# The LearningOnline Network with CAPA
#
# $Id: lonproblemanalysis.pm,v 1.72 2004/02/20 16:24:20 matthew 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/
#
package Apache::lonproblemanalysis;
use strict;
use Apache::lonnet();
use Apache::loncommon();
use Apache::lonhtmlcommon();
use Apache::loncoursedata();
use Apache::lonstatistics;
use Apache::lonlocal;
use Apache::lonstathelpers();
use Apache::lonstudentsubmissions();
use HTML::Entities();
use Time::Local();
use Spreadsheet::WriteExcel();
my $plotcolors = ['#33ff00',
'#0033cc', '#990000', '#aaaa66', '#663399', '#ff9933',
'#66ccff', '#ff9999', '#cccc33', '#660000', '#33cc66',
];
my @SubmitButtons = ({ name => 'PrevProblemAnalysis',
text => 'Previous Problem' },
{ name => 'ProblemAnalysis',
text => 'Analyze Problem Again' },
{ name => 'NextProblemAnalysis',
text => 'Next Problem' },
{ name => 'break'},
{ name => 'ClearCache',
text => 'Clear Caches' },
{ name => 'updatecaches',
text => 'Update Student Data' },
{ name => 'SelectAnother',
text => 'Choose a different Problem' },
{ name => 'ExcelOutput',
text => 'Produce Excel Output' });
sub BuildProblemAnalysisPage {
my ($r,$c)=@_;
#
my %Saveable_Parameters = ('Status' => 'scalar',
'Section' => 'array',
'NumPlots' => 'scalar',
'AnalyzeAs' => 'scalar',
'AnalyzeOver' => 'scalar',
);
&Apache::loncommon::store_course_settings('problem_analysis',
\%Saveable_Parameters);
&Apache::loncommon::restore_course_settings('problem_analysis',
\%Saveable_Parameters);
#
&Apache::lonstatistics::PrepareClasslist();
#
$r->print(&CreateInterface());
#
my @Students = @Apache::lonstatistics::Students;
#
if (@Students < 1) {
$r->print('<h2>There are no students in the sections selected</h2>');
}
#
&Apache::loncoursedata::clear_internal_caches();
if (exists($ENV{'form.ClearCache'}) ||
exists($ENV{'form.updatecaches'}) ||
(exists($ENV{'form.firstanalysis'}) &&
$ENV{'form.firstanalysis'} ne 'no')) {
&Apache::lonstatistics::Gather_Full_Student_Data($r);
}
if (! exists($ENV{'form.firstanalysis'})) {
$r->print('<input type="hidden" name="firstanalysis" value="yes" />');
} else {
$r->print('<input type="hidden" name="firstanalysis" value="no" />');
}
$r->rflush();
#
my $problem_types = '(option|radiobutton|numerical)';
if (exists($ENV{'form.problemchoice'}) &&
! exists($ENV{'form.SelectAnother'})) {
foreach my $button (@SubmitButtons) {
if ($button->{'name'} eq 'break') {
$r->print("<br />\n");
} else {
$r->print('<input type="submit" name="'.$button->{'name'}.'" '.
'value="'.&mt($button->{'text'}).'" />');
$r->print(' 'x5);
}
}
#
$r->print('<hr />');
$r->rflush();
#
# Determine which problem we are to analyze
my $current_problem = &Apache::lonstathelpers::get_target_from_id
($ENV{'form.problemchoice'});
#
my ($prev,$curr,$next) =
&Apache::lonstathelpers::get_prev_curr_next($current_problem,
$problem_types,
'response',
);
if (exists($ENV{'form.PrevProblemAnalysis'}) && defined($prev)) {
$current_problem = $prev;
} elsif (exists($ENV{'form.NextProblemAnalysis'}) && defined($next)) {
$current_problem = $next;
} else {
$current_problem = $curr;
}
#
# Store the current problem choice and send it out in the form
$ENV{'form.problemchoice'} =
&Apache::lonstathelpers::make_target_id($current_problem);
$r->print('<input type="hidden" name="problemchoice" value="'.
$ENV{'form.problemchoice'}.'" />');
#
if (! defined($current_problem->{'resource'})) {
$r->print('resource is undefined');
} else {
my $resource = $current_problem->{'resource'};
$r->print('<h1>'.$resource->{'title'}.'</h1>');
$r->print('<h3>'.$resource->{'src'}.'</h3>');
$r->print(&Apache::lonstathelpers::render_resource($resource));
$r->rflush();
my %Data = &Apache::lonstathelpers::get_problem_data
($resource->{'src'});
my $ProblemData = $Data{$current_problem->{'part'}.
'.'.
$current_problem->{'respid'}};
if ($current_problem->{'resptype'} eq 'option') {
&OptionResponseAnalysis($r,$current_problem,
$ProblemData,
\@Students);
} elsif ($current_problem->{'resptype'} eq 'radiobutton') {
&RadioResponseAnalysis($r,$current_problem,
$ProblemData,
\@Students);
} elsif ($current_problem->{'resptype'} eq 'numerical') {
# if (exists($ENV{'form.ExcelOutput'})) {
&Apache::lonstudentsubmissions::prepare_excel_output
($r,$current_problem,$ProblemData,\@Students);
# } else {
# &NumericalResponseAnalysis($r,$current_problem,
# $ProblemData,\@Students);
# }
} else {
$r->print('<h2>This analysis is not supported</h2>');
}
}
$r->print('<hr />');
} else {
$r->print('<input type="submit" name="ProblemAnalysis" value="'.
&mt('Analyze Problem').'" />');
$r->print(' 'x5);
$r->print('<h3>'.&mt('Please select a problem to analyze').'</h3>');
$r->print(&Apache::lonstathelpers::ProblemSelector
($problem_types));
}
}
#########################################################
#########################################################
##
## Numerical Response Routines
##
#########################################################
#########################################################
sub NumericalResponseAnalysis {
my ($r,$problem,$ProblemData,$Students) = @_;
$r->print('<h2>This analysis is not yet supported</h2>');
my ($resource,$respid) = ($problem->{'resource'},
$problem->{'respid'});
my $analysis_html;
my $PerformanceData =
&Apache::loncoursedata::get_response_data
($Students,$resource->{'symb'},$respid);
if (! defined($PerformanceData) ||
ref($PerformanceData) ne 'ARRAY' ) {
$analysis_html = '<h2>'.
&mt('There is no submission data for this resource').
'</h2>';
$r->print($analysis_html);
return;
}
my ($max,$min) = &GetStudentAnswers($r,$problem,$Students);
$r->print('Maximum = '.$max.' Minimum = '.$min);
my $max_students = 0;
my %Data;
foreach my $student (@$Students) {
my $answer = $student->{'answer'};
$Data{$answer}++;
if ($max_students < $Data{$answer}) {
$max_students = $Data{$answer};
}
}
foreach (5,10,20,25,50,75,100,150,200,250,500,1000,1500,2000,2500,5000) {
if ($max_students < $_) {
$max_students = $_;
last;
}
}
my @Labels = sort {$a <=> $b } keys(%Data);
$r->print('number of labels = '.scalar(@Labels));
my @PlotData = @Data{@Labels};
$r->print('number of PlotData = '.scalar(@PlotData));
my $graph =
&Apache::loncommon::DrawXYGraph('Correct Answer Distribution',
'Correct Answer',
'Number of students',
$max_students,
undef,
\@Labels,
[\@PlotData],
(xskip=>10));
$r->print($graph);
return;
}
sub GetStudentAnswers {
my ($r,$problem,$Students) = @_;
my %Answers;
my ($resource,$partid,$respid) = ($problem->{'resource'},
$problem->{'part'},
$problem->{'respid'});
# Open progress window
my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
($r,'Student Answer Compilation Status',
'Student Answer Compilation Progress', scalar(@$Students));
$r->print("<table>\n");
$r->rflush();
foreach my $student (@$Students) {
my $sname = $student->{'username'};
my $sdom = $student->{'domain'};
my $answer = &Apache::lonstathelpers::analyze_problem_as_student
($resource,$sname,$sdom,$partid,$respid);
&Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
&mt('last student'));
$student->{'answer'} = $answer;
}
$r->print("</table>\n");
$r->rflush();
# close progress window
&Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
return;
}
sub build_student_data_worksheet {
my ($workbook,$format) = @_;
my $rows_output = 3;
my $cols_output = 0;
my $worksheet = $workbook->addworksheet('Student Data');
$worksheet->write($rows_output++,0,'Student Data',$format->{'h3'});
my @Headers = ('full name','username','domain','section',
"student\nnumber",'identifier');
$worksheet->write_row($rows_output++,0,\@Headers,$format->{'header'});
my @Students = @Apache::lonstatistics::Students;
my $studentrows = &Apache::loncoursedata::get_student_data(\@Students);
my %ids;
foreach my $row (@$studentrows) {
my ($mysqlid,$student) = @$row;
$ids{$student}=$mysqlid;
}
foreach my $student (@Students) {
my $name_domain = $student->{'username'}.':'.$student->{'domain'};
$worksheet->write_row($rows_output++,0,
[$student->{'fullname'},
$student->{'username'},$student->{'domain'},
$student->{'section'},$student->{'id'},
$ids{$name_domain}]);
}
return $worksheet;
}
#########################################################
#########################################################
##
## Radio Response Routines
##
#########################################################
#########################################################
sub RadioResponseAnalysis {
my ($r,$problem,$ProblemData,$Students) = @_;
my ($resource,$respid) = ($problem->{'resource'},
$problem->{'respid'});
my $analysis_html;
my $PerformanceData =
&Apache::loncoursedata::get_response_data
($Students,$resource->{'symb'},$respid);
if (! defined($PerformanceData) ||
ref($PerformanceData) ne 'ARRAY' ) {
$analysis_html = '<h2>'.
&mt('There is no submission data for this resource').
'</h2>';
$r->print($analysis_html);
return;
}
if (exists($ENV{'form.ExcelOutput'})) {
$analysis_html .= &RR_Excel_output($r,$problem->{'resource'},
$PerformanceData,$ProblemData);
} elsif ($ENV{'form.AnalyzeOver'} eq 'Tries') {
$analysis_html .= &RR_Tries_Analysis($r,$problem->{'resource'},
$PerformanceData,$ProblemData);
} elsif ($ENV{'form.AnalyzeOver'} eq 'Time') {
$analysis_html .= &RR_Time_Analysis($r,$problem->{'resource'},
$PerformanceData,$ProblemData);
} else {
$analysis_html .= '<h2>'.
&mt('The analysis you have selected is not supported at this time').
'</h2>';
}
$r->print($analysis_html);
}
sub RR_Excel_output {
my ($r,$PerformanceData,$ProblemData) = @_;
return '<h1>No!</h1>';
}
sub RR_Tries_Analysis {
my ($r,$resource,$PerformanceData,$ProblemData) = @_;
my $analysis_html;
my $mintries = 1;
my $maxtries = $ENV{'form.NumPlots'};
my ($table,$Foils,$Concepts) = &build_foil_index($ProblemData);
if ((! defined($Concepts)) || ((@$Concepts < 2) &&
($ENV{'form.AnalyzeAs'} ne 'Foils'))) {
$table = '<h3>'.
&mt('Not enough data for concept analysis. '.
'Performing Foil Analysis').
'</h3>'.$table;
$ENV{'form.AnalyzeAs'} = 'Foils';
}
$analysis_html .= $table;
my @TryData = &RR_tries_data_analysis($r,$PerformanceData);
# if ($ENV{'form.AnalyzeAs'} eq 'Foils') {
$analysis_html .= &RR_Tries_Foil_Analysis($mintries,$maxtries,$Foils,
\@TryData,$ProblemData);
# } else {
# $analysis_html = &RR_Tries_Concept_Analysis($mintries,$maxtries,
# $Concepts,
# \@TryData,
# $ProblemData);
# }
return $analysis_html;
}
sub RR_tries_data_analysis {
my ($r,$Attempt_data) = @_;
my @TryData;
foreach my $attempt (@$Attempt_data) {
my %Attempt = &hashify_attempt($attempt);
my ($answer,undef) = split('=',$Attempt{'submission'});
$TryData[$Attempt{'tries'}]->{$answer}++;
}
return @TryData;
}
sub RR_Time_Analysis {
my ($r,$PerformanceData,$ProblemData) = @_;
my $html;
return $html;
}
sub RR_Tries_Foil_Analysis {
my ($min,$max,$Foils,$TryData,$ProblemData) = @_;
my $html;
#
# Compute the data neccessary to make the plots
for (my $try=$min;$try<=$max;$try++) {
my @PlotData_Correct;
my @PlotData_Incorrect;
next if ($try > scalar(@{$TryData}));
next if (! defined($TryData->[$try]));
my %DataSet = %{$TryData->[$try]};
my $total = 0;
foreach my $foilid (@$Foils) {
$total += $DataSet{$foilid};
}
foreach my $foilid (@$Foils) {
if ($total == 0) {
push (@PlotData_Correct,0);
push (@PlotData_Incorrect,0);
} else {
if ($ProblemData->{'_Foils'}->{$foilid}->{'value'} eq 'true') {
push (@PlotData_Correct,
int(100*$DataSet{$foilid}/$total));
push (@PlotData_Incorrect,0);
} else {
push (@PlotData_Correct,0);
push (@PlotData_Incorrect,
int(100*$DataSet{$foilid}/$total));
}
}
}
my $title='Attempt '.$try;
my $xlabel = $total.' Submissions';
$html.= &Apache::loncommon::DrawBarGraph($title,
$xlabel,
'Percent Choosing',
100,
['#33ff00','#ff3300'],
undef,
\@PlotData_Correct,
\@PlotData_Incorrect);
}
return $html;
}
sub RR_Tries_Concept_Analysis {
my ($min,$max,$Concepts,$ResponseData,$ProblemData) = @_;
my $html;
return $html;
}
sub RR_Time_Foil_Analysis {
my ($min,$max,$Foils,$ResponseData,$ProblemData) = @_;
my $html;
return $html;
}
sub RR_Time_Concept_Analysis {
my ($min,$max,$Concepts,$ResponseData,$ProblemData) = @_;
my $html;
return $html;
}
sub get_Radio_problem_data {
my ($url) = @_;
my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze'));
(my $garbage,$Answ)=split('_HASH_REF__',$Answ,2);
my %Answer = &Apache::lonnet::str2hash($Answ);
my %Partdata;
foreach my $part (@{$Answer{'parts'}}) {
while (my($key,$value) = each(%Answer)) {
# if (ref($value) eq 'ARRAY') {
# &Apache::lonnet::logthis('is ref part:'.$part.' '.$key.'='.join(',',@$value));
# } else {
# &Apache::lonnet::logthis('notref part:'.$part.' '.$key.'='.$value);
# }
next if ($key !~ /^$part/);
$key =~ s/^$part\.//;
if ($key eq 'foils') {
$Partdata{$part}->{'_Foils'}=$value;
} elsif ($key eq 'options') {
$Partdata{$part}->{'_Options'}=$value;
} elsif ($key eq 'shown') {
$Partdata{$part}->{'_Shown'}=$value;
} elsif ($key =~ /^foil.value.(.*)$/) {
$Partdata{$part}->{$1}->{'value'}=$value;
} elsif ($key =~ /^foil.text.(.*)$/) {
$Partdata{$part}->{$1}->{'text'}=$value;
}
}
}
return %Partdata;
}
#########################################################
#########################################################
##
## Option Response Routines
##
#########################################################
#########################################################
sub OptionResponseAnalysis {
my ($r,$problem,$ProblemData,$Students) = @_;
my ($resource,$respid) = ($problem->{'resource'},
$problem->{'respid'});
# Note: part data is not needed.
my $PerformanceData =
&Apache::loncoursedata::get_response_data
($Students,$resource->{'symb'},$respid);
if (! defined($PerformanceData) ||
ref($PerformanceData) ne 'ARRAY' ) {
$r->print('<h2>'.
&mt('There is no student data for this problem.').
'</h2>');
} else {
$r->rflush();
if (exists($ENV{'form.ExcelOutput'})) {
my $result = &OR_excel_sheet($r,$resource,
$PerformanceData,
$ProblemData);
$r->print($result);
$r->rflush();
} else {
if ($ENV{'form.AnalyzeOver'} eq 'Tries') {
my $analysis_html = &OR_tries_analysis($r,
$PerformanceData,
$ProblemData);
$r->print($analysis_html);
$r->rflush();
} elsif ($ENV{'form.AnalyzeOver'} eq 'Time') {
my $analysis_html = &OR_time_analysis($PerformanceData,
$ProblemData);
$r->print($analysis_html);
$r->rflush();
} else {
$r->print('<h2>'.
&mt('The analysis you have selected is '.
'not supported at this time').
'</h2>');
}
}
}
}
#########################################################
#
# Option Response: Tries Analysis
#
#########################################################
sub OR_tries_analysis {
my ($r,$PerformanceData,$ORdata) = @_;
my $mintries = 1;
my $maxtries = $ENV{'form.NumPlots'};
my ($table,$Foils,$Concepts) = &build_foil_index($ORdata);
if ((@$Concepts < 2) && ($ENV{'form.AnalyzeAs'} ne 'Foils')) {
$table = '<h3>'.
&mt('Not enough data for concept analysis. '.
'Performing Foil Analysis').
'</h3>'.$table;
$ENV{'form.AnalyzeAs'} = 'Foils';
}
my %ResponseData = &OR_analyze_by_tries($r,$PerformanceData,
$mintries,$maxtries);
my $analysis = '';
if ($ENV{'form.AnalyzeAs'} eq 'Foils') {
$analysis = &OR_Tries_Foil_Analysis($mintries,$maxtries,$Foils,
\%ResponseData,$ORdata);
} else {
$analysis = &OR_Tries_Concept_Analysis($mintries,$maxtries,
$Concepts,\%ResponseData,$ORdata);
}
$table .= $analysis;
return $table;
}
sub OR_Tries_Foil_Analysis {
my ($mintries,$maxtries,$Foils,$respdat,$ORdata) = @_;
my %ResponseData = %$respdat;
#
# Compute the data neccessary to make the plots
my @PlotData;
foreach my $foilid (@$Foils) {
for (my $i=$mintries;$i<=$maxtries;$i++) {
if ($ResponseData{$foilid}->[$i]->{'_total'} == 0) {
push(@{$PlotData[$i]->{'_correct'}},0);
} else {
push(@{$PlotData[$i]->{'_correct'}},
100*$ResponseData{$foilid}->[$i]->{'_correct'}/
$ResponseData{$foilid}->[$i]->{'_total'});
}
foreach my $option (@{$ORdata->{'_Options'}}) {
push(@{$PlotData[$i]->{'_total'}},
$ResponseData{$foilid}->[$i]->{'_total'});
if ($ResponseData{$foilid}->[$i]->{'_total'} == 0) {
push (@{$PlotData[$i]->{$option}},0);
} else {
if ($ResponseData{$foilid}->[$i]->{'_total'} ==
$ResponseData{$foilid}->[$i]->{'_correct'}) {
push(@{$PlotData[$i]->{$option}},0);
} else {
push (@{$PlotData[$i]->{$option}},
100 * $ResponseData{$foilid}->[$i]->{$option} /
($ResponseData{$foilid}->[$i]->{'_total'} -
$ResponseData{$foilid}->[$i]->{'_correct'}));
}
}
}
}
}
#
# Build a table for the plots
my $analysis_html = "<table>\n";
my $foilkey = &build_option_index($ORdata);
for (my $i=$mintries;$i<=$maxtries;$i++) {
my $count = $ResponseData{'_total'}->[$i];
if ($count == 0) {
$count = 'no submissions';
} elsif ($count == 1) {
$count = '1 submission';
} else {
$count = $count.' submissions';
}
my $title = 'Attempt '.$i.', '.$count;
my @Datasets;
foreach my $option ('_correct',@{$ORdata->{'_Options'}}) {
next if (! exists($PlotData[$i]->{$option}));
push(@Datasets,$PlotData[$i]->{$option});
}
my $correctgraph = &Apache::loncommon::DrawBarGraph
($title,'Foil Number','Percent Correct',
100,$plotcolors,undef,$Datasets[0]);
$analysis_html.= '<tr><td>'.$correctgraph.'</td>';
##
##
next if (! defined($Datasets[0]));
for (my $i=0; $i< scalar(@{$Datasets[0]});$i++) {
$Datasets[0]->[$i]=0;
}
$count = $ResponseData{'_total'}->[$i]-$ResponseData{'_correct'}->[$i];
if ($count == 0) {
$count = 'no submissions';
} elsif ($count == 1) {
$count = '1 submission';
} else {
$count = $count.' submissions';
}
$title = 'Attempt '.$i.', '.$count;
my $incorrectgraph = &Apache::loncommon::DrawBarGraph
($title,'Foil Number','% Option Chosen Incorrectly',
100,$plotcolors,undef,@Datasets);
$analysis_html.= '<td>'.$incorrectgraph.'</td>';
$analysis_html.= '<td>'.$foilkey."<td></tr>\n";
}
$analysis_html .= "</table>\n";
return $analysis_html;
}
sub OR_Tries_Concept_Analysis {
my ($mintries,$maxtries,$Concepts,$respdat,$ORdata) = @_;
my %ResponseData = %$respdat;
my $analysis_html = "<table>\n";
#
# Compute the data neccessary to make the plots
my @PlotData;
# Concept analysis
#
# Note: we do not bother with characterizing the students incorrect
# answers at the concept level because an incorrect answer for one foil
# may be a correct answer for another foil.
my %ConceptData;
foreach my $concept (@{$Concepts}) {
for (my $i=$mintries;$i<=$maxtries;$i++) {
#
# Gather the per-attempt data
my $cdata = $ConceptData{$concept}->[$i];
foreach my $foilid (@{$concept->{'foils'}}) {
$cdata->{'_correct'} +=
$ResponseData{$foilid}->[$i]->{'_correct'};
$cdata->{'_total'} +=
$ResponseData{$foilid}->[$i]->{'_total'};
}
push (@{$PlotData[$i]->{'_total'}},$cdata->{'_total'});
if ($cdata->{'_total'} == 0) {
push (@{$PlotData[$i]->{'_correct'}},0);
} else {
push (@{$PlotData[$i]->{'_correct'}},
100*$cdata->{'_correct'}/$cdata->{'_total'});
}
}
}
# Build a table for the plots
for (my $i=$mintries;$i<=$maxtries;$i++) {
my $minstu = $PlotData[$i]->{'_total'}->[0];
my $maxstu = $PlotData[$i]->{'_total'}->[0];
foreach my $count (@{$PlotData[$i]->{'_total'}}) {
if ($minstu > $count) {
$minstu = $count;
}
if ($maxstu < $count) {
$maxstu = $count;
}
}
$maxstu = 0 if (! defined($maxstu));
$minstu = 0 if (! defined($minstu));
my $title;
my $count = $ResponseData{'_total'}->[$i];
if ($count == 0) {
$count = 'no submissions';
} elsif ($count == 1) {
$count = '1 submission';
} else {
$count = $count.' submissions';
}
$title = 'Attempt '.$i.', '.$count;
my $graphlink = &Apache::loncommon::DrawBarGraph
($title,'Concept Number','Percent Correct',
100,$plotcolors,undef,$PlotData[$i]->{'_correct'});
$analysis_html.= '<tr><td>'.$graphlink."</td></tr>\n";
}
$analysis_html .= "</table>\n";
return $analysis_html;
}
sub OR_analyze_by_tries {
my ($r,$PerformanceData,$mintries,$maxtries) = @_;
my %Trydata;
$mintries = 1 if (! defined($mintries) || $mintries < 1);
$maxtries = $mintries if (! defined($maxtries) || $maxtries < $mintries);
foreach my $row (@$PerformanceData) {
next if (! defined($row));
my $tries = &get_tries_from_row($row);
my %Row = &Process_OR_Row($row);
next if (! %Row);
while (my ($foilid,$href) = each(%Row)) {
if (! ref($href)) {
$Trydata{$foilid}->[$tries] += $href;
next;
}
while (my ($option,$value) = each(%$href)) {
$Trydata{$foilid}->[$tries]->{$option}+=$value;
}
}
}
return %Trydata;
}
#########################################################
#
# Option Response: Time Analysis
#
#########################################################
sub OR_time_analysis {
my ($PerformanceData,$ORdata) = @_;
my ($table,$Foils,$Concepts) = &build_foil_index($ORdata);
if ((@$Concepts < 2) && ($ENV{'form.AnalyzeAs'} ne 'Foils')) {
$table = '<h3>'.
&mt('Not enough data for concept analysis. '.
'Performing Foil Analysis').
'</h3>'.$table;
$ENV{'form.AnalyzeAs'} = 'Foils';
}
my $num_plots = $ENV{'form.NumPlots'};
my $num_data = scalar(@$PerformanceData)-1;
my $percent = sprintf('%2f',100/$num_plots);
#
$table .= "<table>\n";
for (my $i=0;$i<$num_plots;$i++) {
##
my $starttime = &Apache::lonhtmlcommon::get_date_from_form
('startdate_'.$i);
my $endtime = &Apache::lonhtmlcommon::get_date_from_form
('enddate_'.$i);
if (! defined($starttime) || ! defined($endtime)) {
my $sec_in_day = 86400;
my $last_sub_time = &get_time_from_row($PerformanceData->[-1]);
my ($sday,$smon,$syear);
(undef,undef,undef,$sday,$smon,$syear) =
localtime($last_sub_time - $sec_in_day*$i);
$starttime = &Time::Local::timelocal(0,0,0,$sday,$smon,$syear);
$endtime = $starttime + $sec_in_day;
if ($i == ($num_plots -1 )) {
$starttime = &get_time_from_row($PerformanceData->[0]);
}
}
my $startdateform = &Apache::lonhtmlcommon::date_setter
('Statistics','startdate_'.$i,$starttime);
my $enddateform = &Apache::lonhtmlcommon::date_setter
('Statistics','enddate_'.$i,$endtime);
#
my $begin_index;
my $end_index;
my $j;
while (++$j < scalar(@$PerformanceData)) {
last if (&get_time_from_row($PerformanceData->[$j])
> $starttime);
}
$begin_index = $j;
while (++$j < scalar(@$PerformanceData)) {
last if (&get_time_from_row($PerformanceData->[$j]) > $endtime);
}
$end_index = $j;
##
my $interval = {
begin_index => $begin_index,
end_index => $end_index,
startdateform => $startdateform,
enddateform => $enddateform,
};
if ($ENV{'form.AnalyzeAs'} eq 'Foils') {
$table .= &OR_Foil_Time_Analysis($PerformanceData,$ORdata,$Foils,
$interval);
} else {
$table .= &OR_Concept_Time_Analysis($PerformanceData,$ORdata,
$Concepts,$interval);
}
}
#
return $table;
}
sub OR_Foil_Time_Analysis {
my ($PerformanceData,$ORdata,$Foils,$interval) = @_;
my $analysis_html;
my $foilkey = &build_option_index($ORdata);
my ($begin_index,$end_index) = ($interval->{'begin_index'},
$interval->{'end_index'});
my %TimeData;
#
# Compute the number getting the foils correct or incorrects
for (my $j=$begin_index;$j<=$end_index;$j++) {
my $row = $PerformanceData->[$j];
next if (! defined($row));
my %Row = &Process_OR_Row($row);
while (my ($foilid,$href) = each(%Row)) {
if (! ref($href)) {
$TimeData{$foilid} += $href;
next;
}
while (my ($option,$value) = each(%$href)) {
$TimeData{$foilid}->{$option}+=$value;
}
}
}
my @Plotdata;
foreach my $foil (@$Foils) {
my $total = $TimeData{$foil}->{'_total'};
if ($total == 0) {
push(@{$Plotdata[0]},0);
} else {
push(@{$Plotdata[0]},
100 * $TimeData{$foil}->{'_correct'} / $total);
}
my $total_incorrect = $total - $TimeData{$foil}->{'_correct'};
my $optionidx = 1;
foreach my $option (@{$ORdata->{'_Options'}}) {
if ($total_incorrect == 0) {
push(@{$Plotdata[$optionidx]},0);
} else {
push(@{$Plotdata[$optionidx]},
100 * $TimeData{$foil}->{$option} / $total_incorrect);
}
} continue {
$optionidx++;
}
}
#
# Create the plot
my $count = $end_index-$begin_index;
my $title;
if ($count == 0) {
$title = 'no submissions';
} elsif ($count == 1) {
$title = 'one submission';
} else {
$title = $count.' submissions';
}
my $correctplot = &Apache::loncommon::DrawBarGraph($title,
'Foil Number',
'Percent Correct',
100,
$plotcolors,
undef,
$Plotdata[0]);
for (my $j=0; $j< scalar(@{$Plotdata[0]});$j++) {
$Plotdata[0]->[$j]=0;
}
$count = $end_index-$begin_index-$TimeData{'_correct'};
if ($count == 0) {
$title = 'no submissions';
} elsif ($count == 1) {
$title = 'one submission';
} else {
$title = $count.' submissions';
}
my $incorrectplot = &Apache::loncommon::DrawBarGraph($title,
'Foil Number',
'Incorrect Option Choice',
100,
$plotcolors,
undef,
@Plotdata);
$analysis_html.='<tr>'.
'<td>'.$correctplot.'</td>'.
'<td>'.$incorrectplot.'</td>'.
'<td align="left" valign="top">'.$foilkey.'</td>'."</tr>\n";
$analysis_html.= '<tr>'.'<td colspan="3">'.
'<b>Start Time</b>:'.
' '.$interval->{'startdateform'}.'<br />'.
'<b>End Time</b> : '.
' '.$interval->{'enddateform'}.'<br />'.
# '<b>Plot Title</b> :'.
# (" "x3).$interval->{'titleform'}.
'</td>'.
"</tr>\n";
return $analysis_html;
}
sub OR_Concept_Time_Analysis {
my ($PerformanceData,$ORdata,$Concepts,$interval) = @_;
my $analysis_html;
##
## Determine starttime, endtime, startindex, endindex
my ($begin_index,$end_index) = ($interval->{'begin_index'},
$interval->{'end_index'});
my %TimeData;
#
# Compute the number getting the foils correct or incorrects
for (my $j=$begin_index;$j<=$end_index;$j++) {
my $row = $PerformanceData->[$j];
next if (! defined($row));
my %Row = &Process_OR_Row($row);
while (my ($foilid,$href) = each(%Row)) {
if (! ref($href)) {
$TimeData{$foilid} += $href;
next;
}
while (my ($option,$value) = each(%$href)) {
$TimeData{$foilid}->{$option}+=$value;
}
}
}
#
# Put the data in plottable form
my @Plotdata;
foreach my $concept (@$Concepts) {
my ($total,$correct);
foreach my $foil (@{$concept->{'foils'}}) {
$total += $TimeData{$foil}->{'_total'};
$correct += $TimeData{$foil}->{'_correct'};
}
if ($total == 0) {
push(@Plotdata,0);
} else {
push(@Plotdata,100 * $correct / $total);
}
}
#
# Create the plot
my $title = ($end_index - $begin_index).' submissions';
my $correctplot = &Apache::loncommon::DrawBarGraph($title,
'Concept Number',
'Percent Correct',
100,
$plotcolors,
undef,
\@Plotdata);
$analysis_html.='<tr>'.
'<td>'.$correctplot.'</td>'.
'<td align="left" valign="top">'.
'<b>Start Time</b>: '.$interval->{'startdateform'}.'<br />'.
'<b>End Time</b> : '.
' '.$interval->{'enddateform'}.'<br />'.
# '<b>Plot Title</b> :'.(" "x3).
# $interval->{'titleform'}.
'</td>'.
"</tr>\n";
return $analysis_html;
}
#########################################################
#########################################################
##
## Excel output
##
#########################################################
#########################################################
sub OR_excel_sheet {
my ($r,$resource,$PerformanceData,$ORdata) = @_;
my $response = '';
my (undef,$Foils,$Concepts) = &build_foil_index($ORdata);
#
# Create excel worksheet
my $filename = '/prtspool/'.
$ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.
time.'_'.rand(1000000000).'.xls';
my $workbook = Spreadsheet::WriteExcel->new('/home/httpd'.$filename);
if (! defined($workbook)) {
$r->log_error("Error creating excel spreadsheet $filename: $!");
$r->print('<p>'.&mt("Unable to create new Excel file. ".
"This error has been logged. ".
"Please alert your LON-CAPA administrator").
'</p>');
return undef;
}
#
$workbook->set_tempdir('/home/httpd/perl/tmp');
my $format = &Apache::loncommon::define_excel_formats($workbook);
#
# Create and populate main worksheets
my $problem_data_sheet = $workbook->addworksheet('Problem Data');
my $student_data_sheet = &build_student_data_worksheet($workbook,$format);
my $response_data_sheet = $workbook->addworksheet('Response Data');
foreach my $sheet ($problem_data_sheet,$student_data_sheet,
$response_data_sheet) {
$sheet->write(0,0,$resource->{'title'},$format->{'h2'});
$sheet->write(1,0,$resource->{'src'},$format->{'h3'});
}
#
my $result;
$result = &OR_build_problem_data_worksheet($problem_data_sheet,$format,
$Concepts,$ORdata);
if ($result ne 'okay') {
# Do something useful
}
$result = &OR_build_response_data_worksheet($response_data_sheet,$format,
$PerformanceData,$Foils,
$ORdata);
if ($result ne 'okay') {
# Do something useful
}
$response_data_sheet->activate();
#
# Close the excel file
$workbook->close();
#
# Write a link to allow them to download it
$result .= '<h2>'.&mt('Excel Raw Data Output').'</h2>'.
'<p><a href="'.$filename.'">'.
&mt('Your Excel spreadsheet.').
'</a></p>'."\n";
return $result;
}
sub OR_build_problem_data_worksheet {
my ($worksheet,$format,$Concepts,$ORdata) = @_;
my $rows_output = 3;
my $cols_output = 0;
$worksheet->write($rows_output++,0,'Problem Structure',$format->{'h3'});
##
##
my @Headers;
if (@$Concepts > 1) {
@Headers = ("Concept\nNumber",'Concept',"Foil\nNumber",
'Foil Name','Foil Text','Correct value');
} else {
@Headers = ('Foil Number','FoilName','Foil Text','Correct value');
}
$worksheet->write_row($rows_output++,0,\@Headers,$format->{'header'});
my %Foildata = %{$ORdata->{'_Foils'}};
my $conceptindex = 1;
my $foilindex = 1;
foreach my $concept (@$Concepts) {
my @FoilsInConcept = @{$concept->{'foils'}};
my $firstfoil = shift(@FoilsInConcept);
if (@$Concepts > 1) {
$worksheet->write_row($rows_output++,0,
[$conceptindex,
$concept->{'name'},
$foilindex++,
$Foildata{$firstfoil}->{'name'},
$Foildata{$firstfoil}->{'text'},
$Foildata{$firstfoil}->{'value'},]);
} else {
$worksheet->write_row($rows_output++,0,
[ $foilindex++,
$Foildata{$firstfoil}->{'name'},
$Foildata{$firstfoil}->{'text'},
$Foildata{$firstfoil}->{'value'},]);
}
foreach my $foilid (@FoilsInConcept) {
if (@$Concepts > 1) {
$worksheet->write_row($rows_output++,0,
['',
'',
$foilindex,
$Foildata{$foilid}->{'name'},
$Foildata{$foilid}->{'text'},
$Foildata{$foilid}->{'value'},]);
} else {
$worksheet->write_row($rows_output++,0,
[$foilindex,
$Foildata{$foilid}->{'name'},
$Foildata{$foilid}->{'text'},
$Foildata{$foilid}->{'value'},]);
}
} continue {
$foilindex++;
}
} continue {
$conceptindex++;
}
$rows_output++;
$rows_output++;
##
## Option data output
$worksheet->write($rows_output++,0,'Options',$format->{'header'});
foreach my $string (@{$ORdata->{'_Options'}}) {
$worksheet->write($rows_output++,0,$string);
}
return 'okay';
}
sub OR_build_response_data_worksheet {
my ($worksheet,$format,$PerformanceData,$Foils,$ORdata)=@_;
my $rows_output = 3;
my $cols_output = 0;
$worksheet->write($rows_output++,0,'Response Data',$format->{'h3'});
$worksheet->set_column(1,1,20);
$worksheet->set_column(2,2,13);
my @Headers = ('identifier','time','award detail','attempt');
foreach my $foil (@$Foils) {
push (@Headers,$foil.' submission');
push (@Headers,$foil.' grading');
}
$worksheet->write_row($rows_output++,0,\@Headers,$format->{'header'});
#
foreach my $row (@$PerformanceData) {
next if (! defined($row));
my ($student,$award,$grading,$submission,$time,$tries) = @$row;
my @Foilgrades = split('&',$grading);
my @Foilsubs = split('&',$submission);
my %ResponseData;
for (my $j=0;$j<=$#Foilgrades;$j++) {
my ($foilid,$correct) = split('=',$Foilgrades[$j]);
my (undef,$submission) = split('=',$Foilsubs[$j]);
$submission = &Apache::lonnet::unescape($submission);
$ResponseData{$foilid.' submission'}=$submission;
$ResponseData{$foilid.' award'}=$correct;
}
$worksheet->write($rows_output,$cols_output++,$student);
$worksheet->write($rows_output,$cols_output++,
&Apache::lonstathelpers::calc_serial($time),$format->{'date'});
$worksheet->write($rows_output,$cols_output++,$award);
$worksheet->write($rows_output,$cols_output++,$tries);
foreach my $foilid (@$Foils) {
$worksheet->write($rows_output,$cols_output++,
$ResponseData{$foilid.' submission'});
$worksheet->write($rows_output,$cols_output++,
$ResponseData{$foilid.' award'});
}
$rows_output++;
$cols_output = 0;
}
return;
}
sub build_foil_index {
my ($ORdata) = @_;
return if (! exists($ORdata->{'_Foils'}));
my %Foildata = %{$ORdata->{'_Foils'}};
my @Foils = sort(keys(%Foildata));
my %Concepts;
foreach my $foilid (@Foils) {
push(@{$Concepts{$Foildata{$foilid}->{'_Concept'}}},
$foilid);
}
undef(@Foils);
# Having gathered the concept information in a hash, we now translate it
# into an array because we need to be consistent about order.
# Also put the foils in order, too.
my $sortfunction = sub {
my %Numbers = (one => 1,
two => 2,
three => 3,
four => 4,
five => 5,
six => 6,
seven => 7,
eight => 8,
nine => 9,
ten => 10,);
my $a1 = lc($a);
my $b1 = lc($b);
if (exists($Numbers{$a1})) {
$a1 = $Numbers{$a1};
}
if (exists($Numbers{$b1})) {
$b1 = $Numbers{$b1};
}
if (($a1 =~/^\d+$/) && ($b1 =~/^\d+$/)) {
return $a1 <=> $b1;
} else {
return $a1 cmp $b1;
}
};
my @Concepts;
foreach my $concept (sort $sortfunction (keys(%Concepts))) {
if (! defined($Concepts{$concept})) {
$Concepts{$concept}=[];
# next;
}
push(@Concepts,{ name => $concept,
foils => [@{$Concepts{$concept}}]});
push(@Foils,(@{$Concepts{$concept}}));
}
#
# Build up the table of row labels.
my $table = '<table border="1" >'."\n";
if (@Concepts > 1) {
$table .= '<tr>'.
'<th>'.&mt('Concept Number').'</th>'.
'<th>'.&mt('Concept').'</th>'.
'<th>'.&mt('Foil Number').'</th>'.
'<th>'.&mt('Foil Name').'</th>'.
'<th>'.&mt('Foil Text').'</th>'.
'<th>'.&mt('Correct Value').'</th>'.
"</tr>\n";
} else {
$table .= '<tr>'.
'<th>'.&mt('Foil Number').'</th>'.
'<th>'.&mt('Foil Name').'</th>'.
'<th>'.&mt('Foil Text').'</th>'.
'<th>'.&mt('Correct Value').'</th>'.
"</tr>\n";
}
my $conceptindex = 1;
my $foilindex = 1;
foreach my $concept (@Concepts) {
my @FoilsInConcept = @{$concept->{'foils'}};
my $firstfoil = shift(@FoilsInConcept);
if (@Concepts > 1) {
$table .= '<tr>'.
'<td>'.$conceptindex.'</td>'.
'<td>'.&HTML::Entities::encode($concept->{'name'}).'</td>'.
'<td>'.$foilindex++.'</td>'.
'<td>'.&HTML::Entities::encode($Foildata{$firstfoil}->{'name'}).'</td>'.
'<td>'.$Foildata{$firstfoil}->{'text'}.'</td>'.
'<td>'.&HTML::Entities::encode($Foildata{$firstfoil}->{'value'}).'</td>'.
"</tr>\n";
} else {
$table .= '<tr>'.
'<td>'.$foilindex++.'</td>'.
'<td>'.&HTML::Entities::encode($Foildata{$firstfoil}->{'name'}).'</td>'.
'<td>'.$Foildata{$firstfoil}->{'text'}.'</td>'.
'<td>'.&HTML::Entities::encode($Foildata{$firstfoil}->{'value'}).'</td>'.
"</tr>\n";
}
foreach my $foilid (@FoilsInConcept) {
if (@Concepts > 1) {
$table .= '<tr>'.
'<td></td>'.
'<td></td>'.
'<td>'.$foilindex.'</td>'.
'<td>'.&HTML::Entities::encode($Foildata{$foilid}->{'name'}).'</td>'.
'<td>'.$Foildata{$foilid}->{'text'}.'</td>'.
'<td>'.&HTML::Entities::encode($Foildata{$foilid}->{'value'}).'</td>'.
"</tr>\n";
} else {
$table .= '<tr>'.
'<td>'.$foilindex.'</td>'.
'<td>'.&HTML::Entities::encode($Foildata{$foilid}->{'name'}).'</td>'.
'<td>'.$Foildata{$foilid}->{'text'}.'</td>'.
'<td>'.&HTML::Entities::encode($Foildata{$foilid}->{'value'}).'</td>'.
"</tr>\n";
}
} continue {
$foilindex++;
}
} continue {
$conceptindex++;
}
$table .= "</table>\n";
#
# Build option index with color stuff
return ($table,\@Foils,\@Concepts);
}
sub build_option_index {
my ($ORdata)= @_;
my $table = "<table>\n";
my $optionindex = 0;
my @Rows;
foreach my $option (&mt('correct option chosen'),@{$ORdata->{'_Options'}}) {
push (@Rows,
'<tr>'.
'<td bgcolor="'.$plotcolors->[$optionindex++].'">'.
(' 'x4).'</td>'.
'<td>'.&HTML::Entities::encode($option).'</td>'.
"</tr>\n");
}
shift(@Rows); # Throw away 'correct option chosen' color
$table .= join('',reverse(@Rows));
$table .= "</table>\n";
}
#########################################################
#########################################################
##
## Generic Interface Routines
##
#########################################################
#########################################################
sub CreateInterface {
##
## Environment variable initialization
if (! exists$ENV{'form.AnalyzeOver'}) {
$ENV{'form.AnalyzeOver'} = 'Tries';
}
##
## Build the menu
my $Str = '';
$Str .= &Apache::lonhtmlcommon::breadcrumbs
(undef,'Detailed Problem Analysis');
$Str .= '<table cellspacing="5">'."\n";
$Str .= '<tr>';
$Str .= '<td align="center"><b>'.&mt('Sections').'</b></td>';
$Str .= '<td align="center"><b>'.&mt('Enrollment Status').'</b></td>';
# $Str .= '<td align="center"><b>'.&mt('Sequences and Folders').'</b></td>';
$Str .= '<td align="center"> </td>';
$Str .= '</tr>'."\n";
##
##
$Str .= '<tr><td align="center">'."\n";
$Str .= &Apache::lonstatistics::SectionSelect('Section','multiple',5);
$Str .= '</td>';
#
$Str .= '<td align="center">';
$Str .= &Apache::lonhtmlcommon::StatusOptions(undef,undef,5);
$Str .= '</td>';
#
# $Str .= '<td align="center">';
my $only_seq_with_assessments = sub {
my $s=shift;
if ($s->{'num_assess'} < 1) {
return 0;
} else {
return 1;
}
};
&Apache::lonstatistics::MapSelect('Maps','multiple,all',5,
$only_seq_with_assessments);
##
##
$Str .= '<td>';
{ # These braces are here to organize the code, not scope it.
{
$Str .= '<nobr>'.&mt('Analyze Over ');
$Str .= &Apache::loncommon::help_open_topic
('Analysis_Analyze_Over');
$Str .='<select name="AnalyzeOver" >';
$Str .= '<option value="Tries" ';
if (! exists($ENV{'form.AnalyzeOver'}) ||
$ENV{'form.AnalyzeOver'} eq 'Tries'){
# Default to Tries
$Str .= ' selected ';
}
$Str .= '>'.&mt('Tries').'</option>';
$Str .= '<option value="Time" ';
$Str .= ' selected ' if ($ENV{'form.AnalyzeOver'} eq 'Time');
$Str .= '>'.&mt('Time').'</option>';
$Str .= '</select>';
$Str .= '</nobr><br />';
}
{
$Str .= '<nobr>'.&mt('Analyze as ');
$Str .= &Apache::loncommon::help_open_topic
('Analysis_Analyze_as');
$Str .='<select name="AnalyzeAs" >';
$Str .= '<option value="Concepts" ';
if (! exists($ENV{'form.AnalyzeAs'}) ||
$ENV{'form.AnalyzeAs'} eq 'Concepts'){
# Default to Concepts
$Str .= ' selected ';
}
$Str .= '>'.&mt('Concepts').'</option>';
$Str .= '<option value="Foils" ';
$Str .= ' selected ' if ($ENV{'form.AnalyzeAs'} eq 'Foils');
$Str .= '>'.&mt('Foils').'</option>';
$Str .= '</select></nobr><br />';
}
{
$Str .= '<br /><nobr>'.&mt('Number of Plots:');
$Str .= &Apache::loncommon::help_open_topic
('Analysis_num_plots');
$Str .= '<select name="NumPlots">';
if (! exists($ENV{'form.NumPlots'})
|| $ENV{'form.NumPlots'} < 1
|| $ENV{'form.NumPlots'} > 20) {
$ENV{'form.NumPlots'} = 5;
}
foreach my $i (1,2,3,4,5,6,7,8,10,15,20) {
$Str .= '<option value="'.$i.'" ';
if ($ENV{'form.NumPlots'} == $i) { $Str.=' selected '; }
$Str .= '>'.$i.'</option>';
}
$Str .= '</select></nobr>';
}
}
$Str .= '</td>';
##
##
$Str .= '</tr>'."\n";
$Str .= '</table>'."\n";
return $Str;
}
#########################################################
#########################################################
##
## Misc Option Response functions
##
#########################################################
#########################################################
sub get_time_from_row {
my ($row) = @_;
if (ref($row)) {
return $row->[&Apache::loncoursedata::RD_timestamp()];
}
return undef;
}
sub get_tries_from_row {
my ($row) = @_;
if (ref($row)) {
return $row->[&Apache::loncoursedata::RD_tries()];
}
return undef;
}
sub hashify_attempt {
my ($row) = @_;
my %attempt;
$attempt{'tries'} = $row->[&Apache::loncoursedata::RD_tries()];
$attempt{'submission'} = $row->[&Apache::loncoursedata::RD_submission()];
$attempt{'award'} = $row->[&Apache::loncoursedata::RD_awarddetail()];
$attempt{'timestamp'} = $row->[&Apache::loncoursedata::RD_timestamp()];
return %attempt;
}
sub Process_OR_Row {
my ($row) = @_;
my %RowData;
my $student_id = $row->[&Apache::loncoursedata::RD_student_id()];
my $award = $row->[&Apache::loncoursedata::RD_awarddetail()];
my $grading = $row->[&Apache::loncoursedata::RD_response_eval()];
my $submission = $row->[&Apache::loncoursedata::RD_submission()];
my $time = $row->[&Apache::loncoursedata::RD_timestamp()];
my $tries = $row->[&Apache::loncoursedata::RD_tries()];
return undef if ($award eq 'MISSING_ANSWER');
if ($award =~ /(APPROX_ANS|EXACT_ANS)/) {
$RowData{'_correct'} = 1;
}
$RowData{'_total'} = 1;
my @Foilgrades = split('&',$grading);
my @Foilsubs = split('&',$submission);
for (my $j=0;$j<=$#Foilgrades;$j++) {
my ($foilid,$correct) = split('=',$Foilgrades[$j]);
$foilid = &Apache::lonnet::unescape($foilid);
my (undef,$submission) = split('=',$Foilsubs[$j]);
if ($correct) {
$RowData{$foilid}->{'_correct'}++;
} else {
$submission = &Apache::lonnet::unescape($submission);
$RowData{$foilid}->{$submission}++;
}
$RowData{$foilid}->{'_total'}++;
}
return %RowData;
}
1;
__END__
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