
$r->print('<p>'. |
| |
&mt('Compiling statistics for [quant,_1,problem]',$count). |
| |
'</p>'); |
| |
if ($count > 30) { |
| |
$r->print('<p class="LC_info">'.&mt('This will take some time.').'</p>'); |
| |
} |
| |
$r->rflush(); |
| |
} |
| |
# |
| |
my $sortby = $env{'form.sortby'}; |
| |
$sortby = 'container' if (! defined($sortby) || $sortby =~ /^\s*$/); |
| |
my $plot = $env{'form.plot'}; |
| |
if ($plot eq '' || $plot eq 'none') { |
| |
undef($plot); |
| |
} |
| |
if ($sortby eq 'container' && ! defined($plot)) { |
| |
&output_sequence_statistics($r); |
| |
&output_html_by_sequence($r); |
| |
} else { |
| |
if (defined($plot)) { |
| |
&make_plot($r,$plot); |
| } |
} |
| |
&output_html_stats($r); |
| |
&output_sequence_statistics($r); |
| |
} |
| |
} |
| |
&clean_up(); |
| |
return; |
| |
} |
| |
|
| # Loop through all the parts for the current problem in the |
sub output_sequence_statistics { |
| # correct order and prepare the output |
my ($r) = @_; |
| my $partCounter=0; |
my $c=$r->connection(); |
| foreach (split(/\:/,$cache->{$sequence.':'.$problemID. |
$r->print('<h2>'.&mt('Sequence Statistics'). |
| ':parts'})) { |
&Apache::loncommon::help_open_topic('Statistics_Sequence'). |
| $partCounter++; |
'</h2>'); |
| my $Yes = 0; |
$r->print(&Apache::loncommon::start_data_table().&Apache::loncommon::start_data_table_header_row()); |
| if($partData{$_.':code'} eq 'C' || |
$r->print(&sequence_html_header()); |
| $partData{$_.':code'} eq 'O') { |
$r->print(&Apache::loncommon::end_data_table_header_row()); |
| $Yes=1; |
foreach my $seq (@sequences) { |
| } |
last if ($c->aborted); |
| my $pOrder=$partData{$_.':order'}; |
&compute_sequence_statistics($seq); |
| my $ptr = $tempSequenceOrder.':'.$pOrder.':'.$problemID; |
$r->print(&sequence_html_output($seq)); |
| |
} |
| |
$r->print(&Apache::loncommon::end_data_table()); |
| |
$r->rflush(); |
| |
return; |
| |
} |
| |
|
| if($partData{'count'} > 1) { |
|
| $ptr .= "*(part $_)"; |
|
| } |
|
| $discrim .= '&'; |
|
| |
|
| my ($pr_no,$dod)=split('&',$ptr); |
########################################################## |
| # my $DoDiff=$DoDiff->{$dod}; |
########################################################## |
| # $r->print('<br>'.$name.'---'.$ptr.'==='.$DoDiff); |
## |
| |
## HTML output routines |
| my $Fac = ($partData{$_.':tries'}) ? |
## |
| ($partData{$_.':awarded'}/$partData{$_.':tries'}) : 0; |
########################################################## |
| my $DisF; |
########################################################## |
| if($Fac > 0 && $Fac < 1) { |
sub output_html_by_sequence { |
| $DisF = sprintf( "%.4f", $Fac ); |
my ($r) = @_; |
| } else { |
my $c = $r->connection(); |
| $DisF = $Fac; |
$r->print('<br>'.&html_preamble()); |
| } |
# |
| |
foreach my $seq (@sequences) { |
| |
last if ($c->aborted); |
| |
$r->print("<h3>".$seq->compTitle."</h3>". |
| |
&Apache::loncommon::start_data_table(). |
| |
&Apache::loncommon::start_data_table_header_row(). |
| |
&statistics_table_header('no container'). |
| |
&Apache::loncommon::end_data_table_header_row()."\n"); |
| |
my @Data = &compute_statistics_on_sequence($seq); |
| |
foreach my $data (@Data) { |
| |
$r->print(&Apache::loncommon::start_data_table_row(). |
| |
&statistics_html_table_data($data,'no container'). |
| |
&Apache::loncommon::end_data_table_row()."\n"); |
| |
} |
| |
$r->print(&Apache::loncommon::end_data_table()."\n"); |
| |
$r->rflush(); |
| |
} |
| |
return; |
| |
} |
| |
|
| if ($Discuss->{"$name:$problem"}) { |
sub output_html_stats { |
| $TotDiscuss++; |
my ($r)=@_; |
| $Discussed=1; |
&compute_all_statistics($r); |
| } |
$r->print(&html_preamble()); |
| my $time = $cache->{"$name:$LatestVersion:$problem:timestamp"}; |
&sort_data($env{'form.sortby'}); |
| $discrim .= $tempSequenceOrder.'@'.$pOrder.'='.$DisF.'+'.$Yes; |
# |
| $ptr .= '&'.$partData{$_.':tries'}. |
my $count=0; |
| '&'.$partData{$_.':wrong'}. |
foreach my $data (@StatsArray) { |
| '&'.$partData{$_.':code'}; |
if ($count++ % 50 == 0) { |
| push (@$list, $ptr."&$Discussed"); |
$r->print(&Apache::loncommon::end_data_table()); |
| # $r->print('<br>'.$_.$name.'---'.$ptr); |
$r->print(&Apache::loncommon::start_data_table(). |
| |
&Apache::loncommon::start_data_table_row(). |
| #### if ($DoDiff>0.85) { |
&statistics_table_header(). |
| |
&Apache::loncommon::end_data_table_row()); |
| |
} |
| |
$r->print(&Apache::loncommon::start_data_table_row(). |
| |
&statistics_html_table_data($data). |
| |
&Apache::loncommon::end_data_table_row()); |
| |
} |
| |
$r->print(&Apache::loncommon::end_data_table_row()); |
| |
return; |
| |
} |
| |
|
| $TimeTot += $time; |
sub html_preamble { |
| |
my $Str=''; |
| |
$Str .= "<h2>". |
| |
$env{'course.'.$env{'request.course.id'}.'.description'}. |
| |
"</h2>\n"; |
| |
my ($starttime,$endtime) = &Apache::lonstathelpers::get_time_limits(); |
| |
if (defined($starttime) || defined($endtime)) { |
| |
# Inform the user what the time limits on the data are. |
| |
$Str .= '<h3>'.&mt('Statistics on submissions from [_1] to [_2]', |
| |
&Apache::lonlocal::locallocaltime($starttime), |
| |
&Apache::lonlocal::locallocaltime($endtime) |
| |
).'</h3>'; |
| |
} |
| |
$Str .= "<p>".&mt('Compiled on [_1]', |
| |
&Apache::lonlocal::locallocaltime(time))."</p>"; |
| |
return $Str; |
| |
} |
| |
|
| if ($Yes==1 && $partData{$_.':tries'}==1) { |
|
| $TotFirst++; |
|
| } |
|
| # my $Acts= $Activity->{$name.':'.$problem}; |
|
| # if ($Acts) { |
|
| # my $Pt=&ProcAct( $Acts, $time ); |
|
| #my ($spe,$beg) = split(/\+/,$Pt); |
|
| # my $spe= $Pt; |
|
| # if ($Yes==1) {$spent_yes += $spe;} |
|
| # $spent += $spe; |
|
| #$Beg += $beg; |
|
| # $r->print('<br>'.$name.'---'.$problem.'---'.$spe); |
|
| # } |
|
| $TotalOpend++; |
|
| $ProbTot++; |
|
| |
|
| $tempProblemOrder++; |
############################################### |
| |
############################################### |
| |
## |
| |
## Misc HTML output routines |
| |
## |
| |
############################################### |
| |
############################################### |
| |
sub statistics_html_table_data { |
| |
my ($data,$options) = @_; |
| |
my $row = ''; |
| |
foreach my $field (@Fields) { |
| |
next if ($options =~ /no $field->{'name'}/); |
| |
next if ($field->{'selected'} ne 'yes'); |
| |
$row .= '<td style="background-color:'.$field->{'color'}.'"'; |
| |
if (exists($field->{'align'})) { |
| |
$row .= ' align="'.$field->{'align'}.'"'; |
| } |
} |
| |
$row .= '>'; |
| |
if (exists($field->{'special'}) && $field->{'special'} eq 'link') { |
| |
$row .= '<a href="'.$data->{$field->{'name'}.'.link'}.'">'; |
| } |
} |
| |
if (exists($field->{'format'}) && $data->{$field->{'name'}} !~ /[A-Z]/i) { |
| |
$row .= sprintf($field->{'format'},$data->{$field->{'name'}}); |
| |
} else { |
| |
$row .= $data->{$field->{'name'}}; |
| |
} |
| |
if (exists($field->{'special'}) && $field->{'special'} eq 'link') { |
| |
$row.= '</a>'; |
| |
} |
| |
$row .= '</td>'; |
| } |
} |
| my $pstr; |
return $row; |
| if($totalTries) { |
|
| my $DisFac = ($totalAwarded/$totalTries); |
|
| my $DisFactor = sprintf( "%.4f", $DisFac ); |
|
| my $TS = sprintf( "%.2f", $spent ); |
|
| my $TS_yes = sprintf( "%.2f", $spent_yes ); |
|
| $pstr=$DisFactor.':'.$name.':'.$ProbTot.':'.$TotalOpend.':'. |
|
| $totalTries.':'.$ProbSolved.':'.$TotFirst.':'. |
|
| $TS_yes.':'.$TS.':'.$TotDiscuss; |
|
| (%$discriminant)->{$pstr}=$discrim; |
|
| } |
|
| } |
} |
| |
|
| sub NumericSort { |
sub statistics_table_header { |
| $a <=> $b; |
my ($options) = @_; |
| } |
my $header_row; |
| |
foreach my $field (@Fields) { |
| sub OrderedSort { |
next if ($options =~ /no $field->{'name'}/); |
| if ($ENV{'form.order'} eq 'Descending') { |
next if ($field->{'selected'} ne 'yes'); |
| $b <=> $a; |
$header_row .= '<th>'; |
| } else { |
if (exists($field->{'sortable'}) && $field->{'sortable'} eq 'yes') { |
| $a <=> $b; |
$header_row .= '<a href="javascript:'. |
| |
'document.Statistics.sortby.value='."'".$field->{'name'}."'". |
| |
';document.Statistics.submit();">'; |
| |
} |
| |
$header_row .= &mt($field->{'title'}); |
| |
if ($options =~ /sortable/) { |
| |
$header_row.= '</a>'; |
| |
} |
| |
if ($options !~ /no plots/ && |
| |
exists($field->{'graphable'}) && |
| |
$field->{'graphable'} eq 'yes') { |
| |
$header_row.=' ('; |
| |
$header_row .= '<a href="javascript:'. |
| |
"document.Statistics.plot.value='$field->{'name'}'". |
| |
';document.Statistics.submit();">'; |
| |
$header_row .= &mt('plot').'</a>)'; |
| |
} |
| |
$header_row .= '</th>'; |
| } |
} |
| |
return $header_row; |
| } |
} |
| |
|
| |
sub sequence_html_header { |
| |
my $Str .= '<tr>'; |
| |
foreach my $field (@SeqFields) { |
| |
# next if ($field->{'selected'} ne 'yes'); |
| |
$Str .= '<th bgcolor="'.$field->{'color'}.'"'; |
| |
$Str .= '>'.$field->{'title'}.'</th>'; |
| |
} |
| |
$Str .= '</tr>'; |
| |
return $Str; |
| |
} |
| |
|
| |
|
| sub BuildStatisticsTable { |
sub sequence_html_output { |
| my ($cache,$upper,$lower,$list,$headings,$students,$r,$color)=@_; |
my ($seq) = @_; |
| my $NoElements = scalar @$list; |
my $data = $SeqStat{$seq->symb}; |
| my @list=sort(@$list); |
my $row = '<tr>'; |
| |
foreach my $field (@SeqFields) { |
| #6666666 |
next if ($field->{'selected'} ne 'yes'); |
| # my $file="/home/httpd/perl/tmp/183d.txt"; |
$row .= '<td bgcolor="'.$field->{'color'}.'"'; |
| # open(OUT, ">$file"); |
if (exists($field->{'align'})) { |
| #6666666 |
$row .= ' align="'.$field->{'align'}.'"'; |
| ## &Apache::lonstatistics::Create_PrgWin($r); |
|
| ##777777 |
|
| ## my (%Activity) = &LoadActivityLog(); |
|
| ## $r->print('<script>popwin.document.popremain.remaining.value="'. |
|
| ## 'Loading Discussion...";</script>'); |
|
| ## my ($doDiffFile) = &LoadDoDiffFile(); |
|
| |
|
| ##777777 |
|
| ## $Str .= &Classify($discriminantFactor, $students); |
|
| |
|
| my $p_count = 0; |
|
| my $dummy; |
|
| my $p_val; |
|
| my $ResId; |
|
| my %TempCache; |
|
| my $cIdx=0; |
|
| |
|
| foreach my $sequence (split(':', $cache->{'orderedSequences'})) { |
|
| if($cache->{'ProblemStatisticsMaps'} ne 'All Maps' && |
|
| $cache->{'ProblemStatisticsMaps'} ne $cache->{$sequence.':title'}) { |
|
| next; |
|
| } |
} |
| &CreateProblemStatisticsTableHeading($cache->{'DisplayFormat'}, |
$row .= '>'; |
| $cache->{$sequence.':source'}, |
if (exists($field->{'format'})) { |
| $cache->{$sequence.':title'}, |
$row .= sprintf($field->{'format'},$data->{$field->{'name'}}); |
| $headings,$r); |
} else { |
| my ($tar,$Tries,$Wrongs,$Code,$Disc)=split(/\&/, |
$row .= $data->{$field->{'name'}}; |
| $list[$cIdx]); |
} |
| my ($SqOrd,$PrOrd,$Prob)=split(/\:/,$tar); |
$row .= '</td>'; |
| $sequence+=100; |
|
| while ($SqOrd==$sequence && $cIdx<$NoElements) { |
|
| my %storestats=(); |
|
| my $pOrd=$PrOrd; |
|
| my $Temp = $Prob; |
|
| my $MxTries = 0; |
|
| my $TotalTries = 0; |
|
| my $YES = 0; |
|
| my $Incorrect = 0; |
|
| my $Override = 0; |
|
| my $StdNo = 0; |
|
| my $DiscNo=0; |
|
| my @StdLst; |
|
| while ($pOrd==$PrOrd && $cIdx<$NoElements) |
|
| { |
|
| $cIdx++; |
|
| $StdNo++; |
|
| $StdLst[ $StdNo ] = $Tries; |
|
| $TotalTries += $Tries; |
|
| if ( $MxTries < $Tries ) { $MxTries = $Tries; } |
|
| if ( $Code eq 'C' ){ $YES++; } |
|
| elsif( $Code eq 'I' ) { $Incorrect++; } |
|
| elsif( $Code eq 'O' ) { $Override++; } |
|
| elsif( $Code eq '-' ) { $StdNo--; } |
|
| ($tar,$Tries,$Wrongs,$Code,$Disc)=split(/\&/, |
|
| $list[$cIdx]); |
|
| ($SqOrd,$PrOrd,$Prob)=split(/\:/,$tar); |
|
| } |
|
| |
|
| $p_count++; |
|
| my $Dummy; |
|
| ($ResId,$Dummy)=split(/\*/,$Temp); |
|
| $Temp = '<a href="'.$cache->{$ResId.':source'}. |
|
| '" target="_blank">'.$cache->{$ResId.':title'}.$Dummy.'</a>'; |
|
| |
|
| # my $urlres = $cache->{$sequence.':source'}); |
|
| #check with Gerd |
|
| #symb of the problem (already decluttered and cleaned) |
|
| my $urlres = $cache->{$ResId.':problem'}; |
|
| |
|
| #------------------------ Compute the Average of Tries about one problem |
|
| my $Average = ($StdNo) ? $TotalTries/$StdNo : 0; |
|
| |
|
| $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___timestamp'}=time; |
|
| $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___stdno'}=$StdNo; |
|
| $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___avetries'}=$Average; |
|
| |
|
| #-------------------------------- Compute percentage of Wrong tries |
|
| my $Wrong = ( $StdNo ) ? 100 * ( $Incorrect / $StdNo ) : 0; |
|
| |
|
| #-------------------------------- Compute Standard Deviation |
|
| my $StdDev = 0; |
|
| if ( $StdNo > 1 ) { |
|
| for ( my $n = 0; $n < $StdNo; $n++ ) { |
|
| my $Dif = $StdLst[ $n ]-$Average; |
|
| $StdDev += $Dif*$Dif; |
|
| } |
|
| $StdDev /= ( $StdNo - 1 ); |
|
| $StdDev = sqrt( $StdDev ); |
|
| } |
|
| |
|
| #-------------------------------- Compute Degree of Difficulty |
|
| my $DoDiff = 0; |
|
| if( $TotalTries > 0 ) { |
|
| $DoDiff = 1 - ( ( $YES + $Override ) / $TotalTries ); |
|
| # $DoDiff = ($TotalTries)/($YES + $Override+ 0.1); |
|
| } |
|
| |
|
| $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___difficulty'}=$DoDiff; |
|
| |
|
| #-------------------------------- Compute the Skewness |
|
| my $Skewness = 0; |
|
| my $Sum = 0; |
|
| if ( $StdNo > 0 && $StdDev > 0 ) { |
|
| for ( my $n = 0; $n < $StdNo; $n++ ) { |
|
| my $Dif = $StdLst[ $n ]-$Average; |
|
| $Skewness += $Dif*$Dif*$Dif; |
|
| } |
|
| $Skewness /= $StdNo; |
|
| $Skewness /= $StdDev*$StdDev*$StdDev; |
|
| } |
|
| |
|
| #--------------------- Compute the Discrimination Factors |
|
| my ($Up1,$Up2)=split(/\:/,$upper->{$sequence.'@'.$pOrd}); |
|
| my ($Lw1,$Lw2)=split(/\:/,$lower->{$sequence.'@'.$pOrd}); |
|
| |
|
| my $Dis1 = $Up1 - $Lw1; |
|
| my $Dis2 = $Up2 - $Lw2; |
|
| my $_D1 = sprintf("%.2f", $Dis1); |
|
| my $_D2 = sprintf("%.2f", $Dis2); |
|
| |
|
| #----------------- Some restition in presenting the float numbers |
|
| my $Avg = sprintf( "%.2f", $Average ); |
|
| my $Wrng = sprintf( "%.1f", $Wrong ); |
|
| my $SD = sprintf( "%.1f", $StdDev ); |
|
| my $DoD = sprintf( "%.2f", $DoDiff ); |
|
| my $Sk = sprintf( "%.1f", $Skewness ); |
|
| my $join = $sequence.'@'.$pOrd.'&'.$Temp.'&'.$StdNo.'&'. |
|
| $TotalTries.'&'.$MxTries.'&'.$Avg.'&'. |
|
| $YES.'&'.$Override.'&'.$Wrng.'&'.$DoD.'&'. |
|
| $SD.'&'.$Sk.'&'.$_D1.'&'.$_D2.'&'. |
|
| $DiscNo.'&'.$Prob; |
|
| |
|
| $TempCache{'CacheTable:'.($p_count-1)}=$join; |
|
| |
|
| #6666666 |
|
| # $r->print('<br>'.$out.'&'.$DoD); |
|
| # print (OUT $out.'@'.$DoD.'&'); |
|
| #6666666 |
|
| |
|
| #check with Gerd |
|
| $urlres=~/^(\w+)\/(\w+)/; |
|
| if ($StdNo) { |
|
| &Apache::lonnet::put('resevaldata',\%storestats,$1,$2); |
|
| } |
|
| #-------------------------------- Row of statistical table |
|
| &TableRow($cache,$join,$cIdx,($p_count-1),$r,$color, |
|
| \%TempCache); |
|
| } |
|
| $TempCache{'ProblemCount'}=$p_count; |
|
| &CloseTable($cache,$r); |
|
| } |
|
| ### &Close_PrgWin(); |
|
| #6666666 |
|
| # close( OUT ); |
|
| #666666 |
|
| return \%TempCache; |
|
| } |
|
| |
|
| |
|
| sub CacheStatisticsTable { |
|
| my ($state,$cache,$headings,$r,$color)=@_; |
|
| my @list = (); |
|
| my %TempCache; |
|
| my %myHeader = reverse( %$headings ); |
|
| my $pos = $myHeader{$state}; |
|
| if ($pos > 0) {$pos++;} |
|
| my $p_count = $cache->{'ProblemCount'}; |
|
| |
|
| for ( my $k=0; $k<$p_count;$k++) { |
|
| my $key=$cache->{'CacheTable:'.$k}; |
|
| my @Temp=split(/\&/,$key); |
|
| $list[$k]=$Temp[$pos].'+'.$key; |
|
| } |
|
| |
|
| if ($pos>0) { |
|
| @list = sort OrderedSort (@list); |
|
| } else { |
|
| @list = sort (@list); |
|
| } |
} |
| my $cIdx=0; |
$row .= '</tr>'."\n"; |
| |
return $row; |
| if ( $pos == 0 ) { |
} |
| foreach my $sequence (split(':', $cache->{'orderedSequences'})) { |
|
| if($cache->{'ProblemStatisticsMaps'} ne 'All Maps' && |
|
| $cache->{'ProblemStatisticsMaps'} ne $cache->{$sequence.':title'}) { |
|
| next; |
|
| } |
|
| if ($cIdx==$p_count) { |
|
| return \%TempCache; |
|
| } |
|
| &CreateProblemStatisticsTableHeading($cache->{'DisplayFormat'}, |
|
| $cache->{$sequence.':source'}, |
|
| $cache->{$sequence.':title'}, |
|
| $headings,$r); |
|
| |
|
| my ($tar)=split(/\&/,$list[$cIdx]); |
|
| $tar=~s/\+//eg; |
|
| my ($SqOrd)=split(/\@/,$tar); |
|
| $sequence+=100; |
|
| while ($SqOrd==$sequence && $cIdx<$p_count) { |
|
| my($Pre, $Post) = split(/\+/,$list[$cIdx]); |
|
| &TableRow($cache,$Post,$cIdx,$cIdx,$r,$color,\%TempCache); |
|
| $cIdx++; |
|
| my ($tar)=split(/\&/,$list[$cIdx]); |
|
| $tar=~s/\+//eg; |
|
| ($SqOrd)=split(/\@/,$tar); |
|
| } |
|
| &CloseTable($cache,$r); |
|
| } |
|
| } |
|
| else { |
|
| &CreateProblemStatisticsTableHeading($cache->{'DisplayFormat'}, |
|
| 'Sorted by: ', |
|
| $headings->{$pos-1}, |
|
| $headings,$r); |
|
| for ( my $nIndex = 0; $nIndex < $p_count; $nIndex++ ) { |
|
| my($Pre, $Post) = split(/\+/,$list[$nIndex]); |
|
| &TableRow($cache,$Post,$nIndex,$nIndex,$r,$color,\%TempCache); |
|
| } |
|
| &CloseTable($cache,$r); |
|
| } |
|
| |
|
| return \%TempCache; |
|
| } |
|
| |
|
| |
|
| sub TableRow { |
|
| my ($cache,$Str,$Idx,$RealIdx,$r,$color,$GraphDat)=@_; |
|
| my($PrOrd,$Temp,$StdNo,$TotalTries,$MxTries,$Avg,$YES,$Override, |
|
| $Wrng,$DoD,$SD,$Sk,$_D1,$_D2,$DiscNo,$Prob)=split(/\&/,$Str); |
|
| my $Ptr; |
|
| if($cache->{'DisplayFormat'} eq 'Display CSV Format') { |
|
| my ($ResId,$Dummy)=split(/\*/,$Prob); |
|
| $Ptr="\n".'<br>'. |
|
| "\n".'"'.($RealIdx+1).'",'. |
|
| "\n".'"'.$cache->{$ResId.':title'}.$Dummy.'",'. |
|
| "\n".'"'.$cache->{$ResId.':source'}.'",'. |
|
| "\n".'"'.$StdNo.'",'. |
|
| "\n".'"'.$TotalTries.'",'. |
|
| "\n".'"'.$MxTries.'",'. |
|
| "\n".'"'.$Avg.'",'. |
|
| "\n".'"'.$YES.'",'. |
|
| "\n".'"'.$Override.'",'. |
|
| "\n".'"'.$Wrng.'",'. |
|
| "\n".'"'.$DoD.'",'. |
|
| "\n".'"'.$SD.'",'. |
|
| "\n".'"'.$Sk.'",'. |
|
| "\n".'"'.$_D1.'",'. |
|
| "\n".'"'.$_D2.'"'. |
|
| "\n".'"'.$DiscNo.'"'; |
|
| |
|
| $r->print("\n".$Ptr); |
#################################################### |
| |
#################################################### |
| |
## |
| |
## Plotting Routines |
| |
## |
| |
#################################################### |
| |
#################################################### |
| |
sub make_plot { |
| |
my ($r,$plot) = @_; |
| |
&compute_all_statistics($r); |
| |
&sort_data($env{'form.sortby'}); |
| |
if ($plot eq 'degrees') { |
| |
°rees_plot($r); |
| |
} elsif ($plot eq 'tries statistics') { |
| |
&tries_data_plot($r); |
| } else { |
} else { |
| $Ptr="\n".'<tr>'. |
&make_single_stat_plot($r,$plot); |
| "\n".'<td>'.($RealIdx+1).'</td>'. |
} |
| "\n".'<td>'.$Temp.'</td>'. |
return; |
| "\n".'<td bgcolor='.$color->{"yellow"}.'> '.$StdNo.'</td>'. |
|
| "\n".'<td bgcolor='.$color->{"yellow"}.'>'.$TotalTries.'</td>'. |
|
| "\n".'<td bgcolor='.$color->{"yellow"}.'>'.$MxTries.'</td>'. |
|
| "\n".'<td bgcolor='.$color->{"gb"}.'>'.$Avg.'</td>'. |
|
| "\n".'<td bgcolor='.$color->{"gb"}.'> '.$YES.'</td>'. |
|
| "\n".'<td bgcolor='.$color->{"gb"}.'> '.$Override.'</td>'. |
|
| "\n".'<td bgcolor='.$color->{"red"}.'> '.$Wrng.'</td>'. |
|
| "\n".'<td bgcolor='.$color->{"red"}.'> '.$DoD.'</td>'. |
|
| "\n".'<td bgcolor='.$color->{"green"}.'> '.$SD.'</td>'. |
|
| "\n".'<td bgcolor='.$color->{"green"}.'> '.$Sk.'</td>'. |
|
| "\n".'<td bgcolor='.$color->{"purple"}.'> '.$_D1.'</td>'. |
|
| "\n".'<td bgcolor='.$color->{"purple"}.'> '.$_D2.'</td>'. |
|
| "\n".'<td bgcolor='.$color->{"yellow"}.'> '.$DiscNo.'</td>'; |
|
| $r->print("\n".$Ptr.'</tr>' ); |
|
| } |
|
| $GraphDat->{'GraphGif:'.$RealIdx}=$DoD.':'.$Wrng; |
|
| } |
} |
| |
|
| |
sub make_single_stat_plot { |
| |
my ($r,$datafield) = @_; |
| |
# |
| |
my $title; my $yaxis; |
| |
foreach my $field (@Fields) { |
| |
next if ($field->{'name'} ne $datafield); |
| |
$title = &mt($field->{'long_title'}); |
| |
$yaxis = &mt($field->{'title'}); |
| |
last; |
| |
} |
| |
if ($title eq '' || $yaxis eq '') { |
| |
# datafield is something we do not know enough about to plot |
| |
$r->print('<p class="LC_warning">'. |
| |
&mt('Unable to plot the requested statistic.'). |
| |
'</p>'); |
| |
return; |
| |
} |
| |
# |
| |
# Build up the data sets to plot |
| |
my @Labels; |
| |
my @Data; |
| |
my $max = 1; |
| |
foreach my $data (@StatsArray) { |
| |
push(@Labels,$data->{'problem_num'}); |
| |
push(@Data,$data->{$datafield}); |
| |
if ($data->{$datafield}>$max) { |
| |
$max = $data->{$datafield}; |
| |
} |
| |
} |
| |
foreach (1,2,3,4,5,10,15,20,25,40,50,75,100,150,200,250,300,500,600,750, |
| |
1000,1500,2000,2500,3000,3500,4000,5000,7500,10000,15000,20000) { |
| |
if ($max <= $_) { |
| |
$max = $_; |
| |
last; |
| |
} |
| |
} |
| |
if ($max > 20000) { |
| |
$max = 10000*(int($max/10000)+1); |
| |
} |
| |
# |
| |
$r->print("<p>".&Apache::loncommon::DrawBarGraph($title, |
| |
&mt('Problem Number'), |
| |
$yaxis, |
| |
$max, |
| |
undef, # colors |
| |
\@Labels, |
| |
\@Data)."</p>\n"); |
| |
return; |
| |
} |
| |
|
| # For loading the colored table for display or un-colored for print |
sub degrees_plot { |
| sub setbgcolor { |
my ($r)=@_; |
| my $PrintTable=shift; |
my $count = scalar(@StatsArray); |
| my %color; |
my $width = 50 + 10*$count; |
| if ($PrintTable){ |
$width = 300 if ($width < 300); |
| $color{"gb"}="#FFFFFF"; |
my $height = 300; |
| $color{"red"}="#FFFFFF"; |
my $plot = ''; |
| $color{"yellow"}="#FFFFFF"; |
my $ymax = 0; |
| $color{"green"}="#FFFFFF"; |
my $ymin = 0; |
| $color{"purple"}="#FFFFFF"; |
my @Disc; my @Diff; my @Labels; |
| |
foreach my $data (@StatsArray) { |
| |
push(@Labels,$data->{'problem_num'}); |
| |
my $disc = $data->{'deg_of_disc'}; |
| |
my $diff = $data->{'deg_of_diff'}; |
| |
push(@Disc,$disc); |
| |
push(@Diff,$diff); |
| |
# |
| |
$ymin = $disc if ($ymin > $disc); |
| |
$ymin = $diff if ($ymin > $diff); |
| |
$ymax = $disc if ($ymax < $disc); |
| |
$ymax = $diff if ($ymax < $diff); |
| |
} |
| |
# |
| |
# Make sure we show relevant information. |
| |
if ($ymin < 0) { |
| |
if (abs($ymin) < 0.05) { |
| |
$ymin = 0; |
| |
} else { |
| |
$ymin = -1; |
| |
} |
| |
} |
| |
if ($ymax > 0) { |
| |
if (abs($ymax) < 0.05) { |
| |
$ymax = 0; |
| |
} else { |
| |
$ymax = 1; |
| |
} |
| |
} |
| |
# |
| |
my $xmax = $Labels[-1]; |
| |
if ($xmax > 50) { |
| |
if ($xmax % 10 != 0) { |
| |
$xmax = 10 * (int($xmax/10)+1); |
| |
} |
| } else { |
} else { |
| $color{"gb"}="#DDFFFF"; |
if ($xmax % 5 != 0) { |
| $color{"red"}="#FFDDDD"; |
$xmax = 5 * (int($xmax/5)+1); |
| $color{"yellow"}="#EEFFCC"; |
} |
| $color{"green"}="#DDFFDD"; |
} |
| $color{"purple"}="#FFDDFF"; |
# |
| } |
my $discdata .= '<data>'.join(',',@Labels).'</data>'.$/. |
| |
'<data>'.join(',',@Disc).'</data>'.$/; |
| return \%color; |
# |
| } |
my $diffdata .= '<data>'.join(',',@Labels).'</data>'.$/. |
| |
'<data>'.join(',',@Diff).'</data>'.$/; |
| sub ProblemStatisticsButtons { |
# |
| my ($displayFormat)=@_; |
my $title = &mt('Degree of Discrimination[_1]and Degree of Difficulty','\n'); |
| |
if ($xmax > 50) { |
| my $Ptr = '<tr><td></td><td align="left">'; |
$title = &mt('Degree of Discrimination and Degree of Difficulty'); |
| $Ptr .= '<input type="submit" name="DoDiffGraph" '; |
} |
| $Ptr .= 'value="DoDiff Graph" />'."\n"; |
my %lt = &Apache::lonlocal::texthash( |
| $Ptr .= ' '; |
'alttag' => 'Degree of Discrimination and Degree of Difficulty Plot', |
| $Ptr .= '<input type="submit" name="PercentWrongGraph" '; |
'xlabel' => 'Problem Number', |
| $Ptr .= 'value="%Wrong Graph" />'."\n"; |
); |
| $Ptr .= ' '; |
# |
| $Ptr .= '<input type="submit" name="DisplayCSVFormat" '; |
$plot=<<"END"; |
| if($displayFormat eq 'Display CSV Format') { |
<gnuplot |
| $Ptr .= 'value="Display Table Format" />'."\n"; |
texfont="10" |
| |
fgcolor="x000000" |
| |
plottype="Cartesian" |
| |
font="large" |
| |
grid="on" |
| |
align="center" |
| |
border="on" |
| |
transparent="on" |
| |
alttag="$lt{'alttag'}" |
| |
samples="100" |
| |
bgcolor="xffffff" |
| |
height="$height" |
| |
width="$width"> |
| |
<key |
| |
pos="top right" |
| |
title="" |
| |
box="off" /> |
| |
<title>$title</title> |
| |
<axis xmin="0" ymin="$ymin" xmax="$xmax" ymax="$ymax" color="x000000" /> |
| |
<xlabel>$lt{'xlabel'}</xlabel> |
| |
<curve |
| |
linestyle="linespoints" |
| |
name="DoDisc" |
| |
pointtype="0" |
| |
color="x000000"> |
| |
$discdata |
| |
</curve> |
| |
<curve |
| |
linestyle="linespoints" |
| |
name="DoDiff" |
| |
pointtype="0" |
| |
color="xFF0000"> |
| |
$diffdata |
| |
</curve> |
| |
</gnuplot> |
| |
END |
| |
my $plotresult = |
| |
'<p>'.&Apache::lonxml::xmlparse($r,'web',$plot).'</p>'.$/; |
| |
$r->print($plotresult); |
| |
return; |
| |
} |
| |
|
| |
sub tries_data_plot { |
| |
my ($r)=@_; |
| |
my $count = scalar(@StatsArray); |
| |
my $width = 50 + 10*$count; |
| |
$width = 300 if ($width < 300); |
| |
my $height = 300; |
| |
my $plot = ''; |
| |
my @STD; my @Mean; my @Max; my @Min; |
| |
my @Labels; |
| |
my $ymax = 5; |
| |
foreach my $data (@StatsArray) { |
| |
my $max = $data->{'mean_tries'} + $data->{'std_tries'}; |
| |
$ymax = $max if ($ymax < $max); |
| |
$ymax = $max if ($ymax < $max); |
| |
push(@Labels,$data->{'problem_num'}); |
| |
push(@STD,$data->{'std_tries'}); |
| |
push(@Mean,$data->{'mean_tries'}); |
| |
} |
| |
# |
| |
# Make sure we show relevant information. |
| |
my $xmax = $Labels[-1]; |
| |
if ($xmax > 50) { |
| |
if ($xmax % 10 != 0) { |
| |
$xmax = 10 * (int($xmax/10)+1); |
| |
} |
| } else { |
} else { |
| $Ptr .= 'value="Display CSV Format" />'."\n"; |
if ($xmax % 5 != 0) { |
| |
$xmax = 5 * (int($xmax/5)+1); |
| |
} |
| } |
} |
| $Ptr .= '</td></tr>'; |
$ymax = int($ymax)+1+2; |
| |
# |
| |
my $std_data .= '<data>'.join(',',@Labels).'</data>'.$/. |
| |
'<data>'.join(',',@Mean).'</data>'.$/; |
| |
# |
| |
my $std_error_data .= '<data>'.join(',',@Labels).'</data>'.$/. |
| |
'<data>'.join(',',@Mean).'</data>'.$/. |
| |
'<data>'.join(',',@STD).'</data>'.$/; |
| |
# |
| |
my $title = &mt('Mean and S.D. of Tries'); |
| |
if ($xmax > 30) { |
| |
$title = &mt('Mean and Standard Deviation of Tries'); |
| |
} |
| |
# |
| |
my %lt = &Apache::lonlocal::texthash( |
| |
'alttag' => 'Mean and S.D of Tries Plot', |
| |
'xlabel' => 'Problem Number', |
| |
'ylabel' => 'Number of Tries', |
| |
); |
| |
$plot=<<"END"; |
| |
<gnuplot |
| |
texfont="10" |
| |
fgcolor="x000000" |
| |
plottype="Cartesian" |
| |
font="large" |
| |
grid="on" |
| |
align="center" |
| |
border="on" |
| |
transparent="on" |
| |
alttag="$lt{'alttag'}" |
| |
samples="100" |
| |
bgcolor="xffffff" |
| |
height="$height" |
| |
width="$width"> |
| |
<title>$title</title> |
| |
<axis xmin="0" ymin="0" xmax="$xmax" ymax="$ymax" color="x000000" /> |
| |
<xlabel>$lt{'xlabel'}</xlabel> |
| |
<ylabel>$lt{'ylabel'}</ylabel> |
| |
<curve |
| |
linestyle="yerrorbars" |
| |
name="S.D. Tries" |
| |
pointtype="1" |
| |
color="x666666"> |
| |
$std_error_data |
| |
</curve> |
| |
<curve |
| |
linestyle="points" |
| |
name="Mean Tries" |
| |
pointtype="1" |
| |
color="xCC4444"> |
| |
$std_data |
| |
</curve> |
| |
</gnuplot> |
| |
END |
| |
my $plotresult = |
| |
'<p>'.&Apache::lonxml::xmlparse($r,'web',$plot).'</p>'.$/; |
| |
$r->print($plotresult); |
| |
return; |
| |
} |
| |
|
| return $Ptr; |
sub plot_dropdown { |
| |
my $current = ''; |
| |
my $title; |
| |
# |
| |
if (defined($env{'form.plot'})) { |
| |
$current = $env{'form.plot'}; |
| |
} |
| |
# |
| |
my @Additional_Plots = ( |
| |
{ graphable=>'yes', |
| |
name => 'degrees', |
| |
title => 'Difficulty Indexes' }, |
| |
{ graphable=>'yes', |
| |
name => 'tries statistics', |
| |
title => 'Tries Statistics' }); |
| |
# |
| |
my $Str= "\n".'<select name="plot" size="1">'; |
| |
$Str .= '<option name="none"></option>'."\n"; |
| |
$Str .= '<option name="none2">'.&mt('none').'</option>'."\n"; |
| |
foreach my $field (@Additional_Plots,@Fields) { |
| |
if (! exists($field->{'graphable'}) || |
| |
$field->{'graphable'} ne 'yes') { |
| |
next; |
| |
} |
| |
$Str .= '<option value="'.$field->{'name'}.'"'; |
| |
if ($field->{'name'} eq $current) { |
| |
$Str .= ' selected="selected"'; |
| |
} |
| |
$title = &mt($field->{'long_title'}); |
| |
$title = &mt($field->{'title'}) if (!$title); |
| |
$Str.= '>'.$title.'</option>'."\n"; |
| |
} |
| |
$Str .= '</select>'."\n"; |
| |
return $Str; |
| } |
} |
| |
|
| sub ProblemStatisticsLegend { |
############################################### |
| my $Ptr = ''; |
############################################### |
| $Ptr = '<table border="0">'; |
## |
| $Ptr .= '<tr><td>'; |
## Excel output routines |
| $Ptr .= '<b>#Stdnts</b></td>'; |
## |
| $Ptr .= '<td>Total Number of Students opened the problem.'; |
############################################### |
| $Ptr .= '</td></tr><tr><td>'; |
############################################### |
| $Ptr .= '<b>Tries</b></td>'; |
sub Excel_output { |
| $Ptr .= '<td>Total Number of Tries for solving the problem.'; |
my ($r) = @_; |
| $Ptr .= '</td></tr><tr><td>'; |
$r->print('<h2>'.&mt('Preparing Excel Spreadsheet').'</h2>'); |
| $Ptr .= '<b>Mod</b></td>'; |
## |
| $Ptr .= '<td>Maximunm Number of Tries for solving the problem.'; |
## Compute the statistics |
| $Ptr .= '</td></tr><tr><td>'; |
&compute_all_statistics($r); |
| $Ptr .= '<b>Mean</b></td>'; |
my $c = $r->connection; |
| $Ptr .= '<td>Average Number of the tries. [ Tries / #Stdnts ]'; |
return if ($c->aborted()); |
| $Ptr .= '</td></tr><tr><td>'; |
# |
| $Ptr .= '<b>#YES</b></td>'; |
my ($starttime,$endtime) = &Apache::lonstathelpers::get_time_limits(); |
| $Ptr .= '<td>Number of students solved the problem correctly.'; |
## |
| $Ptr .= '</td></tr><tr><td>'; |
## Create the excel workbook |
| $Ptr .= '<b>#yes</b></td>'; |
my ($excel_workbook,$filename,$format) = |
| $Ptr .= '<td>Number of students solved the problem by override.'; |
&Apache::loncommon::create_workbook($r); |
| $Ptr .= '</td></tr><tr><td>'; |
return if (! defined($excel_workbook)); |
| $Ptr .= '<b>%Wrng</b></td>'; |
# |
| $Ptr .= '<td>Percentage of students tried to solve the problem '; |
# Add a worksheet |
| $Ptr .= 'but still incorrect. [ 100*((#Stdnts-(#YES+#yes))/#Stdnts) ]'; |
my $sheetname = $env{'course.'.$env{'request.course.id'}.'.description'}; |
| $Ptr .= '</td></tr><tr><td>'; |
if (length($sheetname) > 31) { |
| $Ptr .= '<b>DoDiff</b></td>'; |
$sheetname = substr($sheetname,0,31); |
| $Ptr .= '<td>Degree of Difficulty of the problem. '; |
} |
| $Ptr .= '[ 1 - ((#YES+#yes) / Tries) ]'; |
my $excel_sheet = $excel_workbook->addworksheet( |
| $Ptr .= '</td></tr><tr><td>'; |
&Apache::loncommon::clean_excel_name($sheetname)); |
| $Ptr .= '<b>S.D.</b></td>'; |
## |
| $Ptr .= '<td>Standard Deviation of the tries. '; |
## Begin creating excel sheet |
| $Ptr .= '[ sqrt(sum((Xi - Mean)^2)) / (#Stdnts-1) '; |
## |
| $Ptr .= 'where Xi denotes every student\'s tries ]'; |
my ($rows_output,$cols_output) = (0,0); |
| $Ptr .= '</td></tr><tr><td>'; |
# |
| $Ptr .= '<b>Skew.</b></td>'; |
# Put the course description in the header |
| $Ptr .= '<td>Skewness of the students tries.'; |
$excel_sheet->write($rows_output,$cols_output++, |
| $Ptr .= '[(sqrt( sum((Xi - Mean)^3) / #Stdnts)) / (S.D.^3)]'; |
$env{'course.'.$env{'request.course.id'}.'.description'}, |
| $Ptr .= '</td></tr><tr><td>'; |
$format->{'h1'}); |
| $Ptr .= '<b>Dis.F.</b></td>'; |
$cols_output += 3; |
| $Ptr .= '<td>Discrimination Factor: A Standard for evaluating the '; |
# |
| $Ptr .= 'problem according to a Criterion<br>'; |
# Put a description of the sections listed |
| $Ptr .= '<b>[Applied Criterion in %27 Upper Students - '; |
my $sectionstring = ''; |
| $Ptr .= 'Applied the same Criterion in %27 Lower Students]</b><br>'; |
$excel_sheet->write($rows_output,$cols_output++, |
| $Ptr .= '<b>1st Criterion</b> for Sorting the Students: '; |
&Apache::lonstatistics::section_and_enrollment_description('plaintext'), |
| $Ptr .= '<b>Sum of Partial Credit Awarded / Total Number of Tries</b><br>'; |
$format->{'h3'}); |
| $Ptr .= '<b>2nd Criterion</b> for Sorting the Students: '; |
$cols_output += scalar(&Apache::lonstatistics::get_selected_sections()); |
| $Ptr .= '<b>Total number of Correct Answers / Total Number of Tries</b>'; |
$cols_output += scalar(&Apache::lonstatistics::get_selected_groups()); |
| $Ptr .= '</td></tr>'; |
# |
| $Ptr .= '<tr><td><b>Disc.</b></td>'; |
# Time restrictions |
| $Ptr .= '<td>Number of Students had at least one discussion.'; |
my $time_string; |
| $Ptr .= '</td></tr></table>'; |
if (defined($starttime)) { |
| |
# call localtime but not lonlocal:locallocaltime because excel probably |
| return $Ptr; |
# cannot handle localized text. Probably. |
| } |
$time_string .= 'Data collected from '.localtime($time_string); |
| |
if (defined($endtime)) { |
| #------- Processing upperlist and lowerlist according to each problem |
$time_string .= ' to '.localtime($endtime); |
| sub ProcessDiscriminant { |
} |
| my ($List,$r) = @_; |
$time_string .= '.'; |
| my @sortedList = sort (@$List); |
} elsif (defined($endtime)) { |
| my $Count = scalar @sortedList; |
# See note above about lonlocal:locallocaltime |
| my $Problem; |
$time_string .= 'Data collected before '.localtime($endtime).'.'; |
| my @Dis; |
} |
| my $Slvd=0; |
if (defined($time_string)) { |
| my $tmp; |
$excel_sheet->write($rows_output,$cols_output++,$time_string); |
| my $Sum1=0; |
$cols_output+= 5; |
| my $Sum2=0; |
} |
| my $nIndex=0; |
# |
| my $nStudent=0; |
# Put the date in there too |
| my %Proc=undef; |
$excel_sheet->write($rows_output,$cols_output++, |
| while ($nIndex<$Count) { |
'Compiled on '.localtime(time)); |
| # $r->print("<br> $nIndex) $sortedList[$nIndex]"); |
# |
| ($Problem,$tmp)=split(/\=/,$sortedList[$nIndex]); |
$rows_output++; |
| @Dis=split(/\+/,$tmp); |
$cols_output=0; |
| my $Temp = $Problem; |
## |
| do { |
## Sequence Statistics |
| $nIndex++; |
## |
| $nStudent++; |
&write_headers($excel_sheet,$format,\$rows_output,\$cols_output, |
| $Sum1 += $Dis[0]; |
\@SeqFields); |
| $Sum2 += $Dis[1]; |
foreach my $seq (@sequences) { |
| ($Problem,$tmp)=split(/\=/,$sortedList[$nIndex]); |
my $data = $SeqStat{$seq->symb}; |
| @Dis=split(/\+/,$tmp); |
$cols_output=0; |
| } while ( $Problem eq $Temp && $nIndex < $Count ); |
foreach my $field (@SeqFields) { |
| $Proc{$Temp}=($Sum1/$nStudent).':'.($Sum2/$nStudent); |
next if ($field->{'selected'} ne 'yes'); |
| # $r->print("<br> $nIndex) $Temp --> ($nStudent) $Proc{$Temp}"); |
my $fieldformat = undef; |
| $Sum1=0; |
if (exists($field->{'excel_format'})) { |
| $Sum2=0; |
$fieldformat = $format->{$field->{'excel_format'}}; |
| $nStudent=0; |
} |
| } |
$excel_sheet->write($rows_output,$cols_output++, |
| |
$data->{$field->{'name'}},$fieldformat); |
| return %Proc; |
} |
| } |
$rows_output++; |
| |
$cols_output=0; |
| #------- Creating Discimination factor |
} |
| sub Discriminant { |
## |
| my ($discriminant,$r)=@_; |
## Resource Statistics |
| my @discriminantKeys=keys(%$discriminant); |
## |
| my $Count = scalar @discriminantKeys; |
$rows_output++; |
| |
$cols_output=0; |
| my $UpCnt = int(0.27*$Count); |
&write_headers($excel_sheet,$format,\$rows_output,\$cols_output, |
| my $low=0; |
\@Fields); |
| my $up=$Count-$UpCnt; |
# |
| my @UpList=(); |
foreach my $data (@StatsArray) { |
| my @LowList=(); |
$cols_output=0; |
| |
foreach my $field (@Fields) { |
| $Count=0; |
next if ($field->{'selected'} ne 'yes'); |
| foreach my $key (sort(@discriminantKeys)) { |
next if ($field->{'name'} eq 'problem_num'); |
| $Count++; |
my $fieldformat = undef; |
| if($low < $UpCnt || $Count > $up) { |
if (exists($field->{'excel_format'})) { |
| $low++; |
$fieldformat = $format->{$field->{'excel_format'}}; |
| my $str=$discriminant->{$key}; |
|
| foreach(split(/\&/,$str)){ |
|
| if($_) { |
|
| if($low<$UpCnt) { push(@LowList,$_); } |
|
| else { push(@UpList,$_); } |
|
| } |
|
| } |
} |
| |
$excel_sheet->write($rows_output,$cols_output++, |
| |
$data->{$field->{'name'}},$fieldformat); |
| |
} |
| |
$rows_output++; |
| |
$cols_output=0; |
| |
} |
| |
# |
| |
$excel_workbook->close(); |
| |
# |
| |
# Tell the user where to get their excel file |
| |
$r->print('<br />'. |
| |
'<a href="'.$filename.'">'. |
| |
&mt('Your Excel Spreadsheet').'</a>'."\n"); |
| |
$r->rflush(); |
| |
return; |
| |
} |
| |
|
| |
## |
| |
## &write_headers |
| |
## |
| |
sub write_headers { |
| |
my ($excel_sheet,$format,$rows_output,$cols_output,$Fields) = @_; |
| |
## |
| |
## First the long titles |
| |
foreach my $field (@{$Fields}) { |
| |
next if ($field->{'name'} eq 'problem_num'); |
| |
next if ($field->{'selected'} ne 'yes'); |
| |
if (exists($field->{'long_title'})) { |
| |
$excel_sheet->write($$rows_output,${$cols_output}, |
| |
$field->{'long_title'}, |
| |
$format->{'bold'}); |
| |
} else { |
| |
$excel_sheet->write($$rows_output,${$cols_output},''); |
| |
} |
| |
${$cols_output}+= 1; |
| |
} |
| |
${$cols_output} =0; |
| |
${$rows_output}+=1; |
| |
## |
| |
## Then the short titles |
| |
foreach my $field (@{$Fields}) { |
| |
next if ($field->{'selected'} ne 'yes'); |
| |
next if ($field->{'name'} eq 'problem_num'); |
| |
# Use english for excel as I am not sure how well excel handles |
| |
# other character sets.... |
| |
$excel_sheet->write($$rows_output,$$cols_output, |
| |
$field->{'title'}, |
| |
$format->{'bold'}); |
| |
$$cols_output+=1; |
| |
} |
| |
${$cols_output} =0; |
| |
${$rows_output}+=1; |
| |
return; |
| |
} |
| |
|
| |
################################################## |
| |
################################################## |
| |
## |
| |
## Statistics Gathering and Manipulation Routines |
| |
## |
| |
################################################## |
| |
################################################## |
| |
sub compute_statistics_on_sequence { |
| |
my ($seq) = @_; |
| |
my @Data; |
| |
foreach my $res (&Apache::lonstathelpers::get_resources($navmap,$seq)) { |
| |
foreach my $part (@{$res->parts}) { |
| |
next if (($res->is_survey($part)) || ($res->is_anonsurvey($part))) ; |
| |
# |
| |
# This is where all the work happens |
| |
my $data = &get_statistics($seq,$res,$part,scalar(@StatsArray)+1); |
| |
push (@Data,$data); |
| |
push (@StatsArray,$data); |
| } |
} |
| } |
} |
| my %DisUp = &ProcessDiscriminant(\@UpList,$r); |
return @Data; |
| my %DisLow = &ProcessDiscriminant(\@LowList,$r); |
} |
| |
|
| return (\%DisUp, \%DisLow); |
sub compute_all_statistics { |
| } |
my ($r) = @_; |
| |
if (@StatsArray > 0) { |
| |
# Assume we have already computed the statistics |
| |
return; |
| |
} |
| |
my $c = $r->connection; |
| |
foreach my $seq (@sequences) { |
| |
last if ($c->aborted); |
| |
&compute_sequence_statistics($seq); |
| |
&compute_statistics_on_sequence($seq); |
| |
} |
| |
} |
| |
|
| #---- END Problem Statistics Web Page ---------------------------------------- |
sub sort_data { |
| |
my ($sortkey) = @_; |
| |
return if (! @StatsArray); |
| |
# |
| |
# Sort the data |
| |
my $sortby = undef; |
| |
foreach my $field (@Fields) { |
| |
if ($sortkey eq $field->{'name'}) { |
| |
$sortby = $field->{'name'}; |
| |
} |
| |
} |
| |
if (! defined($sortby) || $sortby eq '' || $sortby eq 'problem_num') { |
| |
$sortby = 'container'; |
| |
} |
| |
if ($sortby ne 'container') { |
| |
# $sortby is already defined, so we can charge ahead |
| |
if ($sortby =~ /^(title|part)$/i) { |
| |
# Alpha comparison |
| |
@StatsArray = sort { |
| |
lc($a->{$sortby}) cmp lc($b->{$sortby}) || |
| |
lc($a->{'title'}) cmp lc($b->{'title'}) || |
| |
lc($a->{'part'}) cmp lc($b->{'part'}); |
| |
} @StatsArray; |
| |
} else { |
| |
# Numerical comparison |
| |
@StatsArray = sort { |
| |
my $retvalue = 0; |
| |
if ($b->{$sortby} eq 'nan') { |
| |
if ($a->{$sortby} ne 'nan') { |
| |
$retvalue = -1; |
| |
} else { |
| |
$retvalue = 0; |
| |
} |
| |
} |
| |
if ($a->{$sortby} eq 'nan') { |
| |
if ($b->{$sortby} ne 'nan') { |
| |
$retvalue = 1; |
| |
} |
| |
} |
| |
if ($retvalue eq '0') { |
| |
$retvalue = $b->{$sortby} <=> $a->{$sortby} || |
| |
lc($a->{'title'}) <=> lc($b->{'title'}) || |
| |
lc($a->{'part'}) <=> lc($b->{'part'}); |
| |
} |
| |
$retvalue; |
| |
} @StatsArray; |
| |
} |
| |
} |
| |
# |
| |
# Renumber the data set |
| |
my $count; |
| |
foreach my $data (@StatsArray) { |
| |
$data->{'problem_num'} = ++$count; |
| |
} |
| |
return; |
| |
} |
| |
|
| #---- Problem Statistics Graph Web Page -------------------------------------- |
######################################################## |
| |
######################################################## |
| |
|
| # ------------------------------------------- Prepare data for Graphical chart |
=pod |
| |
|
| sub BuildGraphicChart { |
=item &get_statistics() |
| my ($ylab,$r,$cacheDB)=@_; |
|
| my %cache; |
|
| my $Col; |
|
| my $data=''; |
|
| my $count = 0; |
|
| my $Max = 0; |
|
| |
|
| unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER,0640)) { |
Wrapper routine from the call to loncoursedata::get_problem_statistics. |
| return '<html><body>Unable to tie database.</body></html>'; |
Calls lonstathelpers::get_time_limits() to limit the data set by time |
| } |
and &compute_discrimination_factor |
| |
|
| my $p_count = $cache{'ProblemCount'}; |
Inputs: $sequence, $resource, $part, $problem_num |
| |
|
| |
Returns: Hash reference with statistics data from |
| |
loncoursedata::get_problem_statistics. |
| |
|
| |
=cut |
| |
|
| |
######################################################## |
| |
######################################################## |
| |
sub get_statistics { |
| |
my ($sequence,$resource,$part,$problem_num) = @_; |
| |
# |
| |
my ($starttime,$endtime) = &Apache::lonstathelpers::get_time_limits(); |
| |
my $symb = $resource->symb; |
| |
my $courseid = $env{'request.course.id'}; |
| |
# |
| |
my $data = &Apache::loncoursedata::get_problem_statistics |
| |
([&Apache::lonstatistics::get_selected_sections()], |
| |
[&Apache::lonstatistics::get_selected_groups()], |
| |
$Apache::lonstatistics::enrollment_status, |
| |
$symb,$part,$courseid,$starttime,$endtime); |
| |
$data->{'symb'} = $symb; |
| |
$data->{'part'} = $part; |
| |
$data->{'problem_num'} = $problem_num; |
| |
$data->{'container'} = $sequence->compTitle; |
| |
$data->{'title'} = $resource->compTitle; |
| |
$data->{'title.link'} = $resource->src.'?symb='. |
| |
&escape($resource->symb); |
| |
# |
| |
if ($SelectedFields{'deg_of_disc'}) { |
| |
$data->{'deg_of_disc'} = |
| |
&compute_discrimination_factor($resource,$part,$sequence); |
| |
} |
| |
# |
| |
# Store in metadata if computations were done for all students |
| |
if ($data->{'num_students'} > 1) { |
| |
my @Sections = &Apache::lonstatistics::get_selected_sections(); |
| |
my $sections = '"'.join(' ',@Sections).'"'; |
| |
$sections =~ s/&+/_/g; # Ensure no special characters |
| |
$data->{'sections'}=$sections; |
| |
$data->{'course'} = $env{'request.course.id'}; |
| |
my $urlres=(&Apache::lonnet::decode_symb($resource->symb))[2]; |
| |
my %storestats = |
| |
&LONCAPA::lonmetadata::dynamic_metadata_storage($data); |
| |
my ($dom,$user) = ($urlres=~m{^($LONCAPA::domain_re)/($LONCAPA::username_re)}); |
| |
&Apache::lonnet::put('nohist_resevaldata',\%storestats,$dom,$user); |
| |
} |
| |
# |
| |
$data->{'tries_per_correct'} = $data->{'tries'} / |
| |
($data->{'num_solved'}+0.1); |
| |
# |
| |
# Get the due date for research purposes (commented out most of the time) |
| |
# my $duedate = &Apache::lonnet::EXT('resource.'.$part.'.duedate',$symb);; |
| |
# my $opendate = &Apache::lonnet::EXT('resource.'.$part.'.opendate',$symb); |
| |
# my $maxtries = &Apache::lonnet::EXT('resource.'.$part.'.maxtries',$symb); |
| |
# my $hinttries = &Apache::lonnet::EXT('resource.'.$part.'.hinttries',$symb); |
| |
my $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',$symb); |
| |
$data->{'weight'} = $weight; |
| |
# $data->{'duedate'} = $duedate; |
| |
# $data->{'opendate'} = $opendate; |
| |
# $data->{'maxtries'} = $maxtries; |
| |
# $data->{'hinttries'} = $hinttries; |
| |
# $data->{'resptypes'} = join(',',@{$resource->{'partdata'}->{$part}->{'ResponseTypes'}}); |
| |
return $data; |
| |
} |
| |
|
| for ( my $k=0; $k<$p_count;$k++) { |
############################################### |
| my @Temp=split(/\:/,$cache{'GraphGif:'.$k}); |
############################################### |
| my $inf = $Temp[$Col]; |
|
| if ( $Max < $inf ) {$Max = $inf;} |
=pod |
| $data .= $inf.','; |
|
| $count++; |
|
| } |
|
| untie(%cache); |
|
| # $r->print("<br>count=$p_count >>data= $data"); |
|
| |
|
| if ( $Max > 1 ) { |
=item &compute_discrimination_factor() |
| $Max += (10 - $Max % 10); |
|
| $Max = int($Max); |
|
| } else { $Max = 1; } |
|
| |
|
| my $cid=$ENV{'request.course.id'}; |
Inputs: $Resource, $Sequence |
| |
|
| if ( $ylab eq 'DoDiff Graph' ) { |
Returns: integer between -1 and 1 |
| $ylab = 'Degree-of-Difficulty'; |
|
| $Col = 0; |
=cut |
| |
|
| |
############################################### |
| |
############################################### |
| |
sub compute_discrimination_factor { |
| |
my ($resource,$part,$seq) = @_; |
| |
my $symb = $resource->symb; |
| |
my @Resources; |
| |
foreach my $res (&Apache::lonstathelpers::get_resources($navmap,$seq)){ |
| |
next if ($res->symb eq $symb); |
| |
push (@Resources,$res->symb); |
| |
} |
| |
# |
| |
# rank |
| |
my ($starttime,$endtime) = &Apache::lonstathelpers::get_time_limits(); |
| |
my $ranking = |
| |
&Apache::loncoursedata::rank_students_by_scores_on_resources |
| |
(\@Resources, |
| |
[&Apache::lonstatistics::get_selected_sections()], |
| |
[&Apache::lonstatistics::get_selected_groups()], |
| |
$Apache::lonstatistics::enrollment_status,undef, |
| |
$starttime,$endtime, $symb); |
| |
# |
| |
# compute their percent scores on the problems in the sequence, |
| |
my $number_to_grab = int(scalar(@{$ranking})/4); |
| |
my $num_students = scalar(@{$ranking}); |
| |
my @BottomSet = map { $_->[&Apache::loncoursedata::RNK_student()]; |
| |
} @{$ranking}[0..$number_to_grab]; |
| |
my @TopSet = |
| |
map { |
| |
$_->[&Apache::loncoursedata::RNK_student()]; |
| |
} @{$ranking}[-$number_to_grab..0]; |
| |
if (! @BottomSet || (@BottomSet == 1 && $BottomSet[0] eq '') || |
| |
! @TopSet || (@TopSet == 1 && $TopSet[0] eq '')) { |
| |
return 'nan'; |
| |
} |
| |
my ($bottom_sum,$bottom_max) = |
| |
&Apache::loncoursedata::get_sum_of_scores($symb,$part,\@BottomSet, |
| |
undef,$starttime,$endtime); |
| |
my ($top_sum,$top_max) = |
| |
&Apache::loncoursedata::get_sum_of_scores($symb,$part,\@TopSet, |
| |
undef,$starttime,$endtime); |
| |
my $deg_of_disc; |
| |
if ($top_max == 0 || $bottom_max==0) { |
| |
$deg_of_disc = 'nan'; |
| } else { |
} else { |
| $ylab = 'Wrong-Percentage'; |
$deg_of_disc = ($top_sum/$top_max) - ($bottom_sum/$bottom_max); |
| $Col = 1; |
|
| } |
} |
| my $Course = $ENV{'course.'.$cid.'.description'}; |
#&Apache::lonnet::logthis(' '.$top_sum.'/'.$top_max. |
| $Course =~ s/\ /"_"/eg; |
# ' - '.$bottom_sum.'/'.$bottom_max); |
| my $GData=$Course.'&'.'Problems#'.'&'.$ylab.'&'. |
return $deg_of_disc; |
| $Max.'&'.$count.'&'.$data; |
} |
| |
|
| $r->print('<IMG src="/cgi-bin/graph.gif?'.$GData.'" />'); |
|
| |
|
| |
############################################### |
| |
############################################### |
| |
## |
| |
## Compute KR-21 |
| |
## |
| |
## To compute KR-21, you need the following information: |
| |
## |
| |
## K=the number of items in your test |
| |
## M=the mean score on the test |
| |
## s=the standard deviation of the scores on your test |
| |
## |
| |
## then: |
| |
## |
| |
## KR-21 rk= [K/(K-1)] * [1- (M*(K-M))/(K*s^2))] |
| |
## |
| |
############################################### |
| |
############################################### |
| |
sub compute_sequence_statistics { |
| |
my ($seq) = @_; |
| |
my $symb = $seq->symb; |
| |
my @Resources; |
| |
my $part_count; |
| |
foreach my $res (&Apache::lonstathelpers::get_resources($navmap,$seq)) { |
| |
push (@Resources,$res->symb); |
| |
$part_count += scalar(@{$res->parts}); |
| |
} |
| |
my ($starttime,$endtime) = &Apache::lonstathelpers::get_time_limits(); |
| |
# |
| |
# First compute statistics based on student scores |
| |
my ($smin,$smax,$sMean,$sSTD,$scount,$sMAX) = |
| |
&Apache::loncoursedata::score_stats |
| |
([&Apache::lonstatistics::get_selected_sections()], |
| |
[&Apache::lonstatistics::get_selected_groups()], |
| |
$Apache::lonstatistics::enrollment_status, |
| |
\@Resources,$starttime,$endtime,undef); |
| |
$SeqStat{$symb}->{'title'} = $seq->compTitle; |
| |
$SeqStat{$symb}->{'scoremax'} = $smax; |
| |
$SeqStat{$symb}->{'scoremin'} = $smin; |
| |
$SeqStat{$symb}->{'scoremean'} = $sMean; |
| |
$SeqStat{$symb}->{'scorestd'} = $sSTD; |
| |
$SeqStat{$symb}->{'scorecount'} = $scount; |
| |
$SeqStat{$symb}->{'max_possible'} = $sMAX; |
| |
# |
| |
# Compute statistics based on the number of correct problems |
| |
# 'correct' is taken to mean |
| |
my ($cmin,$cmax,$cMean,$cSTD,$ccount)= |
| |
&Apache::loncoursedata::count_stats |
| |
([&Apache::lonstatistics::get_selected_sections()], |
| |
[&Apache::lonstatistics::get_selected_groups()], |
| |
$Apache::lonstatistics::enrollment_status, |
| |
\@Resources,$starttime,$endtime,undef); |
| |
my $K = $part_count; |
| |
my $kr_21; |
| |
if ($K > 1 && $cSTD > 0) { |
| |
$kr_21 = ($K/($K-1)) * (1 - $cMean*($K-$cMean)/($K*$cSTD**2)); |
| |
} else { |
| |
$kr_21 = 'nan'; |
| |
} |
| |
$SeqStat{$symb}->{'countmax'} = $cmax; |
| |
$SeqStat{$symb}->{'countmin'} = $cmin; |
| |
$SeqStat{$symb}->{'countstd'} = $cSTD; |
| |
$SeqStat{$symb}->{'countmean'} = $cMean; |
| |
$SeqStat{$symb}->{'count'} = $ccount; |
| |
$SeqStat{$symb}->{'items'} = $K; |
| |
$SeqStat{$symb}->{'KR-21'}=$kr_21; |
| return; |
return; |
| } |
} |
| |
|
| |
|
| |
|
| |
=pod |
| |
|
| |
=item ProblemStatisticsLegend |
| |
|
| |
=over 4 |
| |
|
| |
=item #Stdnts |
| |
Total number of students attempted the problem. |
| |
|
| |
=item Tries |
| |
Total number of tries for solving the problem. |
| |
|
| |
=item Max Tries |
| |
Largest number of tries for solving the problem by a student. |
| |
|
| |
=item Mean |
| |
Average number of tries. [ Tries / #Stdnts ] |
| |
|
| |
=item #YES |
| |
Number of students solved the problem correctly. |
| |
|
| |
=item #yes |
| |
Number of students solved the problem by override. |
| |
|
| |
=item %Wrong |
| |
Percentage of students who tried to solve the problem |
| |
but is still incorrect. [ 100*((#Stdnts-(#YES+#yes))/#Stdnts) ] |
| |
|
| |
=item DoDiff |
| |
Degree of Difficulty of the problem. |
| |
[ 1 - ((#YES+#yes) / Tries) ] |
| |
|
| |
=item S.D. |
| |
Standard Deviation of the tries. |
| |
[ sqrt(sum((Xi - Mean)^2)) / (#Stdnts-1) |
| |
where Xi denotes every student\'s tries ] |
| |
|
| |
=item Skew. |
| |
Skewness of the students tries. |
| |
[(sqrt( sum((Xi - Mean)^3) / #Stdnts)) / (S.D.^3)] |
| |
|
| |
=item Dis.F. |
| |
Discrimination Factor: A Standard for evaluating the |
| |
problem according to a Criterion<br> |
| |
|
| |
=item [Criterion to group students into %27 Upper Students - |
| |
and %27 Lower Students] |
| |
1st Criterion for Sorting the Students: |
| |
Sum of Partial Credit Awarded / Total Number of Tries |
| |
2nd Criterion for Sorting the Students: |
| |
Total number of Correct Answers / Total Number of Tries |
| |
|
| |
=item Disc. |
| |
Number of Students had at least one discussion. |
| |
|
| |
=back |
| |
|
| |
=cut |
| |
|
| |
############################################################ |
| |
############################################################ |
| |
|
| 1; |
1; |
| __END__ |
__END__ |
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