# The LearningOnline Network with CAPA
# (Publication Handler
#
# $Id: lonstatistics.pm,v 1.8 2002/03/06 23:56:13 minaeibi Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#
# (Navigate problems for statistical reports
# YEAR=2001
# 5/05,7/09,7/25/01,8/11,9/13,9/26,10/5,10/9,10/22,10/26 Behrouz Minaei
# 11/1, 11/4, 11/16, 12/14, 12/16, 12/18,12/20,12/31 Behrouz Minaei
# YEAR=2002
# 1/22, 2/1, 2/6, 2/25, 3/2, 3/6 Behrouz Minaei
###
package Apache::lonstatistics;
use strict;
use Apache::Constants qw(:common :http);
use Apache::lonnet();
use Apache::lonhomework;
use HTML::TokeParser;
use GDBM_File;
# -------------------------------------------------------------- Module Globals
my %hash;
my %CachData;
my %GraphDat;
my %maps;
my %mapsort;
my %section;
my %StuBox;
my %DiscFac;
my %DisUp;
my %DisLow;
my $UpCnt;
my $CurMap;
my $CurSec;
my $CurStu;
my @cols;
my @list;
my @students;
my $p_count;
my $Pos;
my $r;
my $OpSel1;
my $OpSel2;
my $OpSelDis1;
my $OpSelDis2;
my $OpSel3;
my $OpSel4;
my $GData;
my $cid;
my $firstres;
my $lastres;
my $DiscFlag;
my $HWN;
my $P_Order;
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");
#------- Processing upperlist and lowerlist according to each problem
sub ProcessDisc {
my @List = @_;
@List = sort (@List);
my $Count = $#List+1;
my $Prb;
my @Dis;
my $Slvd=0;
my $tmp;
my $Sum1=0;
my $Sum2=0;
my $nIdx=0;
my $nStud=0;
my %Proc;
undef %Proc;
while ($nIdx<$Count) {
($Prb,$tmp)=split(/\=/,$List[$nIdx]);
@Dis=split(/\+/,$tmp);
my $Temp = $Prb;
do {
$nIdx++;
$nStud++;
$Sum1 += $Dis[0];
$Sum2 += $Dis[1];
($Prb,$tmp)=split(/\=/,$List[$nIdx]);
@Dis=split(/\+/,$tmp);
} while ( $Prb eq $Temp && $nIdx < $Count );
# $Proc{$Temp}=($Sum1/$nStud).':'.$nStud;
$Proc{$Temp}=($Sum1/$nStud).':'.($Sum2/$nStud);
# $r->print("$nIdx) $Temp --> ($nStud) $Proc{$Temp} <br>");
$Sum1=0;
$Sum2=0;
$nStud=0;
}
return %Proc;
}
#------- Creating Discimination factor
sub Discriminant {
my $Count=0;
foreach (keys(%DiscFac)){
$Count++;
}
$UpCnt = int(0.27*$Count);
my $low=0;
my $up=$Count-$UpCnt;
my @UpList=();
my @LowList=();
$Count=0;
foreach my $key (sort(keys(%DiscFac))){
$Count++;
#$r->print("<br>$Count) $key = $DiscFac{$key}");
if ($low < $UpCnt || $Count > $up) {
$low++;
my $str=$DiscFac{$key};
foreach(split(/\:/,$str)){
if ($_) {
if ($low<$UpCnt){push(@LowList,$_);}
else {push(@UpList,$_);}
}
}
}
}
%DisUp=&ProcessDisc(@UpList);
%DisLow=&ProcessDisc(@LowList);
}
sub NumericSort {
$a <=> $b;
}
# ------ Create different Student Report
sub StudentReport {
my ($sname,$sdom)=@_;
if ( $sname eq 'All Students' ) {
$r->print( '<h3><font color=blue>WARNING:
Please select a student</font></h3>' );
return;
}
my $shome=&Apache::lonnet::homeserver($sname,$sdom);
my $reply=&Apache::lonnet::reply('dump:'.$sdom.':'.$sname.':'.$cid,$shome );
my %result = ();
my $ResId;
my $PrOrd;
my $Code;
my $Tries;
my $TotalTries = 0;
my $ParCr = 0;
my $Wrongs;
my %TempHash;
my $Version;
my $LatestVersion;
my $PtrTry='';
my $PtrCod='';
my $SetNo=0;
my $Str = "\n".'<table border=2>'.
"\n".'<tr>'.
"\n".'<th> # </th>'.
"\n".'<th> Set Title </th>'.
"\n".'<th> Results </th>'.
"\n".'<th> Tries </th>'.
"\n".'</tr>';
unless ($reply=~/^error\:/) {
foreach (split(/\&/,$reply)){
my ($name,$value)=split(/\=/,&Apache::lonnet::unescape($_));
$result{$name}=$value;
}
foreach my $CurCol (@cols) {
if (!$CurCol){
my $Set=&Apache::lonnet::declutter($hash{'map_id_'.$1});
if ( $Set ) {
$SetNo++;
$Str .= "\n"."<tr>".
"\n"."<td> $SetNo </td>".
"\n"."<td> $Set </td>".
"\n"."<td> $PtrCod </td>".
"\n"."<td> $PtrTry</td>".
"\n"."</tr>";
}
$PtrTry='';
$PtrCod='';
next;
}
($PrOrd,$ResId)=split(/\:/,$CurCol);
$ResId=~/(\d+)\.(\d+)/;
my $Map = &Apache::lonnet::declutter( $hash{'map_id_'.$1} );
if ( $CurMap ne 'All Maps' ) {
my ( $ResMap, $NameMap ) = split(/\=/,$CurMap);
if ( $Map ne $ResMap ) { next; }
}
my $meta=$hash{'src_'.$ResId};
my $PartNo = 0;
undef %TempHash;
foreach (split(/\,/,&Apache::lonnet::metadata($meta,'keys'))){
if ($_=~/^stores\_(\d+)\_tries$/) {
my $Part=&Apache::lonnet::metadata($meta,$_.'.part');
if ( $TempHash{"$Part"} eq '' ) {
$TempHash{"$Part"} = $Part;
$TempHash{$PartNo}=$Part;
$TempHash{"$Part.Code"} = '-';
$TempHash{"$Part.PrOrd"} = $PrOrd+$PartNo;
$PartNo++;
}
}
}
my $Prob = $Map.'___'.$2.'___'.
&Apache::lonnet::declutter( $hash{'src_'.$ResId} );
$Code='U';
$Tries = 0;
$Wrongs = 0;
$LatestVersion = $result{"version:$Prob"};
if ( $LatestVersion ) {
for ( my $Version=1; $Version<=$LatestVersion; $Version++ ) {
my $vkeys = $result{"$Version:keys:$Prob"};
my @keys = split(/\:/,$vkeys);
foreach my $Key (@keys) {
if (($Key=~/\.(\w+)\.solved$/) && ($Key!~/^\d+\:/)) {
my $Part = $1;
$Tries = $result{"$Version:$Prob:resource.$Part.tries"};
$TempHash{"$Part.Tries"} = ($Tries) ? $Tries : 0;
$TotalTries += $Tries;
my $Val = $result{"$Version:$Prob:resource.$Part.solved"};
if ( $Val eq 'correct_by_student' )
{ $Wrongs = $Tries - 1; $Code = 'Y'; }
elsif ( $Val eq 'correct_by_override' )
{ $Wrongs = $Tries - 1; $Code = 'y'; }
elsif ( $Val eq 'incorrect_attempted' ||
$Val eq 'incorrect_by_override' )
{ $Wrongs = $Tries; $Code = 'N'; }
$TempHash{"$Part.Code"} = $Code;
$TempHash{"$Part.Wrongs"} = $Wrongs;
}
}
}
for ( my $n = 0; $n < $PartNo; $n++ ) {
my $part = $TempHash{$n};
if ($PtrTry ne '') {$PtrTry .= ',';}
$PtrTry .= "$TempHash{$part.'.Tries'}";
$PtrCod .= "$TempHash{$part.'.Code'}";
}
}
else {
for(my $n=0; $n<$PartNo; $n++) {
if ($PtrTry ne '') {$PtrTry .= ',';}
$PtrTry .= "0";
$PtrCod .= "-";
}
}
}
}
$Str .= "\n".'</table>';
$r->print($Str);
$r->rflush();
}
sub CreateTable {
my $ColNo=0;
foreach (keys(%Header)){
$ColNo++;
}
my ($Hd, $Hid)=@_;
if ( $Hd == 1 ) {
$r->print('<br><a href="'.$hash{'src_'.$Hid}.
'" target="_blank">'.$hash{'title_'.$Hid}.'</a>');
}
my $Result = "\n".'<table border=2>';
$Result .= '<tr><th>P#</th>'."\n";
for ( my $nIdx=0; $nIdx < $ColNo; $nIdx++ ) {
$Result .= '<th>'.'<input type="submit" name="sort" value="'.
$Header{$nIdx}.'" />'.'</th>'."\n";
}
$Result .= "\n".'</tr>'."\n";
$r->print( $Result );
$r->rflush();
}
sub CloseTable {
$r->print("\n".'</table>'."\n");
$r->rflush();
}
# ------------------------------------------- Prepare Statistics Table
sub PreStatTable {
my $CacheDB = "/home/httpd/perl/tmp/$ENV{'user.name'}".
"_$ENV{'user.domain'}_$cid\_statistics.db";
my $GraphDB = "/home/httpd/perl/tmp/$ENV{'user.name'}".
"_$ENV{'user.domain'}_$cid\_graph.db";
my $CachDisFac = "/home/httpd/perl/tmp/$ENV{'user.name'}".
"_$ENV{'user.domain'}_$cid\_DiscFactor.db";
my $OpSel11='';
my $OpSel12='';
my $OpSel13='';
my $Status = $ENV{'form.status'};
if ( $Status eq 'Any' ) { $OpSel13='selected'; }
elsif ($Status eq 'Expired' ) { $OpSel12 = 'selected'; }
else { $OpSel11 = 'selected'; }
my $Ptr = '';
$Ptr .= '<br><b> Student Status: </b>'."\n".
'<select name="status">'.
'<option '.$OpSel11.' >Active</option>'."\n".
'<option '.$OpSel12.' >Expired</option>'."\n".
'<option '.$OpSel13.' >Any</option> </select> '."\n";
$Ptr .= ' ';
$Ptr .= '<input type=submit name=sort value="Recalculate Statistics"/>'."\n";
$Ptr .= '<br><b> Sorting Type: </b>'."\n".
'<select name="order"> <option '.$OpSel1.' >Ascending</option>'."\n".
'<option '.$OpSel2.'>Descending</option> </select> '."\n";
$Ptr .= ' ';
$Ptr .= '<input type="submit" name="sort" value="DoDiff Graph" />'."\n";
$Ptr .= ' ';
$Ptr .= '<input type="submit" name="sort" value="%Wrong Graph" />'."\n";
$Ptr .= '<pre>'.
'<b> #Stdnts</b>: Total Number of Students opened the problem.<br>'.
'<b> Tries </b>: Total Number of Tries for solving the problem.<br>'.
'<b> Mod </b> : Maximunm Number of Tries for solving the problem.<br>'.
'<b> Mean </b>: Average Number of the tries. [ Tries / #Stdnts ]<br>'.
'<b> #YES </b>: Number of students solved the problem correctly.<br>'.
'<b> #yes </b>: Number of students solved the problem by override.<br>'.
'<b> %Wrng </b>: Percentage of students tried to solve the problem but'.
' still incorrect. [ 100*((#Stdnts-(#YES+#yes))/#Stdnts) ]<br>'.
# ' DoDiff : Degree of Difficulty of the problem. [ Tries/(#YES+#yes+0.1) ]<br>'. Kashy formula
'<b> DoDiff </b>: Degree of Difficulty of the problem. [ 1 - ((#YES+#yes) / Tries) ]<br>'. #Gerd formula
'<b> S.D. </b> : Standard Deviation of the tries.'.
'[ sqrt(sum((Xi - Mean)^2)) / (#Stdnts-1)'.
' where Xi denotes every student\'s tries ]<br>'.
'<b> Skew. </b>: Skewness of the students tries.'.
' [ (sqrt( sum((Xi - Mean)^3) / #Stdnts)) / (S.D.^3) ]<br>'.
'<b> Dis.F. </b>: Discrimination Factor: A Standard for '.
'evaluating the problem according to a Criterion<br>'.
'<b> [Applied Criterion in %27 Upper Students - '.
'Applied the same Criterion in %27 Lower Students]</b><br>'.
'<b> 1st </b>Criterion for Sorting the Students: '.
'Sum of Partial Credit Awarded / Total Number of Tries<br>'.
'<b> 2nd </b>Criterion for Sorting the Students: '.
'Total number of Correct Answers / Total Number of Tries'.
'</pre>';
$r->print($Ptr);
$r->rflush();
if ((-e "$CacheDB")&&($ENV{'form.sort'} ne 'Recalculate Statistics')) {
if (tie(%CachData,'GDBM_File',"$CacheDB",&GDBM_READER,0640)) {
tie(%DiscFac,'GDBM_File',$CachDisFac,&GDBM_READER,0640);
tie(%GraphDat,'GDBM_File',$GraphDB,&GDBM_WRCREAT,0640);
&Cache_Statistics();
}
else {
$r->print("Unable to tie hash to db file");
}
}
else {
if (tie(%CachData,'GDBM_File',$CacheDB,&GDBM_WRCREAT,0640)) {
tie(%DiscFac,'GDBM_File',$CachDisFac,&GDBM_WRCREAT,0640);
tie(%GraphDat,'GDBM_File',$GraphDB,&GDBM_WRCREAT,0640);
foreach (keys %DiscFac) {delete $CachData{$_};}
foreach (keys %CachData) {delete $CachData{$_};}
$DiscFlag=0;
&Build_Statistics();
}
else {
$r->print("Unable to tie hash to db file");
}
}
#$r->print('Total instances of the problems : '.($p_count*($#students+1)));
untie(%CachData);
untie(%GraphDat);
untie(%DiscFac);
}
# ------------------------------------- Find the section of student in a course
sub usection {
my ($udom,$unam,$courseid,$ActiveFlag)=@_;
$courseid=~s/\_/\//g;
$courseid=~s/^(\w)/\/$1/;
foreach (split(/\&/,&Apache::lonnet::reply('dump:'.
$udom.':'.$unam.':roles',
&Apache::lonnet::homeserver($unam,$udom)))){
my ($key,$value)=split(/\=/,$_);
$key=&Apache::lonnet::unescape($key);
if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
my $section=$1;
if ($key eq $courseid.'_st') { $section=''; }
my ($dummy,$end,$start)=split(/\_/,&Apache::lonnet::unescape($value));
if ( $ActiveFlag ne 'Any' ) {
my $now=time;
my $notactive=0;
if ($start) {
if ($now<$start) { $notactive=1; }
}
if ($end) {
if ($now>$end) { $notactive=1; }
}
if ((($ActiveFlag eq 'Expired') && $notactive == 1) ||
(($ActiveFlag eq 'Active') && $notactive == 0 ) ) {
return $section;
}
else { return '-1'; }
}
return $section;
}
}
return '-1';
}
# ------ Dump the Student's DB file and handling the data for statistics table
sub ExtractStudentData {
my ($student,$coid)=@_;
my ($sname,$sdom) = split( /\:/, $student );
my $shome=&Apache::lonnet::homeserver( $sname,$sdom );
my $reply=&Apache::lonnet::reply('dump:'.$sdom.':'.$sname.':'.$coid,$shome );
my %result = ();
my $ResId;
my $PrOrd;
my $Dis = '';
my $Code;
my $Tries;
my $ParCr;
my $TotalTries = 0;
my $TotalOpend = 0;
my $ProbSolved = 0;
my $ProbTot = 0;
my $TimeTot = 0;
my $TotParCr = 0;
my $Wrongs;
my %TempHash;
my $Version;
my $LatestVersion;
my $SecLimit;
my $MapLimit;
unless ($reply=~/^error\:/) {
foreach (split(/\&/,$reply)) {
my ($name,$value)=split(/\=/,&Apache::lonnet::unescape($_));
$result{$name}=$value;
}
foreach my $CurCol(@cols) {
($PrOrd,$ResId)=split(/\:/,$CurCol);
if ( !$CurCol ) { next; }
$ResId=~/(\d+)\.(\d+)/;
my $MapId=$1;
my $PrbId=$2;
my $Map = &Apache::lonnet::declutter( $hash{'map_id_'.$MapId} );
if ( $CurMap ne 'All Maps' ) {
my ( $ResMap, $NameMap ) = split(/\=/,$CurMap);
if ( $Map ne $ResMap ) { next; }
}
my $meta=$hash{'src_'.$ResId};
my $PartNo = 0;
$Dis .= ':';
undef %TempHash;
foreach (split(/\,/,&Apache::lonnet::metadata($meta,'keys'))) {
if ($_=~/^stores\_(\d+)\_tries$/) {
my $Part=&Apache::lonnet::metadata($meta,$_.'.part');
if ( $TempHash{"$Part"} eq '' ) {
$TempHash{"$Part"} = $Part;
$TempHash{$PartNo}=$Part;
$TempHash{"$Part.Code"} = 'U';
$TempHash{"$Part.PrOrd"} = $PrOrd+$PartNo;
$PartNo++;
}
}
}
my $Prob = $Map.'___'.$PrbId.'___'.
&Apache::lonnet::declutter( $hash{'src_'.$ResId} );
$Code='U';
$Tries = 0;
$ParCr = 0;
$Wrongs = 0;
$LatestVersion = $result{"version:$Prob"};
if ( $LatestVersion ) {
for ( my $Version=1; $Version<=$LatestVersion; $Version++ ) {
my $vkeys = $result{"$Version:keys:$Prob"};
my @keys = split(/\:/,$vkeys);
foreach my $Key (@keys) {
if (($Key=~/\.(\w+)\.solved$/) && ($Key!~/^\d+\:/)) {
my $Part = $1;
$Tries = $result{"$Version:$Prob:resource.$Part.tries"};
$ParCr = $result{"$Version:$Prob:resource.$Part.awarded"};
my $Time = $result{"$Version:$Prob:timestamp"};
$TempHash{"$Part.Time"} = ($Time) ? $Time : 0;
$TempHash{"$Part.Tries"} = ($Tries) ? $Tries : 0;
$TempHash{"$Part.ParCr"} = ($ParCr) ? $ParCr : 0;
$TotalTries += $TempHash{"$Part.Tries"};
$TotParCr += $TempHash{"$Part.ParCr"};
#$r->print($Version.'---'.$Prob.'==='.$Time.'<br>');
my $Val = $result{"$Version:$Prob:resource.$Part.solved"};
if ( $Val eq 'correct_by_student' )
{ $Wrongs = $Tries - 1; $Code = 'C'; }
elsif ( $Val eq 'correct_by_override' )
{ $Wrongs = $Tries - 1; $Code = 'O'; }
elsif ( $Val eq 'incorrect_attempted' ||
$Val eq 'incorrect_by_override' )
{ $Wrongs = $Tries; $Code = 'I'; }
$TempHash{"$Part.Code"} = $Code;
$TempHash{"$Part.Wrongs"} = $Wrongs;
}
}
}
for ( my $n = 0; $n < $PartNo; $n++ ) {
my $part = $TempHash{$n};
my $Yes = 0;
if ( $TempHash{$part.'.Code'} eq 'C' ||
$TempHash{$part.'.Code'} eq 'O' )
{$ProbSolved++;$Yes=1;}
# my $ptr = "$hash{'title_'.$ResId}";
my $ptr = $TempHash{$part.'.PrOrd'}.':'.$ResId;
if ( $PartNo > 1 ) {
$ptr .= "*(part $part)";
$Dis .= ':';
}
my $Fac = ($TempHash{"$part.Tries"}) ?
($TempHash{"$part.ParCr"}/$TempHash{"$part.Tries"}) : 0;
my $DisF;
if ( $Fac > 0 && $Fac < 1 ) {
$DisF = sprintf( "%.4f", $Fac );
}
else {$DisF = $Fac;}
# $DisF .= '+'.$TempHash{"$part.Time"};
$TimeTot += $TempHash{"$part.Time"};
$Dis .= $TempHash{$part.'.PrOrd'}.'='.$DisF.'+'.$Yes;
#$r->print('<br>'.$DisFactor,'###',$DiscFac{$DisFactor});
$ptr .= ":$TempHash{$part.'.Tries'}".
":$TempHash{$part.'.Wrongs'}".
":$TempHash{$part.'.Code'}";
push (@list, $ptr);
$TotalOpend++;
$ProbTot++;
}
}
#else {
#for(my $n=0; $n<$PartNo; $n++) {
# push (@list, "$hash{'title_'.$ResId}*$ResId:0:0:U");
# $ProbTot++;
#}
#}
}
if ( $TotalTries ) {
my $DisFac = ( $TotalTries ) ? ($TotParCr/$TotalTries) : 0;
my $DisFactor = sprintf( "%.4f", $DisFac );
$DiscFac{$DisFactor}=$Dis;
#$r->print('<br>'.$DisFactor,'###',$DiscFac{$DisFactor});
#my $time;
#if ($ProbSolved){
#$time = int(($TimeTot/$ProbSolved)-10000000);
#}
#$DiscFac{($DisFactor.':'.$sname.':'.$ProbTot.':'.$TotalOpend.':'.
# $TotalTries.':'.$ProbSolved.':'.$time)}=$Dis;
}
}
#$r->print($sname.' PrCr= '.$TotParCr.' Slvd= '.$ProbSolved.' Tries='.$TotalTries.'<br>');
}
# ------------------------------------------------------------ Build page table
sub tracetable {
my ($rid,$beenhere)=@_;
$rid=~/(\d+)\.(\d+)/;
$maps{&Apache::lonnet::declutter($hash{'map_id_'.$1})}='';#$hash{'title_'.$rid};
#$maps{$HWN}=$hash{'title_'.$rid};
unless ($beenhere=~/\&$rid\&/) {
$beenhere.=$rid.'&';
if (defined($hash{'is_map_'.$rid})) {
my $cmap=$hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$rid}}};
if ( $cmap eq 'sequence' || $cmap eq 'page' ) {
$cols[$#cols+1]=0;
$P_Order++;
$HWN=$P_Order;
$mapsort{$HWN} = $rid.':';
#$maps{&Apache::lonnet::declutter($hash{'src_'.$rid})}=
# $hash{'title_'.$rid};
}
if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) &&
(defined($hash{'map_finish_'.$hash{'src_'.$rid}}))) {
my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}};
&tracetable($hash{'map_start_'.$hash{'src_'.$rid}},
'&'.$frid.'&');
$cols[$#cols+1]=($P_Order+1).':'.$frid;
my $meta=$hash{'src_'.$frid};
my $PartNo = 0;
if ($meta) {
if ($meta=~/\.(problem|exam|quiz|assess|survey|form)$/) {
foreach (split(/\,/,&Apache::lonnet::metadata($meta,'keys'))) {
if ($_=~/^stores\_(\d+)\_tries$/) {
&Apache::lonnet::metadata($meta,$_.'.part');
$P_Order++;
$mapsort{$HWN} .= '&'.$P_Order;
$PartNo++;
$r->print('<br>'.$PartNo.'---'.$P_Order);
}
}
}
}
}
} else {
$cols[$#cols+1]=($P_Order+1).':'.$rid;
my $meta=$hash{'src_'.$rid};
my $PartNo = 0;
if ($meta) {
if ($meta=~/\.(problem|exam|quiz|assess|survey|form)$/) {
foreach (split(/\,/,&Apache::lonnet::metadata($meta,'keys'))) {
if ($_=~/^stores\_(\d+)\_tries$/) {
&Apache::lonnet::metadata($meta,$_.'.part');
$P_Order++;
$mapsort{$HWN} .= '&'.$P_Order;
$PartNo++;
}
}
}
}
}
if (defined($hash{'to_'.$rid})) {
foreach (split(/\,/,$hash{'to_'.$rid})){
&tracetable($hash{'goesto_'.$_},$beenhere);
}
}
}
}
sub MySort {
if ( $Pos > 0 ) {
if ($ENV{'form.order'} eq 'Descending') {$b <=> $a;}
else { $a <=> $b; }
}
else {
if ($ENV{'form.order'} eq 'Descending') {$b cmp $a;}
else { $a cmp $b; }
}
}
sub Build_Statistics {
$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();
# ---------------------------- Gathering the Data of students' tries
my $index;
for ($index=0;$index<=$#students;$index++) {
#----------- update progress
$r->print('<script>popwin.document.popremain.remaining.value="'.
'Computing '.($index+1).'/'.($#students+1).': '.
$students[$index].'";</script>');
$r->rflush();
&ExtractStudentData($students[$index],$cid);
}
# -------------------- sorting the Data
$r->print('<script>popwin.document.popremain.remaining.value="'.
'Calculating Discrimination Factors...";</script>');
@list = sort (@list);
&Discriminant();
$OpSel2='';
$OpSel1='selected';
$p_count = 0;
my $nIdx = 0;
my $dummy;
my $p_val;
my $ResId;
my $NoElements = $#list + 1;
#-------------------------------- loop for data representation
foreach (sort keys %mapsort) {
my ($Hid,$pr)=split(/\:/,$mapsort{$_});
my @lpr=split(/\&/,$pr);
&CreateTable(1,$Hid);
for (my $i=1; $i<=$#lpr; $i++) {
my %storestats=();
my ($PrOrd,$Prob,$Tries,$Wrongs,$Code)=split(/\:/,$list[$nIdx]);
my $Temp = $Prob;
my $MxTries = 0;
my $TotalTries = 0;
my $YES = 0;
my $Incorrect = 0;
my $Override = 0;
my $StdNo = 0;
my @StdLst;
while ( $PrOrd == $lpr[$i] )
{
$nIdx++;
$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 'U' ) { $StdNo--; }
($PrOrd,$Prob,$Tries,$Wrongs,$Code)=split(/\:/,$list[$nIdx]);
}
$p_count++;
my $Dummy;
($ResId,$Dummy)=split(/\*/,$Temp);
$Temp = '<a href="'.$hash{'src_'.$ResId}.
'" target="_blank">'.$hash{'title_'.$ResId}.$Dummy.'</a>';
my $res = &Apache::lonnet::declutter($hash{'src_'.$ResId});
my $urlres=$res;
$ResId=~/(\d+)\.(\d+)/;
my $Map = &Apache::lonnet::declutter( $hash{'map_id_'.$1} );
$urlres=$Map;
$res = '<a href="'.$hash{'src_'.$ResId}.'">'.$res.'</a>';
#$Map = '<a href="'.$Map.'">'.$res.'</a>';
#------------------------ 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,$Up2)=split(/\:/,$DisUp{$lpr[$i]});
my ($Lw1,$Lw2)=split(/\:/,$DisLow{$lpr[$i]});
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 = $PrOrd.':'.$Temp.':'.$StdNo.':'.
$TotalTries.':'.$MxTries.':'.$Avg.':'.
$YES.':'.$Override.':'.$Wrng.':'.$DoD.':'.
$SD.':'.$Sk.':'.$_D1.':'.$_D2.':'.$Prob;
$CachData{($p_count-1)}=$join;
$urlres=~/^(\w+)\/(\w+)/;
if ($StdNo) {
&Apache::lonnet::put('resevaldata',\%storestats,$1,$2);
}
#-------------------------------- Row of statistical table
if ( $DiscFlag == 0 ) {
&TableRow($join,$i,($p_count-1));
}
}
&CloseTable();
}
#--------------------- close Progress Line
$r->print('<script>popwin.close()</script>');
$r->rflush();
}
sub Cache_Statistics {
my @list = ();
my $Useful;
my $UnUseful;
my %myHeader = reverse( %Header );
$Pos = $myHeader{$ENV{'form.sort'}};
if ($Pos > 0) {$Pos++;}
$p_count = 0;
foreach my $key( keys %CachData) {
my @Temp=split(/\:/,$CachData{$key});
if ( $Pos == 0 ) {
($UnUseful,$Useful)=split(/\>/,$Temp[$Pos]);
}
else {
$Useful = $Temp[$Pos];
}
$list[$p_count]=$Useful.'&'.$CachData{$key};
$p_count++;
}
@list = sort MySort (@list);
my $nIdx=0;
if ( $Pos == 0 ) {
foreach (sort keys %mapsort) {
my ($Hid,$pr)=split(/\:/,$mapsort{$_});
&CreateTable(1,$Hid);
my @lpr=split(/\&/,$pr);
for (my $i=1; $i<=$#lpr; $i++) {
my($Pre, $Post) = split(/\&/,$list[$nIdx]);
&TableRow($Post,$i,$nIdx);
$nIdx++;
}
&CloseTable();
}
}
else {
&CreateTable(0);
for ( my $nIdx = 0; $nIdx < $p_count; $nIdx++ ) {
my($Pre, $Post) = split(/\&/,$list[$nIdx]);
&TableRow($Post,$nIdx,$nIdx);
}
&CloseTable();
}
}
sub TableRow {
my ($Str,$Idx,$RealIdx)=@_;
my($PrOrd,$Temp,$StdNo,$TotalTries,$MxTries,$Avg,$YES,
$Override,$Wrng,$DoD,$SD,$Sk,$_D1,$_D2,$Prob)=split(/\:/,$Str);
$r->print( "\n".'<tr>'.
"\n".'<td>'.($RealIdx+1).'</td>'.
"\n".'<td>'.$Temp.'</td>'.
"\n".'<td bgcolor="#EEFFCC"> '.$StdNo.'</td>'.
"\n".'<td bgcolor="#EEFFCC">'.$TotalTries.'</td>'.
"\n".'<td bgcolor="#EEFFCC">'.$MxTries.'</td>'.
"\n".'<td bgcolor="#DDFFFF">'.$Avg.'</td>'.
"\n".'<td bgcolor="#DDFFFF"> '.$YES.'</td>'.
"\n".'<td bgcolor="#DDFFFF"> '.$Override.'</td>'.
"\n".'<td bgcolor="#FFDDDD"> '.$Wrng.'</td>'.
"\n".'<td bgcolor="#FFDDDD">'.$DoD.'</td>'.
"\n".'<td bgcolor="#DDFFDD"> '.$SD.'</td>'.
"\n".'<td bgcolor="#DDFFDD"> '.$Sk.'</td>'.
"\n".'<td bgcolor="#FFDDFF"> '.$_D1.'</td>'.
"\n".'<td bgcolor="#FFDDFF"> '.$_D2.'</td>'.
"\n".'</tr>' );
$GraphDat{$RealIdx}=$DoD.':'.$Wrng;
}
# ------------------------------------------- Prepare data for Graphical chart
sub GetGraphData {
my $Tag = shift;
my $Col;
my $data='';
my $count = 0;
my $Max = 0;
my $cid=$ENV{'request.course.id'};
my $GraphDB = "/home/httpd/perl/tmp/$ENV{'user.name'}".
"_$ENV{'user.domain'}_$cid\_graph.db";
foreach (keys %GraphDat) {delete $GraphDat{$_};}
if (-e "$GraphDB") {
if (tie(%GraphDat,'GDBM_File',"$GraphDB",&GDBM_READER,0640)) {
if ( $Tag eq 'DoDiff Graph' ) {
$Tag = 'Degree-of-Difficulty';
$Col = 0;
}
else {
$Tag = 'Wrong-Percentage';
$Col = 1;
}
foreach (sort NumericSort keys %GraphDat) {
my @Temp=split(/\:/,$GraphDat{$_});
my $inf = $Temp[$Col];
if ( $Max < $inf ) {$Max = $inf;}
$data .= $inf.',';
$count++;
}
untie(%GraphDat);
my $Course = $ENV{'course.'.$cid.'.description'};
$Course =~ s/\ /"_"/eg;
$GData=$Course.'&'.$Tag.'&'.$Max.'&'.$count.'&'.$data;
}
else {
$r->print("Unable to tie hash to db file");
}
}
}
sub initial {
# --------------------------------- Initialize the global varaibles
undef @students;
undef @cols;
undef %maps;
undef %section;
undef %StuBox;
undef @list;
undef %CachData;
undef %GraphDat;
undef %DiscFac;
undef $CurMap;
undef $CurSec;
undef $CurStu;
undef $p_count;
undef $Pos;
undef $GData;
$DiscFlag=0;
$P_Order=100000;
$HWN=$P_Order;
}
sub ClassList {
&GetStatus();
$cid=$ENV{'request.course.id'};
my $chome=$ENV{'course.'.$cid.'.home'};
my ($cdom,$cnum)=split(/\_/,$cid);
# ----------------------- Get first and last resource, see if there is anything
$firstres=$hash{'map_start_/res/'.$ENV{'request.course.uri'}};
$lastres=$hash{'map_finish_/res/'.$ENV{'request.course.uri'}};
if (($firstres) && ($lastres)) {
# ----------------------------------------------------------------- Render page
my $classlst=&Apache::lonnet::reply
('dump:'.$cdom.':'.$cnum.':classlist',$chome);
my $StudNo = 0;
my $now=time;
unless ($classlst=~/^error\:/) {
foreach (sort split(/\&/,$classlst)) {
my ($name,$value)=split(/\=/,$_);
my ($end,$start)=split(/\:/,&Apache::lonnet::unescape($value));
$name=&Apache::lonnet::unescape($name);
my ($sname,$sdom)=split(/\:/,$name);
my $active=1;
my $Status=$ENV{'form.status'};
$Status = ($Status) ? $Status : 'Active';
if ( ( ($end) && $now > $end ) &&
( ($Status eq 'Active') ) ) { $active=0; }
if ( ($Status eq 'Expired') &&
($end == 0 || $now < $end) ) { $active=0; }
if ($active) {
my $thisindex=$#students+1;
$name=&Apache::lonnet::unescape($name);
$students[$thisindex]=$name;
my ($sname,$sdom)=split(/\:/,$name);
#my %reply=&Apache::lonnet::idrget($sdom,$sname);
#my $reply=&Apache::lonnet::reply('get:'.$sdom.':'.$sname.
# ':environment:lastname&generation&firstname&middlename',
# &Apache::lonnet::homeserver($sname,$sdom));
my $ssec=&usection($sdom,$sname,$cid,$Status);
if ($ssec==-1) {next;}
$ssec=($ssec) ? $ssec : '(none)';
#$ssec=(int($ssec)) ? int($ssec) : $ssec;
#$r->print($sname.'...'.$ssec.'<br>');
$section{$ssec}=$ssec;
if ($CurSec eq 'All Sections' || $ssec eq $CurSec) {
$students[$StudNo]=$name;
$StuBox{$sname}=$sdom;
}
$StudNo++;
}
}
}
else {
$r->print('<h1>Could not access course data</h1>');
}
$r->print("Total number of students : ".($#students+1));
$r->rflush();
# --------------- Find all assessments and put them into some linear-like order
&tracetable($firstres,'&'.$lastres.'&');
# my $c=0;
# foreach (sort keys %mapsort) {
# $r->print('<br>'.$c.')'.$_.' ... '.$mapsort{$_});
# $c++;
# }
#foreach(@cols) {
# $c++;
# $r->print('<br>'.$cols[$c]);
#}
#$r->print('<br> Count = '.$c);
}
# ------------------------------------------------------------- End render page
else {
$r->print('<h3>Undefined course sequence</h3>');
}
&MapSecOptions();
}
sub Menu {
my $InpStr = $ENV{'form.sort'};
if ( $InpStr eq 'DoDiff Graph' || $InpStr eq '%Wrong Graph' ) {
&GetGraphData($InpStr);
$r->print('<IMG src="/cgi-bin/graph.gif?'.$GData.'" />');
}
else {
$r->print('<html><head><title>LON-CAPA Statistics</title></head>');
$r->print('<body bgcolor="#FFFFFF">'.
'<script>window.focus(); window.width=500;window.height=500; </script>'.
'<img align=right src=/adm/lonIcons/lonlogos.gif>');
# ---------------------------------------------------------------- Course title
$r->print('<h1> Course : "'.
$ENV{'course.'.$ENV{'request.course.id'}.
'.description'}.'"</h1><h2>'.localtime().'</h2>');
# ------------------------------- This is going to take a while, produce output
$r->rflush();
$r->print("\n".'<form name=stat method=post action="/adm/statistics" >');
my $content = $ENV{'form.sort'};
if ($content eq '' || $content eq 'Return to Menu') {
my $Ptr = '<h3>';
$Ptr .= '<input type=submit name=sort value="Problem Evaluation"/>';
$Ptr .= '<br><br>';
$Ptr .= '<input type=submit name=sort value="Student Assessment"/>';
$Ptr .= '</h3>';
$r->print( $Ptr );
}
else {
&initial();
&ClassList();
if ( $content eq 'Discrimination' || #'Problem Evaluation' ||
$content eq 'Recalculate Discrimintion Factor' ) {
&CreateDiscFac();
}
elsif ( $content eq 'Student Assessment' ||
$content eq 'Create Student Report' ) {
&StudentOptions();
&StudentReport($CurStu,$StuBox{"$CurStu"});
}
else {
&PreStatTable();
}
}
$r->print("\n".'</form>'.
"\n".'</body>'.
"\n".'</html>');
$r->rflush();
}
}
sub StudentOptions {
my $OpSel5='';
$CurStu = $ENV{'form.student'};
if ( $CurStu eq '' ) {
$CurStu = 'All Students';
$OpSel5 = 'selected';
}
my $Ptr ='';
# ----------------------------------- Loading the Students Combobox
$Ptr .= '<br><b>Select Student</b>'."\n".
'<select name="student">'."\n".
'<option '.$OpSel5.'>All Students</option>';
foreach my $key ( sort keys %StuBox ) {
$Ptr .= '<option';
if ($CurStu eq $key) {$Ptr .= ' selected';}
$Ptr .= '>'.$key."</option>\n";
}
$Ptr .= '</select>';
$Ptr .= '<br><input type="submit" name="sort" value="Create Student Report" />';
$r->print( $Ptr );
$r->rflush();
}
sub GetStatus {
$OpSel1='';
$OpSel2='';
$OpSel3='';
$OpSel4='';
if ( $ENV{'form.order'} eq 'Descending' ) { $OpSel2='selected'; }
else { $OpSel1 = 'selected'; }
my %myHeader = reverse( %Header );
$Pos = $myHeader{$ENV{'form.sort'}};
if ($Pos == 0) {
$OpSel1 = 'selected';
$ENV{'form.order'}='Ascendig';
}
$CurMap = $ENV{'form.maps'};
if ( $CurMap eq '' ) {
$CurMap = 'All Maps';
$OpSel3 = 'selected';
}
$CurSec = $ENV{'form.section'};
if ( $CurSec eq '' ) {
$CurSec = 'All Sections';
$OpSel4 = 'selected';
}
}
sub MapSecOptions {
# ----------------------------------- Loading the Maps Combobox
my $Ptr = '<br>';
$Ptr .= '<br><input type="submit" name="sort" value="Return to Menu" />';
$Ptr .= '<br><b> Select Map </b>'."\n".
'<select name="maps">'."\n".
'<option '.$OpSel3.'>All Maps</option>';
foreach my $key ( sort keys %maps ) {
$Ptr .= '<option';
if ($CurMap eq $key) {$Ptr .= ' selected';}
$Ptr .= '>'.$key."</option>\n";
}
$Ptr .= '</select>';
$Ptr .= ' ';
# ----------------------------------- Loading the Sections Combobox
$Ptr .= '<br><b>Select Section</b>'."\n".
'<select name="section">'."\n".
'<option '.$OpSel4.'>All Sections</option>';
foreach my $key ( sort keys %section ) {
$Ptr .= '<option';
if ($CurSec eq $key) {$Ptr .= ' selected';}
$Ptr .= '>'.$key."</option>"."\n";
}
$Ptr .= '</select>'."\n";
$r->print( $Ptr );
$r->rflush();
}
# ================================================================ Main Handler
sub handler {
$r=shift;
if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
# ------------------------------------------- Set document type for header only
if ($r->header_only) {
if ($ENV{'browser.mathml'}) {
$r->content_type('text/xml');
}
else {
$r->content_type('text/html');
}
$r->send_http_header;
return OK;
}
my $requrl=$r->uri;
# ----------------------------------------------------------------- Tie db file
undef %hash;
if ($ENV{'request.course.fn'}) {
my $fn=$ENV{'request.course.fn'};
if (-e "$fn.db") {
if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER,0640)) {
# ------------------------------------------------------------------- Hash tied
$r->content_type('text/html');
$r->send_http_header;
&Menu();
}
else {
$r->content_type('text/html');
$r->send_http_header;
$r->print('<html><body>Coursemap undefined.</body></html>');
}
# ------------------------------------------------------------------ Untie hash
unless (untie(%hash)) {
&Apache::lonnet::logthis("<font color=blue>WARNING: ".
"Could not untie coursemap $fn (browse).</font>");
}
# -------------------------------------------------------------------- All done
return OK;
# ----------------------------------------------- Errors, hash could no be tied
}
}
else {
$ENV{'user.error.msg'}="$requrl:bre:0:0:Course not initialized";
return HTTP_NOT_ACCEPTABLE;
}
}
else {
$ENV{'user.error.msg'}=
$r->uri.":vgr:0:0:Cannot view grades for complete course";
return HTTP_NOT_ACCEPTABLE;
}
}
1;
__END__
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