'."\n";
+=item $show 'all', 'totals', or 'scores' determines how much data is output
- return $Str;
-}
+=cut
+
+#######################################################
+#######################################################
+my $show_links;
+my $output_mode;
+my $show;
+
+#######################################################
+#######################################################
+# End of package variable declarations
=pod
-=item &FormatStudentData()
+=back
-First, FormatStudentInformation is called and prefixes the course information.
-This function produces a formatted string of the student\'s course information.
-Each column of data represents all the problems for a given sequence. For
-valid grade data, a link is created for that problem to a submission record
-for that problem.
+=cut
-=over 4
+#######################################################
+#######################################################
-Input: $name, $studentInformation, $ChartDB
+=pod
-$name: The name and domain of the current student in name:domain format
+=item &BuildStudentAssessmentPage()
-$studentInformation: A pointer to an array holding the names used to
-remove data from the hash. They represent
-the name of the data to be removed.
+Inputs:
-$ChartDB: The name of the cached data database which will be tied to that
-database.
+=over 4
-Output: $Str
+=item $r Apache Request
-$Str: Formatted string that is an entire row of the chart. It is a
-concatenation of student information and student course information.
+=item $c Apache Connection
=back
=cut
-sub StudentReport {
- my ($cache,$name,$spacing,$showSequences)=@_;
- my ($username,$domain)=split(':',$name);
-
- my $Str = '';
- if(defined($cache->{$name.':error'})) {
- return $Str;
+#######################################################
+#######################################################
+sub BuildStudentAssessmentPage {
+ my ($r,$c)=@_;
+ undef($Statistics);
+ #
+ # Print out the HTML headers for the interface
+ # This also parses the output mode selector
+ # This step must always be done.
+ $r->print(&CreateInterface());
+ $r->print('');
+ $r->rflush();
+ if (! exists($ENV{'form.notfirstrun'})) {
+ $r->print(<
+
+Please make your selections in the boxes above and hit
+the button marked "Update Display".
+
+
+ENDMSG
+ return;
}
- if($cache->{$name.':error'} =~ /course/) {
- $Str .= 'No course data for student ';
- $Str .= ''.$username.'. ';
- return $Str;
- }
-
- my $hasVersion = 'false';
- my $hasFinalData = 'false';
- foreach my $sequence (@$showSequences) {
- my $hasData = 'false';
- my $characterCount=0;
- foreach my $problemID (split(':', $cache->{$sequence.':problems'})) {
- my $problem = $cache->{$problemID.':problem'};
- # All grades (except for versionless parts) are displayed as links
- # to their submission record. Loop through all the parts for the
- # current problem in the correct order and prepare the output links
- foreach(split(/\:/,$cache->{$sequence.':'.$problemID.
- ':parts'})) {
- if($cache->{$name.':'.$problemID.':NoVersion'} eq 'true' ||
- $cache->{$name.':'.$problemID.':'.$_.':code'} eq ' ' ||
- $cache->{$name.':'.$problemID.':'.$_.':code'} eq '') {
- $Str .= ' ';
- $characterCount++;
- next;
- }
- $hasVersion = 'true';
- $hasData = 'true';
- if (lc($ENV{'form.displaymode'}) ne 'display without links') {
- $Str .= '';
- }
- my $code = $cache->{$name.':'.$problemID.':'.$_.':code'};
- my $tries = $cache->{$name.':'.$problemID.':'.$_.':tries'};
- if($code eq '*' && $tries < 10 && $tries ne '') {
- $code = $tries;
- }
- $Str .= $code;
- if (lc($ENV{'form.displaymode'}) ne 'display without links') {
- $Str .= '';
- }
- $characterCount++;
- }
+ #
+ #
+ my $initialize = \&html_initialize;
+ my $output_student = \&html_outputstudent;
+ my $finish = \&html_finish;
+ #
+ if ($output_mode eq 'excel') {
+ $initialize = \&excel_initialize;
+ $output_student = \&excel_outputstudent;
+ $finish = \&excel_finish;
+ } elsif ($output_mode eq 'csv') {
+ $initialize = \&csv_initialize;
+ $output_student = \&csv_outputstudent;
+ $finish = \&csv_finish;
+ }
+ #
+ if($c->aborted()) { return ; }
+ #
+ # Call the initialize routine selected above
+ $initialize->($r);
+ foreach my $student (@Apache::lonstatistics::Students) {
+ if($c->aborted()) {
+ $finish->($r);
+ return ;
}
+ # Call the output_student routine selected above
+ $output_student->($r,$student);
+ }
+ # Call the "finish" routine selected above
+ $finish->($r);
+ #
+ return;
+}
- # Output the number of correct answers for the current sequence.
- # This part takes up 6 character slots, but is formated right
- # justified.
- my $spacesNeeded=$cache->{$sequence.':columnWidth'}-$characterCount;
- $spacesNeeded -= 3;
- $Str .= (' 'x$spacesNeeded);
-
-# my $outputProblemsCorrect = sprintf("%3d", $cache->{$name.':'.$sequence.
-# ':problemsCorrect'});
-
- my $outputProblemsCorrect = sprintf("%2d/%2d", $cache->{$name.':'.$sequence.
- ':problemsCorrect'},
- $characterCount);
- if($hasData eq 'true') {
- $Str .= ''.$outputProblemsCorrect.'';
- $hasFinalData = 'true';
- } else {
- $Str .= ' ';
+#######################################################
+#######################################################
+
+sub get_student_fields_to_show {
+ my @to_show = @Apache::lonstatistics::SelectedStudentData;
+ foreach (@to_show) {
+ if ($_ eq 'all') {
+ @to_show = @Apache::lonstatistics::StudentDataOrder;
+ last;
}
- $Str .= $spacing;
}
+ return @to_show;
+}
- # Output the total correct problems over the total number of problems.
- # I don't like this type of formatting, but it is a solution. Need
- # a way to dynamically determine the space requirements.
- my $outputProblemsSolved = sprintf("%4d", $cache->{$name.':problemsSolved'});
- my $outputTotalProblems = sprintf("%4d", $cache->{$name.':totalProblems'});
- if($hasFinalData eq 'true') {
- $Str .= ''.$outputProblemsSolved.
- ' / '.$outputTotalProblems.'';
- } else {
- $Str .= ' ';
+sub get_sequences_to_show {
+ my @Sequences;
+ foreach my $map_symb (@Apache::lonstatistics::SelectedMaps) {
+ foreach my $sequence (@Apache::lonstatistics::Sequences) {
+ next if ($sequence->{'symb'} ne $map_symb && $map_symb ne 'all');
+ next if ($sequence->{'num_assess'} < 1);
+ push (@Sequences,$sequence);
+ }
}
+ return @Sequences;
+}
- if($hasVersion eq 'false') {
- $Str = 'No course data.';
- }
- return $Str;
-}
+#######################################################
+#######################################################
+
+=pod
+=item &CreateInterface()
-sub StudentAverageTotal {
-
- return "";
+Called by &BuildStudentAssessmentPage to create the top part of the
+page which displays the chart.
- my ($cache,$name,$spacing,$showSequences)=@_;
- my $username = $name;
+Inputs: None
+
+Returns: A string containing the HTML for the headers and top table for
+the chart page.
+
+=cut
+
+#######################################################
+#######################################################
+sub CreateInterface {
my $Str = '';
- my $hasVersion = 'false';
- my $hasFinalData = 'false';
- foreach my $sequence (@$showSequences) {
- my $hasData = 'false';
- my $characterCount=0;
- foreach my $problemID (split(':', $cache->{$sequence.':problems'})) {
- my $problem = $cache->{$problemID.':problem'};
- # All grades (except for versionless parts) are displayed as links
- # to their submission record. Loop through all the parts for the
- # current problem in the correct order and prepare the output links
- foreach(split(/\:/,$cache->{$sequence.':'.$problemID.
- ':parts'})) {
- if($cache->{$name.':'.$problemID.':NoVersion'} eq 'true' ||
- $cache->{$name.':'.$problemID.':'.$_.':code'} eq ' ' ||
- $cache->{$name.':'.$problemID.':'.$_.':code'} eq '') {
- $Str .= ' ';
- $characterCount++;
- next;
- }
- $hasVersion = 'true';
- $hasData = 'true';
- $Str .= '';
- my $code = $cache->{$name.':'.$problemID.':'.$_.':code'};
- my $tries = $cache->{$name.':'.$problemID.':'.$_.':tries'};
- if($code eq '*' && $tries < 10 && $tries ne '') {
- $code = $tries;
- }
- $Str .= $code;
- $Str .= '';
- $characterCount++;
- }
+# $Str .= &CreateLegend();
+ $Str .= '
'."\n";
+ return $Str;
+}
+
+#######################################################
+#######################################################
- # Output the number of correct answers for the current sequence.
- # This part takes up 6 character slots, but is formated right
- # justified.
- my $spacesNeeded=$cache->{$sequence.':columnWidth'}-$characterCount;
- $spacesNeeded -= 3;
- $Str .= (' 'x$spacesNeeded);
-
-# my $outputProblemsCorrect = sprintf("%3d", $cache->{$name.':'.$sequence.
-# ':problemsCorrect'});
-
- my $outputProblemsCorrect = sprintf("%2d/%2d", $cache->{$name.':'.$sequence.
- ':problemsCorrect'},
- $characterCount);
- if($hasData eq 'true') {
- $Str .= ''.$outputProblemsCorrect.'';
- $hasFinalData = 'true';
+=pod
+
+=item &CreateAndParseOutputSelector()
+
+=cut
+
+#######################################################
+#######################################################
+my @OutputOptions =
+ ({ name => 'HTML, with links',
+ value => 'html, with links',
+ description => ''},
+ { name => 'HTML, without links',
+ value => 'html, without links',
+ description => ''},
+ { name => 'HTML, totals',
+ value => 'html, totals',
+ description => ''},
+ { name => 'HTML, scores only',
+ value => 'html, scores only',
+ description => ''},
+ { name => 'Excel, totals',
+ value => 'excel, totals',
+ description => ''},
+ { name => 'Excel, scores only',
+ value => 'excel, scores only',
+ description => ''},
+ { name => 'CSV, totals',
+ value => 'csv, totals',
+ description => ''},
+ { name => 'CSV, scores only',
+ value => 'csv, scores only',
+ description => ''},
+ { name => 'CSV, everything',
+ value => 'csv, everything',
+ description => ''}
+ );
+
+sub CreateAndParseOutputSelector {
+ my $Str = '';
+ my $elementname = 'outputmode';
+ #
+ # Format for output options is 'mode, restrictions';
+ my $selected = 'html, with links';
+ if (exists($ENV{'form.'.$elementname})) {
+ if (ref($ENV{'form.'.$elementname} eq 'ARRAY')) {
+ $selected = $ENV{'form.'.$elementname}->[0];
} else {
- $Str .= ' ';
+ $selected = $ENV{'form.'.$elementname};
}
- $Str .= $spacing;
}
-
- # Output the total correct problems over the total number of problems.
- # I don't like this type of formatting, but it is a solution. Need
- # a way to dynamically determine the space requirements.
- my $outputProblemsSolved = sprintf("%4d", $cache->{$name.':problemsSolved'});
- my $outputTotalProblems = sprintf("%4d", $cache->{$name.':totalProblems'});
- if($hasFinalData eq 'true') {
- $Str .= ''.$outputProblemsSolved.
- ' / '.$outputTotalProblems.'';
+ #
+ # Set package variables describing output mode
+ $show_links = 'no';
+ $output_mode = 'html';
+ $show = 'all';
+ my ($mode,$restriction) = split(',',$selected);
+ $restriction =~ s/^\s*//;
+ if ($mode =~ /^(html|excel|csv)$/) {
+ $output_mode = $mode;
} else {
- $Str .= ' ';
+ $output_mode = 'html';
}
-
- if($hasVersion eq 'false') {
- $Str = 'No course data.';
+ if ($restriction eq 'with links') {
+ $show_links = 'yes';
+ } else {
+ $show_links = 'no';
}
-
+ if ($restriction eq 'totals') {
+ $show = 'totals';
+ } elsif ($restriction eq 'scores only') {
+ $show = 'scores';
+ } else {
+ $show = 'everything';
+ }
+ #
+ # Build the form element
+ $Str = qq/";
return $Str;
}
-
+#######################################################
+#######################################################
=pod
-=item &CreateLegend()
+=head2 HTML output routines
-This function returns a formatted string containing the legend for the
-chart. The legend describes the symbols used to represent grades for
-problems.
+=item &html_initialize($r)
+
+Create labels for the columns of student data to show.
+
+=item &html_outputstudent($r,$student)
+
+Return a line of the chart for a student.
+
+=item &html_finish($r)
=cut
-sub CreateLegend {
- my $Str = "
".
- " 1 correct by student in 1 try\n".
- " 7 correct by student in 7 tries\n".
- " * correct by student in more than 9 tries\n".
- " + correct by override\n".
- " - incorrect by override\n".
- " . incorrect attempted\n".
- " # ungraded attempted\n".
- " not attempted (blank field)\n".
- " x excused".
- "
";
- return $Str;
+#######################################################
+#######################################################
+{
+ my $padding;
+ my $count;
+
+sub html_initialize {
+ my ($r) = @_;
+ #
+ $padding = ' 'x3;
+ $count = 1;
+ #
+ my $Str = "
\n";
+ # First, the @StudentData fields need to be listed
+ my @to_show = &get_student_fields_to_show();
+ foreach my $field (@to_show) {
+ my $title=$Apache::lonstatistics::StudentData{$field}->{'title'};
+ my $base =$Apache::lonstatistics::StudentData{$field}->{'base_width'};
+ my $width=$Apache::lonstatistics::StudentData{$field}->{'width'};
+ $Str .= $title.' 'x($width-$base).$padding;
+ }
+ # Now the selected sequences need to be listed
+ foreach my $sequence (&get_sequences_to_show) {
+ my $title = $sequence->{'title'};
+ my $base = $sequence->{'base_width'};
+ my $width = $sequence->{'width'};
+ $Str .= $title.' 'x($width-$base).$padding;
+ }
+ $Str .= "total (of shown problems)
\n";
+ $Str .= "
";
+ $r->print($Str);
+ $r->rflush();
+ return;
}
-=pod
-
-=item &CreateColumnSelectionBox()
+sub html_outputstudent {
+ my ($r,$student) = @_;
+ my $Str = '';
+ # First, the @StudentData fields need to be listed
+ my @to_show = &get_student_fields_to_show();
+ foreach my $field (@to_show) {
+ my $title=$student->{$field};
+ my $base = length($title);
+ my $width=$Apache::lonstatistics::StudentData{$field}->{'width'};
+ $Str .= $title.' 'x($width-$base).$padding;
+ }
+ # Get ALL the students data
+ my %StudentsData;
+ my @tmp = &Apache::loncoursedata::get_current_state
+ ($student->{'username'},$student->{'domain'},undef,
+ $ENV{'request.course.id'});
+ if ((scalar @tmp > 0) && ($tmp[0] !~ /^error:/)) {
+ %StudentsData = @tmp;
+ }
+ if (scalar(@tmp) < 1) {
+ $Str .= 'No Course Data'."\n";
+ $r->print($Str);
+ $r->rflush();
+ return;
+ }
+ #
+ # By sequence build up the data
+ my $studentstats;
+ my $PerformanceStr = '';
+ foreach my $seq (&get_sequences_to_show) {
+ my ($performance,$score,$seq_max) =
+ &StudentPerformanceOnSequence($student,\%StudentsData,
+ $seq,$show_links);
+ my $ratio = $score.'/'.$seq_max;
+ #
+ if ($show eq 'totals') {
+ $performance = ' 'x(length($seq_max)-length($score)).$ratio;
+ $performance .= ' 'x($seq->{'width'}-length($performance));
+ } elsif ($show eq 'scores') {
+ $performance = $score;
+ $performance .= ' 'x($seq->{'width'}-length($performance));
+ } else {
+ # Pad with extra spaces
+ $performance .= ' 'x($seq->{'width'}-$seq_max-
+ length($ratio)
+ ).$ratio;
+ }
+ #
+ $Str .= $performance.$padding;
+ #
+ $studentstats->{$seq->{'symb'}}->{'score'}= $score;
+ $studentstats->{$seq->{'symb'}}->{'max'} = $seq_max;
+ }
+ #
+ # Total it up and store the statistics info.
+ my ($score,$max) = (0,0);
+ while (my ($symb,$seq_stats) = each (%{$studentstats})) {
+ $Statistics->{$symb}->{'score'} += $seq_stats->{'score'};
+ $Statistics->{$symb}->{'max'} += $seq_stats->{'max'};
+ $score += $seq_stats->{'score'};
+ $max += $seq_stats->{'max'};
+ }
+ $Str .= ' '.' 'x(length($max)-length($score)).$score.'/'.$max;
+ $Str .= " \n";
+ $r->print($Str);
+ #
+ $count++;
+ if($count % 5 == 0) {
+ $r->print("
");
+ }
+ #
+ $r->rflush();
+ return;
+}
-If there are columns not being displayed then this selection box is created
-with a list of those columns. When selections are made and the page
-refreshed, the columns will be removed from this box and the column is
-put back in the chart. If there is no columns to select, no row is added
-to the interface table.
+sub html_finish {
+ my ($r) = @_;
+ $r->print("
\n");
+ $r->rflush();
+ return;
+}
-=over 4
-Input: $CacheData, $headings
+}
+#######################################################
+#######################################################
-$CacheData: A pointer to a hash tied to the cached data
+=pod
-$headings: An array of the names of the columns for the student information.
-They are used for displaying which columns are missing.
+=head2 EXCEL subroutines
-Output: $notThere
+=item &excel_initialize($r)
-$notThere: The string contains one row of a table. The first column has the
-name of the selection box. The second contains the selection box
-which has a size of four.
+=item &excel_outputstudent($r,$student)
-=back
+=item &excel_finish($r)
=cut
-sub CreateColumnSelectionBox {
- my ($doNotShow)=@_;
-
- my $notThere = '';
- $notThere .= '';
+sub excel_finish {
+ my ($r) = @_;
+ return if (! defined($excel_sheet));
+ #
+ # Write the excel file
+ $excel_workbook->close();
+ my $c = $r->connection();
+ #
+ return if($c->aborted());
+ #
+ # Tell the user where to get their excel file
+ $r->print('
'.
+ 'Your Excel spreadsheet.'."\n");
+ my $total_time = time - $start_time;
+ if (int ($total_time / 60) > 0) {
+ $total_time = int($total_time/60).' minutes, '.($total_time % 60);
+ }
+ $r->print(' '.$total_time.' seconds total');
+ $r->rflush();
+ return;
+}
- return $notThere;
}
+#######################################################
+#######################################################
=pod
-=item &CreateColumnSelectors()
+=head2 CSV output routines
-This function generates the checkboxes above the column headings. The
-column will be removed if the checkbox is unchecked.
+=item &csv_initialize($r)
-=over 4
+=item &csv_outputstudent($r,$student)
-Input: $CacheData, $headings
+=item &csv_finish($r)
-$CacheData: A pointer to a hash tied to the cached data
+=cut
-$headings: An array of the names of the columns for the student
-information. They are used to know what are the student information columns
+#######################################################
+#######################################################
+{
+
+sub csv_initialize{
+ my ($r) = @_;
+ $r->print("
Not implemented yet
");
+ return;
+}
-Output: $present
+sub csv_outputstudent {
+ my ($r,$student) = @_;
+}
-$present: The string contains the first row of a table. Each column contains
-a checkbox which is left justified. Currently left justification is used
-for consistency of location over the column in which it presides.
+sub csv_finish {
+ my ($r) = @_;
+}
-=back
+}
-=cut
+#######################################################
+#######################################################
-sub CreateColumnSelectors {
- my ($infoHeadings, $sequenceHeadings, $sequenceKeys)=@_;
+=pod
- my $present = '';
- for(my $index=0; $index<(scalar @$infoHeadings); $index++) {
- $present .= '
'."\n";
- }
+Inputs:
- return $present;
-}
+=over 4
-#---- END Student Assessment Web Page ----------------------------------------
+=item $student
-#---- Student Assessment Worker Functions ------------------------------------
+=item $studentdata Hash ref to all student data
-sub FindSelectedStudent {
- my($cache, $selectedName, $students)=@_;
+=item $seq Hash ref, the sequence we are working on
- if($selectedName eq 'All Students' ||
- $selectedName eq 'No Student Selected') {
- return $selectedName;
- }
+=item $links if defined we will output links to each resource.
+
+=back
+
+=cut
- for(my $index=0; $index<(scalar @$students); $index++) {
- my $fullname = $cache->{$students->[$index].':fullname'};
- if($fullname eq $selectedName) {
- if($cache->{'StudentAssessmentMove'} eq 'next') {
- if($index == ((scalar @$students) - 1)) {
- $selectedName = $students->[0];
- return $selectedName;
+#######################################################
+#######################################################
+sub StudentPerformanceOnSequence {
+ my ($student,$studentdata,$seq,$links) = @_;
+ $links = 'no' if (! defined($links));
+ my $Str = '';
+ my ($sum,$max) = (0,0);
+ foreach my $resource (@{$seq->{'contents'}}) {
+ next if ($resource->{'type'} ne 'assessment');
+ my $resource_data = $studentdata->{$resource->{'symb'}};
+ my $value = '';
+ foreach my $partnum (@{$resource->{'parts'}}) {
+ $max++;
+ my $symbol = ' '; # default to space
+ #
+ if (exists($resource_data->{'resource.'.$partnum.'.solved'})) {
+ my $status = $resource_data->{'resource.'.$partnum.'.solved'};
+ if ($status eq 'correct_by_override') {
+ $symbol = '+';
+ $sum++;
+ } elsif ($status eq 'incorrect_by_override') {
+ $symbol = '-';
+ } elsif ($status eq 'ungraded_attempted') {
+ $symbol = '#';
+ } elsif ($status eq 'incorrect_attempted') {
+ $symbol = '.';
+ } elsif ($status eq 'excused') {
+ $symbol = 'x';
+ $max--;
+ } elsif ($status eq 'correct_by_student' &&
+ exists($resource_data->{'resource.'.$partnum.'.tries'})){
+ my $num = $resource_data->{'resource.'.$partnum.'.tries'};
+ if ($num > 9) {
+ $symbol = '*';
+ } elsif ($num > 0) {
+ $symbol = $num;
+ } else {
+ $symbol = ' ';
+ }
+ $sum++;
} else {
- $selectedName = $students->[$index+1];
- return $selectedName;
+ $symbol = ' ';
}
- } elsif($cache->{'StudentAssessmentMove'} eq 'previous') {
- if($index == 0) {
- $selectedName = $students->[-1];
- return $selectedName;
+ } else {
+ # Unsolved. Did they try?
+ if (exists($resource_data->{'resource.'.$partnum.'.tries'})){
+ $symbol = '.';
} else {
- $selectedName = $students->[$index-1];
- return $selectedName;
+ $symbol = ' ';
}
- } else {
- $selectedName = $students->[$index];
- return $selectedName;
}
- last;
+ #
+ if ($links eq 'yes' && $symbol ne ' ') {
+ $symbol = ''.$symbol.'';
+ }
+ $value .= $symbol;
}
+ $Str .= $value;
}
-
- return 'No Student Selected';
+ return ($Str,$sum,$max);
}
-=pod
-
-=item &ShouldShowColumn()
+#######################################################
+#######################################################
+sub StudentAverageTotal {
+ my ($cache, $students, $sequenceKeys)=@_;
+ my $Str = "\nSummary Tables:\n";
+ my %Correct = ();
+ my $ProblemsSolved = 0;
+ my $TotalProblems = 0;
+ my $StudentCount = 0;
+
+ foreach my $name (@$students) {
+ $StudentCount++;
+ foreach my $sequence (@$sequenceKeys) {
+ $Correct{$sequence} +=
+ $cache->{$name.':'.$sequence.':problemsCorrect'};
+ }
+ $ProblemsSolved += $cache->{$name.':problemsSolved'};
+ $TotalProblems += $cache->{$name.':totalProblems'};
+ }
+ if ($StudentCount) {
+ $ProblemsSolved = sprintf( "%.2f",
+ $ProblemsSolved/$StudentCount);
+ $TotalProblems /= $StudentCount;
+ } else {
+ $ProblemsSolved = 0;
+ $TotalProblems = 0;
+ }
-Determine if a specified column should be shown on the chart.
+ $Str .= '
'."\n";
+ $Str .= '
Students Count
'.
+ $StudentCount.'
'."\n";
+ $Str .= '
Total Problems
'.
+ $TotalProblems.'
'."\n";
+ $Str .= '
Average Correct
'.
+ $ProblemsSolved.'
'."\n";
+ $Str .= '
'."\n";
+
+ $Str .= '
'."\n";
+ $Str .= '
Title
Total Problems
'.
+ '
Average Correct
'."\n";
+ foreach my $S(@$sequenceKeys) {
+ my $title=$cache->{$S.':title'};
+ #$Str .= $cache->{$S.':problems'};
+ #my @problems=split(':', $cache->{$S.':problems'});
+ #my $pCount=scalar @problems;
+ my $pCount=MaxSeqPr($cache,@$students[0],$S);
+ my $crr;
+ if ($StudentCount) {
+ $crr=sprintf( "%.2f", $Correct{$S}/$StudentCount );
+ } else {
+ $crr="0.00";
+ }
+ $Str .= '
'.$title.
+ '
'.$pCount.
+ '
'.$crr.
+ '
'."\n";
+ }
-=over 4
+ $Str .= '
'."\n";
-Input: $cache, $test
+ return $Str;
+}
-$cache: A pointer to the hash tied to the cached data
+#######################################################
+#######################################################
-$test: The form name of the column (heading.$headingIndex) or
-(sequence.$sequenceIndex)
+=pod
-Output: 0 (false), 1 (true)
+=item &CreateLegend()
-=back
+This function returns a formatted string containing the legend for the
+chart. The legend describes the symbols used to represent grades for
+problems.
=cut
-sub ShouldShowColumns {
- my ($cache,$headings,$cacheKey)=@_;
-
- my @infoKeys=();
- my @infoHeadings=();
-
- my @sequenceKeys=();
- my @sequenceHeadings=();
+#######################################################
+#######################################################
+sub CreateLegend {
+ my $Str = "
".
+ " 1 correct by student in 1 try\n".
+ " 7 correct by student in 7 tries\n".
+ " * correct by student in more than 9 tries\n".
+ " + correct by hand grading or override\n".
+ " - incorrect by override\n".
+ " . incorrect attempted\n".
+ " # ungraded attempted\n".
+ " not attempted (blank field)\n".
+ " x excused".
+ "