version 1.34, 2002/10/30 18:37:00
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version 1.62, 2003/12/08 19:37:44
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# The LearningOnline Network with CAPA |
# The LearningOnline Network with CAPA |
# (Publication Handler |
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# |
# |
# $Id$ |
# $Id$ |
# |
# |
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# http://www.lon-capa.org/ |
# http://www.lon-capa.org/ |
# |
# |
# (Navigate problems for statistical reports |
# (Navigate problems for statistical reports |
# YEAR=2001 |
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# 5/5,7/9,7/25/1,8/11,9/13,9/26,10/5,10/9,10/22,10/26 Behrouz Minaei |
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# 11/1,11/4,11/16,12/14,12/16,12/18,12/20,12/31 Behrouz Minaei |
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# YEAR=2002 |
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# 1/22,2/1,2/6,2/25,3/2,3/6,3/17,3/21,3/22,3/26,4/7,5/6 Behrouz Minaei |
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# 5/12,5/14,5/15,5/19,5/26,7/16,7/25,7/29,8/5 Behrouz Minaei |
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# |
# |
### |
############################################### |
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############################################### |
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package Apache::lonproblemstatistics; |
=pod |
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use strict; |
=head1 NAME |
use Apache::lonnet(); |
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use Apache::lonhtmlcommon; |
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use Apache::loncoursedata; |
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use GDBM_File; |
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my $jr; |
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sub InitializeProblemStatistics { |
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my ($cacheDB, $students, $courseID, $c, $r)=@_; |
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my %cache; |
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$jr = $r; |
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unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) { |
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$r->print('Unable to tie database1.'); |
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return ('ERROR', undef); |
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} |
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# Remove students who don't have the proper section. |
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my @sectionsSelected = split(':',$cache{'sectionsSelected'}); |
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for(my $studentIndex=((scalar @$students)-1); $studentIndex>=0; |
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$studentIndex--) { |
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my $value = $cache{$students->[$studentIndex].':section'}; |
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my $found = 0; |
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foreach (@sectionsSelected) { |
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if($_ eq 'none') { |
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if($value eq '' || !defined($value) || $value eq ' ') { |
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$found = 1; |
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last; |
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} |
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} else { |
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if($value eq $_) { |
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$found = 1; |
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last; |
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} |
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} |
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} |
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if($found == 0) { |
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splice(@$students, $studentIndex, 1); |
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} |
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} |
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my $isNotCached = 0; |
lonproblemstatistics |
my $lastStatus = (defined($cache{'StatisticsLastStatus'})) ? |
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$cache{'StatisticsLastStatus'} : 'Nothing'; |
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my $whichStudents = join(':::',sort(@$students)); |
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if(!defined($cache{'StatisticsCached'}) || |
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$lastStatus ne $cache{'Status'} || |
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$whichStudents ne $cache{'StatisticsWhichStudents'}) { |
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$isNotCached = 1; |
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} |
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untie(%cache); |
=head1 SYNOPSIS |
unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_WRCREAT(),0640)) { |
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$r->print('Unable to tie database.2'); |
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return ('ERROR', undef); |
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} |
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if($isNotCached && defined($cache{'StatisticsCached'})) { |
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my @statkeys = split(':::', $cache{'StatisticsKeys'}); |
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delete $cache{'StatisticsKeys'}; |
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delete $cache{'StatisticsCached'}; |
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foreach(@statkeys) { |
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delete $cache{$_}; |
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} |
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} |
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untie(%cache); |
Routines to present problem statistics to instructors via tables, |
if($isNotCached) { |
Excel files, and plots. |
&Apache::loncoursedata::DownloadStudentCourseDataSeparate($students, |
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'true', |
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$cacheDB, |
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'true', |
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'true', |
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$courseID, |
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$r, $c); |
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} |
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if($c->aborted()) { return ('ERROR', undef); } |
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unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) { |
=over 4 |
$r->print('Unable to tie database.3'); |
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return ('ERROR', undef); |
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} |
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my $problemData; |
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if($isNotCached) { |
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($problemData) = &ExtractStudentData(\%cache, $students); |
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&CalculateStatistics($problemData, \%cache, $courseID); |
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} |
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untie(%cache); |
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unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_WRCREAT(),0640)) { |
=cut |
$r->print('Unable to tie database.4'); |
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return ('ERROR', undef); |
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} |
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if($isNotCached) { |
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foreach(keys(%$problemData)) { |
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$cache{$_} = $problemData->{$_}; |
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} |
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$cache{'StatisticsKeys'} = join(':::', keys(%$problemData)); |
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$cache{'StatisticsCached'} = 'true'; |
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$cache{'StatisticsLastStatus'} = $cache{'Status'}; |
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$cache{'StatisticsWhichStudents'} = $whichStudents; |
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} |
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untie(%cache); |
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unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) { |
############################################### |
$r->print('Unable to tie database.5'); |
############################################### |
return ('ERROR', undef); |
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} |
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my $orderedProblems = &SortProblems(\%cache, |
package Apache::lonproblemstatistics; |
$cache{'ProblemStatisticsSort'}, |
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$cache{'SortProblems'}, |
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$cache{'ProblemStatisticsAscend'}); |
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untie(%cache); |
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return ('OK', $orderedProblems); |
use strict; |
} |
use Apache::lonnet(); |
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use Apache::loncommon(); |
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use Apache::lonhtmlcommon; |
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use Apache::loncoursedata; |
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use Apache::lonstatistics; |
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use Apache::lonlocal; |
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use Spreadsheet::WriteExcel; |
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## |
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## Localization notes: |
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## |
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## in @Fields[0]->{'long_title'} is placed in Excel files and is used as the |
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## header for plots created with Graph.pm, both of which more than likely do |
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## not support localization. |
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## |
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my @Fields = ( |
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{ name => 'problem_num', |
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title => 'P#', |
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align => 'right', |
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color => '#FFFFE6' }, |
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{ name => 'container', |
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title => 'Sequence or Folder', |
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align => 'left', |
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color => '#FFFFE6', |
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sortable => 'yes' }, |
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{ name => 'title', |
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title => 'Title', |
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align => 'left', |
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color => '#FFFFE6', |
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special => 'link', |
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sortable => 'yes', }, |
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{ name => 'part', |
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title => 'Part', |
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align => 'left', |
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color => '#FFFFE6', |
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}, |
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{ name => 'num_students', |
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title => '#Stdnts', |
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align => 'right', |
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color => '#EEFFCC', |
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format => '%d', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Number of Students Attempting Problem' }, |
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{ name => 'tries', |
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title => 'Tries', |
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align => 'right', |
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color => '#EEFFCC', |
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format => '%d', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Total Number of Tries' }, |
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{ name => 'max_tries', |
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title => 'Max Tries', |
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align => 'right', |
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color => '#DDFFFF', |
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format => '%d', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Maximum Number of Tries' }, |
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{ name => 'mean_tries', |
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title => 'Mean Tries', |
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align => 'right', |
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color => '#DDFFFF', |
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format => '%5.2f', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Average Number of Tries' }, |
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{ name => 'std_tries', |
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title => 'S.D. tries', |
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align => 'right', |
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color => '#DDFFFF', |
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format => '%5.2f', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Standard Deviation of Number of Tries' }, |
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{ name => 'skew_tries', |
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title => 'Skew Tries', |
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align => 'right', |
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color => '#DDFFFF', |
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format => '%5.2f', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Skew of Number of Tries' }, |
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{ name => 'deg_of_diff', |
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title => 'DoDiff', |
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align => 'right', |
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color => '#DDFFFF', |
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format => '%5.2f', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Degree of Difficulty'. |
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'[ 1 - ((#YES+#yes) / Tries) ]'}, |
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{ name => 'num_solved', |
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title => '#YES', |
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align => 'right', |
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color => '#FFDDDD', |
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format => '%d', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Number of Students able to Solve' }, |
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{ name => 'num_override', |
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title => '#yes', |
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align => 'right', |
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color => '#FFDDDD', |
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format => '%d', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Number of Students given Override' }, |
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{ name => 'per_wrong', |
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title => '%Wrng', |
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align => 'right', |
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color => '#FFFFE6', |
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format => '%4.1f', |
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sortable => 'yes', |
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graphable => 'yes', |
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long_title => 'Percent of students whose final answer is wrong' }, |
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); |
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############################################### |
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############################################### |
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=pod |
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=item &CreateInterface() |
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Create the main intereface for the statistics page. Allows the user to |
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select sections, maps, and output. |
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=cut |
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############################################### |
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############################################### |
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my @OutputOptions = |
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( |
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{ name => 'problem statistics grouped by sequence', |
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value => 'HTML problem statistics grouped', |
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description => 'Output statistics for the problem parts.', |
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mode => 'html', |
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show => 'grouped', |
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}, |
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{ name => 'problem statistics ungrouped', |
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value => 'HTML problem statistics ungrouped', |
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description => 'Output statistics for the problem parts.', |
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mode => 'html', |
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show => 'ungrouped', |
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}, |
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{ name => 'problem statistics, Excel', |
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value => 'Excel problem statistics', |
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description => 'Output statistics for the problem parts '. |
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'in an Excel workbook', |
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mode => 'excel', |
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show => 'all', |
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}, |
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); |
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sub CreateInterface { |
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my $Str = ''; |
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$Str .= '<table cellspacing="5">'."\n"; |
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$Str .= '<tr>'; |
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$Str .= '<td align="center"><b>'.&mt('Sections').'</b></td>'; |
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$Str .= '<td align="center"><b>'.&mt('Enrollment Status').'</b></td>'; |
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$Str .= '<td align="center"><b>'.&mt('Sequences and Folders').'</b></td>'; |
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$Str .= '<td align="center"><b>'.&mt('Output').'</b></td>'; |
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$Str .= '</tr>'."\n"; |
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# |
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$Str .= '<tr><td align="center">'."\n"; |
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$Str .= &Apache::lonstatistics::SectionSelect('Section','multiple',5); |
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$Str .= '</td><td align="center">'; |
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$Str .= &Apache::lonhtmlcommon::StatusOptions(undef,undef,5); |
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$Str .= '</td><td align="center">'; |
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# |
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my $only_seq_with_assessments = sub { |
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my $s=shift; |
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if ($s->{'num_assess'} < 1) { |
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return 0; |
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} else { |
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return 1; |
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} |
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}; |
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$Str .= &Apache::lonstatistics::MapSelect('Maps','multiple,all',5, |
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$only_seq_with_assessments); |
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$Str .= '</td><td>'."\n"; |
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my ($html,$outputmode,$show) = |
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&Apache::lonstatistics::CreateAndParseOutputSelector( |
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'statsoutputmode', |
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'HTML problem statistics grouped', |
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@OutputOptions); |
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$Str .= $html; |
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$Str .= '</td></tr>'."\n"; |
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$Str .= '</table>'."\n"; |
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$Str .= '<input type="submit" name="GenerateStatistics" value="'. |
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&mt('Generate Statistics').'" />'; |
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$Str .= ' 'x5; |
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$Str .= '<input type="submit" name="ClearCache" value="'. |
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&mt('Clear Caches').'" />'; |
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$Str .= ' 'x5; |
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return ($Str,$outputmode,$show); |
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} |
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############################################### |
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############################################### |
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=pod |
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sub BuildProblemStatisticsPage { |
=item &BuildProblemStatisticsPage() |
my ($cacheDB, $students, $courseID, $c, $r)=@_; |
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my @Header = ("Homework Sets Order","#Stdnts","Tries","Mod", |
Main interface to problem statistics. |
"Mean","#YES","#yes","%Wrng","DoDiff", |
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"S.D.","Skew.","D.F.1st","D.F.2nd"); |
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my $color=&setbgcolor(0); |
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my %cache; |
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unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) { |
=cut |
$r->print('Unable to tie database.6'); |
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return; |
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} |
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my $Ptr = ''; |
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$Ptr .= '<table border="0" cellspacing="5"><tbody>'; |
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$Ptr .= '<tr><td align="right"><b>Select Map</b></td>'."\n"; |
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$Ptr .= '<td align="left">'; |
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$Ptr .= &Apache::lonhtmlcommon::MapOptions(\%cache, 'Statistics', |
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'Statistics'); |
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$Ptr .= '</td></tr>'."\n"; |
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$Ptr .= '<tr><td align="right"><b>Sorting Type:</b></td>'."\n"; |
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$Ptr .= '<td align="left">'."\n"; |
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$Ptr .= &Apache::lonhtmlcommon::AscendOrderOptions( |
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$cache{'ProblemStatisticsAscend'}, |
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'ProblemStatistics', |
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'Statistics'); |
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$Ptr .= '</td></tr>'."\n"; |
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$Ptr .= '<tr><td align="right"><b>Select Sections</b>'; |
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$Ptr .= '</td>'."\n"; |
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$Ptr .= '<td align="left">'."\n"; |
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my @sections = split(':',$cache{'sectionList'}); |
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my @sectionsSelected = split(':',$cache{'sectionsSelected'}); |
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$Ptr .= &Apache::lonhtmlcommon::MultipleSectionSelect(\@sections, |
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\@sectionsSelected, |
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'Statistics'); |
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$Ptr .= '</td></tr>'."\n"; |
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$Ptr .= &ProblemStatisticsButtons($cache{'DisplayFormat'}, |
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$cache{'DisplayLegend'}, |
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$cache{'SortProblems'}); |
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$Ptr .= '</table>'; |
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if($cache{'DisplayLegend'} eq 'Show Legend') { |
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$Ptr .= &ProblemStatisticsLegend(); |
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} |
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$r->print($Ptr); |
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$r->rflush(); |
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untie(%cache); |
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my ($result, $orderedProblems) = |
############################################### |
&InitializeProblemStatistics($cacheDB, $students, $courseID, $c, $r); |
############################################### |
if($result ne 'OK') { |
sub BuildProblemStatisticsPage { |
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my ($r,$c)=@_; |
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# |
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my %Saveable_Parameters = ('Status' => 'scalar', |
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'statsoutputmode' => 'scalar', |
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'Section' => 'array', |
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'StudentData' => 'array', |
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'Maps' => 'array'); |
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&Apache::loncommon::store_course_settings('statistics', |
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\%Saveable_Parameters); |
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&Apache::loncommon::restore_course_settings('statistics', |
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\%Saveable_Parameters); |
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# |
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&Apache::lonstatistics::PrepareClasslist(); |
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# |
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my ($interface,$output_mode,$show) = &CreateInterface(); |
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$r->print($interface); |
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$r->print('<input type="hidden" name="statsfirstcall" value="no" />'); |
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$r->print('<input type="hidden" name="sortby" value="'.$ENV{'form.sortby'}. |
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'" />'); |
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$r->print('<input type="hidden" name="plot" value="" />'); |
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if (! exists($ENV{'form.statsfirstcall'})) { |
return; |
return; |
} |
} |
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# |
unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) { |
&Apache::lonstatistics::Gather_Student_Data($r); |
$r->print('Unable to tie database.6'); |
# |
return; |
# |
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if ($output_mode eq 'html') { |
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$r->print("<h2>". |
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$ENV{'course.'.$ENV{'request.course.id'}.'.description'}. |
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"</h2>\n"); |
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$r->print("<h3>".localtime(time)."</h3>"); |
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$r->rflush(); |
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if ($show eq 'grouped') { |
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&output_html_grouped_by_sequence($r); |
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} elsif ($show eq 'ungrouped') { |
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&output_html_ungrouped($r); |
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} |
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} elsif ($output_mode eq 'excel') { |
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$r->print('<h2>'.&mt('Preparing Excel Spreadsheet').'</h2>'); |
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&output_excel($r); |
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} else { |
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$r->print('<h1>'.&mt('Not implemented').'</h1>'); |
} |
} |
&BuildStatisticsTable(\%cache, $cache{'DisplayFormat'}, |
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$cache{'SortProblems'}, $orderedProblems, |
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\@Header, $r, $color); |
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untie(%cache); |
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|
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return; |
return; |
} |
} |
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sub BuildGraphicChart { |
############################################### |
my ($graph,$cacheDB,$courseDescription,$students,$courseID,$r,$c)=@_; |
############################################### |
my %cache; |
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my $max = 0; |
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unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) { |
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return 'Unable to tie database.7'; |
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} |
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# my @problems = split(':::', $cache{'problemList'}); |
=pod |
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my $title = ''; |
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if($graph eq 'DoDiffGraph') { |
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$title = 'Degree-of-Difficulty'; |
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} else { |
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$title = 'Wrong-Percentage'; |
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} |
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=item &output_html_grouped_by_sequence() |
|
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# foreach (@problems) { |
Presents the statistics data as an html table organized by the order |
# my $data = 0; |
the assessments appear in the course. |
# if($graph eq 'DoDiffGraph') { |
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# $data = sprintf("%.2f", $cache{$_.':degreeOfDifficulty'}), |
=cut |
# } else { |
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# $data = sprintf("%.1f", $cache{$_.':percentWrong'}), |
############################################### |
# } |
############################################### |
# if($max < $data) { |
sub output_html_grouped_by_sequence { |
# $max = $data; |
my ($r) = @_; |
# } |
my $problem_num = 0; |
# push(@values, $data); |
#$r->print(&ProblemStatisticsLegend()); |
# } |
foreach my $sequence (&Apache::lonstatistics::Sequences_with_Assess()) { |
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next if ($sequence->{'num_assess'}<1); |
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$r->print("<h3>".$sequence->{'title'}."</h3>"); |
my $count = 1; |
$r->print('<table border="0"><tr><td bgcolor="#777777">'."\n"); |
my $currentSequence = -1; |
$r->print('<table border="0" cellpadding="3">'."\n"); |
my $sortProblems = 'Sort Within Sequence'; |
$r->print('<tr bgcolor="#FFFFE6">'); |
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my $Str = &statistics_table_header('no container no plots'); |
my ($result, $orderedProblems) = |
$r->print('<tr bgcolor="#FFFFE6">'.$Str."</tr>\n"); |
&InitializeProblemStatistics($cacheDB, $students, $courseID, $c, $r); |
foreach my $resource (@{$sequence->{'contents'}}) { |
if($result ne 'OK') { |
next if ($resource->{'type'} ne 'assessment'); |
return; |
foreach my $part (@{$resource->{'parts'}}) { |
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$problem_num++; |
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my $data = &get_statistics($sequence,$resource,$part, |
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$problem_num); |
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my $option = ''; |
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$r->print('<tr>'.&statistics_html_table_data($data, |
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'no container'). |
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"</tr>\n"); |
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} |
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} |
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$r->print("</table>\n"); |
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$r->print("</td></tr></table>\n"); |
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$r->rflush(); |
} |
} |
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# |
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return; |
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} |
|
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my @values = (); |
############################################### |
|
############################################### |
|
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foreach(@$orderedProblems) { |
=pod |
my ($sequence,$problem,$part)=split(':', $_); |
|
if($cache{'StatisticsMaps'} ne 'All Maps' && |
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$cache{'StatisticsMaps'} ne $cache{$sequence.':title'}) { |
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next; |
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} |
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|
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if($currentSequence == -1 || |
=item &output_html_ungrouped() |
($sortProblems eq 'Sort Within Sequence' && |
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$currentSequence != $sequence)) { |
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if($currentSequence ne -1) { |
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#$r->print('<br>finish a graph<br>'); |
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} |
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if($sortProblems eq 'Sort Within Sequence') { |
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$r->print('<b>'.$cache{$sequence.':title'}.'</b>'); |
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} |
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|
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my $sendValues = join(',', @values); |
Presents the statistics data in a single html table which can be sorted by |
my $sendCount = scalar(@values); |
different columns. |
|
|
my @GData = ($courseDescription, 'Problems', |
=cut |
$title, $max, $sendCount, $sendValues); |
|
$r->print('</form>'."\n"); |
############################################### |
$r->print('<IMG src="/cgi-bin/graph.gif?'. |
############################################### |
(join('&', @GData)).'" border="1" />'); |
sub output_html_ungrouped { |
$r->print('<form>'."\n"); |
my ($r,$option) = @_; |
$currentSequence = $sequence; |
# |
@values = (); |
if (exists($ENV{'form.plot'}) && $ENV{'form.plot'} ne '') { |
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&plot_statistics($r,$ENV{'form.plot'}); |
} |
} |
my $data = 0; |
# |
if($graph eq 'DoDiffGraph') { |
my $problem_num = 0; |
$data = sprintf("%.2f", $cache{$_.':degreeOfDifficulty'}), |
my $show_container = 0; |
|
my $show_part = 0; |
|
#$r->print(&ProblemStatisticsLegend()); |
|
my $sortby = undef; |
|
foreach my $field (@Fields) { |
|
if ($ENV{'form.sortby'} eq $field->{'name'}) { |
|
$sortby = $field->{'name'}; |
|
} |
|
} |
|
if (! defined($sortby) || $sortby eq '' || $sortby eq 'problem_num') { |
|
$sortby = 'container'; |
|
} |
|
# If there is more than one sequence, list their titles |
|
my @Sequences = &Apache::lonstatistics::Sequences_with_Assess(); |
|
if (@Sequences < 1) { |
|
$option .= ' no container'; |
|
} |
|
# |
|
# Compile the data |
|
my @Statsarray; |
|
foreach my $sequence (@Sequences) { |
|
next if ($sequence->{'num_assess'}<1); |
|
foreach my $resource (@{$sequence->{'contents'}}) { |
|
next if ($resource->{'type'} ne 'assessment'); |
|
foreach my $part (@{$resource->{'parts'}}) { |
|
$problem_num++; |
|
my $data = &get_statistics($sequence,$resource,$part, |
|
$problem_num); |
|
$show_part = 1 if ($part ne '0'); |
|
# |
|
push (@Statsarray,$data); |
|
} |
|
} |
|
} |
|
# |
|
# Sort the data |
|
my @OutputOrder; |
|
if ($sortby eq 'container') { |
|
@OutputOrder = @Statsarray; |
|
} else { |
|
# $sortby is already defined, so we can charge ahead |
|
if ($sortby =~ /^(title|part)$/i) { |
|
# Alpha comparison |
|
@OutputOrder = sort { |
|
lc($a->{$sortby}) cmp lc($b->{$sortby}) || |
|
lc($a->{'title'}) cmp lc($b->{'title'}) || |
|
lc($a->{'part'}) cmp lc($b->{'part'}); |
|
} @Statsarray; |
} else { |
} else { |
$data = sprintf("%.1f", $cache{$_.':percentWrong'}), |
# Numerical comparison |
|
@OutputOrder = sort { |
|
my $retvalue = 0; |
|
if ($b->{$sortby} eq 'nan') { |
|
if ($a->{$sortby} ne 'nan') { |
|
$retvalue = -1; |
|
} else { |
|
$retvalue = 0; |
|
} |
|
} |
|
if ($a->{$sortby} eq 'nan') { |
|
if ($b->{$sortby} ne 'nan') { |
|
$retvalue = 1; |
|
} |
|
} |
|
if ($retvalue eq '0') { |
|
$retvalue = $b->{$sortby} <=> $a->{$sortby} || |
|
lc($a->{'title'}) <=> lc($b->{'title'}) || |
|
lc($a->{'part'}) <=> lc($b->{'part'}); |
|
} |
|
$retvalue; |
|
} @Statsarray; |
} |
} |
if($max < $data) { |
} |
$max = $data; |
$option .= 'no part' if (! $show_part); |
|
my $num_output = 0; |
|
# |
|
# output the headers |
|
$r->print('<table border="0"><tr><td bgcolor="#777777">'."\n"); |
|
$r->print('<table border="0" cellpadding="3">'."\n"); |
|
my $Str = &statistics_table_header($option.' sortable'); |
|
$r->print('<tr bgcolor="#FFFFE6">'.$Str."</tr>\n"); |
|
# |
|
foreach my $rowdata (@OutputOrder) { |
|
$num_output++; |
|
if ($num_output % 25 == 0) { |
|
$r->print("</table>\n</td></tr></table>\n"); |
|
# |
|
$r->print('<table border="0"><tr><td bgcolor="#777777">'."\n"); |
|
$r->print('<table border="0" cellpadding="3">'."\n"); |
|
my $Str = &statistics_table_header($option.' sortable'); |
|
$r->print('<tr bgcolor="#FFFFE6">'.$Str."</tr>\n"); |
|
$r->rflush(); |
} |
} |
push(@values, $data); |
$r->print('<tr>'.&statistics_html_table_data($rowdata,$option). |
|
"</tr>\n"); |
} |
} |
|
$r->print("</table>\n"); |
#$r->print('<br>'); |
$r->print("</td></tr></table>\n"); |
|
$r->rflush(); |
untie(%cache); |
# |
|
|
return; |
return; |
} |
} |
|
|
|
############################################### |
|
############################################### |
|
|
#---- Problem Statistics Web Page --------------------------------------- |
=pod |
|
|
sub CreateProblemStatisticsTableHeading { |
=item &output_excel() |
my ($headings,$r)=@_; |
|
|
|
my $Str=''; |
Presents the statistical data in an Excel 95 compatable spreadsheet file. |
$Str .= '<tr>'."\n"; |
|
$Str .= '<th bgcolor="#ffffe6">P#</th>'."\n"; |
|
foreach(@$headings) { |
|
$Str .= '<th bgcolor="#ffffe6">'; |
|
$Str .= '<a href="/adm/statistics?reportSelected='; |
|
$Str .= &Apache::lonnet::escape('Problem Statistics'); |
|
$Str .= '&ProblemStatisticsSort='; |
|
$Str .= &Apache::lonnet::escape($_).'">'.$_.'</a> </th>'."\n"; |
|
} |
|
$Str .= "\n".'</tr>'."\n"; |
|
|
|
return $Str; |
|
} |
|
|
|
sub BuildStatisticsTable { |
=cut |
my ($cache,$displayFormat,$sortProblems,$orderedProblems,$headings, |
|
$r,$color)=@_; |
############################################### |
|
############################################### |
my $count = 1; |
sub output_excel { |
my $currentSequence = -1; |
my ($r) = @_; |
foreach(@$orderedProblems) { |
my $filename = '/prtspool/'. |
my ($sequence,$problem,$part)=split(':', $_); |
$ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'. |
if($cache->{'StatisticsMaps'} ne 'All Maps' && |
time.'_'.rand(1000000000).'.xls'; |
$cache->{'StatisticsMaps'} ne $cache->{$sequence.':title'}) { |
# |
next; |
my $excel_workbook = undef; |
} |
my $excel_sheet = undef; |
|
# |
if($currentSequence == -1 || |
my $rows_output = 0; |
($sortProblems eq 'Sort Within Sequence' && |
my $cols_output = 0; |
$currentSequence != $sequence)) { |
# |
if($displayFormat ne 'Display CSV Format') { |
# Create sheet |
if($currentSequence ne -1) { |
$excel_workbook = Spreadsheet::WriteExcel->new('/home/httpd'.$filename); |
$r->print('</table>'); |
# |
$r->print('</td></tr></table><br>'); |
# Check for errors |
} |
if (! defined($excel_workbook)) { |
if($sortProblems eq 'Sort Within Sequence') { |
$r->log_error("Error creating excel spreadsheet $filename: $!"); |
$r->print('<b>'.$cache->{$sequence.':title'}.'</b>'); |
$r->print(&mt("Problems creating new Excel file. ". |
|
"This error has been logged. ". |
|
"Please alert your LON-CAPA administrator.")); |
|
return ; |
|
} |
|
# |
|
# The excel spreadsheet stores temporary data in files, then put them |
|
# together. If needed we should be able to disable this (memory only). |
|
# The temporary directory must be specified before calling 'addworksheet'. |
|
# File::Temp is used to determine the temporary directory. |
|
$excel_workbook->set_tempdir($Apache::lonnet::tmpdir); |
|
# |
|
# Add a worksheet |
|
my $sheetname = $ENV{'course.'.$ENV{'request.course.id'}.'.description'}; |
|
if (length($sheetname) > 31) { |
|
$sheetname = substr($sheetname,0,31); |
|
} |
|
$excel_sheet = $excel_workbook->addworksheet( |
|
&Apache::loncommon::clean_excel_name($sheetname) |
|
); |
|
# |
|
# Put the course description in the header |
|
$excel_sheet->write($rows_output,$cols_output++, |
|
$ENV{'course.'.$ENV{'request.course.id'}.'.description'}); |
|
$cols_output += 3; |
|
# |
|
# Put a description of the sections listed |
|
my $sectionstring = ''; |
|
my @Sections = @Apache::lonstatistics::SelectedSections; |
|
if (scalar(@Sections) > 1) { |
|
if (scalar(@Sections) > 2) { |
|
my $last = pop(@Sections); |
|
$sectionstring = "Sections ".join(', ',@Sections).', and '.$last; |
|
} else { |
|
$sectionstring = "Sections ".join(' and ',@Sections); |
|
} |
|
} else { |
|
if ($Sections[0] eq 'all') { |
|
$sectionstring = "All sections"; |
|
} else { |
|
$sectionstring = "Section ".$Sections[0]; |
|
} |
|
} |
|
$excel_sheet->write($rows_output,$cols_output++,$sectionstring); |
|
$cols_output += scalar(@Sections); |
|
# |
|
# Put the date in there too |
|
$excel_sheet->write($rows_output,$cols_output++, |
|
'Compiled on '.localtime(time)); |
|
# |
|
$rows_output++; |
|
$cols_output=0; |
|
# |
|
# Long Headersheaders |
|
foreach my $field (@Fields) { |
|
next if ($field->{'name'} eq 'problem_num'); |
|
if (exists($field->{'long_title'})) { |
|
$excel_sheet->write($rows_output,$cols_output++, |
|
$field->{'long_title'}); |
|
} else { |
|
$excel_sheet->write($rows_output,$cols_output++,''); |
|
} |
|
} |
|
$rows_output++; |
|
$cols_output=0; |
|
# Brief headers |
|
foreach my $field (@Fields) { |
|
next if ($field->{'name'} eq 'problem_num'); |
|
# Use english for excel as I am not sure how well excel handles |
|
# other character sets.... |
|
$excel_sheet->write($rows_output,$cols_output++,$field->{'title'}); |
|
} |
|
$rows_output++; |
|
# |
|
# Write the data |
|
my $problem_num=0; |
|
foreach my $sequence (&Apache::lonstatistics::Sequences_with_Assess()) { |
|
next if ($sequence->{'num_assess'}<1); |
|
foreach my $resource (@{$sequence->{'contents'}}) { |
|
next if ($resource->{'type'} ne 'assessment'); |
|
foreach my $part (@{$resource->{'parts'}}) { |
|
$cols_output=0; |
|
$problem_num++; |
|
my $data = &get_statistics($sequence,$resource,$part, |
|
$problem_num); |
|
# |
|
if (!defined($part) || $part eq '') { |
|
$part = ' '; |
} |
} |
$r->print('<table border="0"><tr><td bgcolor="#777777">'."\n"); |
foreach my $field (@Fields) { |
$r->print('<table border="0" cellpadding="3">'."\n"); |
next if ($field->{'name'} eq 'problem_num'); |
$r->print(&CreateProblemStatisticsTableHeading($headings, $r)); |
$excel_sheet->write($rows_output,$cols_output++, |
} else { |
$data->{$field->{'name'}}); |
if($sortProblems eq 'Sort Within Sequence') { |
|
$r->print('"'.$cache->{$sequence.':title'}.'"'); |
|
} |
} |
$r->print('<br>'); |
$rows_output++; |
} |
} |
$currentSequence = $sequence; |
|
} |
} |
|
|
my $ref = '<a href="'.$cache->{$problem.':source'}. |
|
'" target="_blank">'.$cache->{$problem.':title'}.'</a>'; |
|
my $title = $cache->{$problem.':title'}; |
|
if($part != 0) { |
|
$title .= ' Part '.$part; |
|
} |
|
my $source = $cache->{$problem.':source'}; |
|
my $tableData = join('&', $ref, $title, $source, |
|
$cache->{$_.':studentCount'}, |
|
$cache->{$_.':totalTries'}, |
|
$cache->{$_.':maxTries'}, |
|
$cache->{$_.':mean'}, |
|
$cache->{$_.':correct'}, |
|
$cache->{$_.':correctByOverride'}, |
|
$cache->{$_.':percentWrong'}, |
|
$cache->{$_.':degreeOfDifficulty'}, |
|
$cache->{$_.':standardDeviation'}, |
|
$cache->{$_.':skewness'}, |
|
$cache->{$_.':discriminationFactor1'}, |
|
$cache->{$_.':discriminationFactor2'}); |
|
|
|
&TableRow($displayFormat,$tableData,$count,$r,$color); |
|
|
|
$count++; |
|
} |
|
if($displayFormat ne 'Display CSV Format') { |
|
$r->print('</table>'."\n"); |
|
$r->print('</td></tr></table>'); |
|
} else { |
|
$r->print('<br>'); |
|
} |
} |
|
# |
|
# Write the excel file |
|
$excel_workbook->close(); |
|
# Tell the user where to get their excel file |
|
$r->print('<br />'. |
|
'<a href="'.$filename.'">'. |
|
&mt('Your Excel Spreadsheet').'</a>'."\n"); |
|
$r->rflush(); |
return; |
return; |
} |
} |
|
|
sub TableRow { |
############################################### |
my ($displayFormat,$Str,$RealIdx,$r,$color)=@_; |
############################################### |
my($ref,$title,$source,$StdNo,$TotalTries,$MxTries,$Avg,$YES,$Override, |
|
$Wrng,$DoD,$SD,$Sk,$_D1,$_D2)=split(/\&/,$Str); |
|
my $Ptr; |
|
if($displayFormat eq 'Display CSV Format') { |
|
$Ptr='"'.$RealIdx.'",'."\n". |
|
'"'.$title.'",'."\n". |
|
'"'.$source.'",'."\n". |
|
'"'.$StdNo.'",'."\n". |
|
'"'.$TotalTries.'",'."\n". |
|
'"'.$MxTries.'",'."\n". |
|
'"'.$Avg.'",'."\n". |
|
'"'.$YES.'",'."\n". |
|
'"'.$Override.'",'."\n". |
|
'"'.$Wrng.'",'."\n". |
|
'"'.$DoD.'",'."\n". |
|
'"'.$SD.'",'."\n". |
|
'"'.$Sk.'",'."\n". |
|
'"'.$_D1.'",'."\n". |
|
'"'.$_D2.'"'."\n". |
|
"<br>\n"; |
|
|
|
$r->print("\n".$Ptr); |
=pod |
} else { |
|
$Ptr='<tr>'."\n". |
|
'<td bgcolor="#ffffe6">'.$RealIdx.'</td>'."\n". |
|
'<td bgcolor="#ffffe6">'.$ref.'</td>'."\n". |
|
'<td bgcolor='.$color->{"yellow"}.'> '.$StdNo.'</td>'."\n". |
|
'<td bgcolor='.$color->{"yellow"}.'>'.$TotalTries.'</td>'."\n". |
|
'<td bgcolor='.$color->{"yellow"}.'>'.$MxTries.'</td>'."\n". |
|
'<td bgcolor='.$color->{"gb"}.'>'.$Avg.'</td>'."\n". |
|
'<td bgcolor='.$color->{"gb"}.'> '.$YES.'</td>'."\n". |
|
'<td bgcolor='.$color->{"gb"}.'> '.$Override.'</td>'."\n". |
|
'<td bgcolor='.$color->{"red"}.'> '.$Wrng.'</td>'."\n". |
|
'<td bgcolor='.$color->{"red"}.'> '.$DoD.'</td>'."\n". |
|
'<td bgcolor='.$color->{"green"}.'> '.$SD.'</td>'."\n". |
|
'<td bgcolor='.$color->{"green"}.'> '.$Sk.'</td>'."\n". |
|
'<td bgcolor='.$color->{"purple"}.'> '.$_D1.'</td>'."\n". |
|
'<td bgcolor='.$color->{"purple"}.'> '.$_D2.'</td>'."\n"; |
|
$r->print($Ptr.'</tr>'."\n"); |
|
} |
|
|
|
return; |
=item &statistics_html_table_data() |
} |
|
|
|
# For loading the colored table for display or un-colored for print |
Help function used to format the rows for HTML table output. |
sub setbgcolor { |
|
my $PrintTable=shift; |
|
my %color; |
|
if ($PrintTable){ |
|
$color{"gb"}="#FFFFFF"; |
|
$color{"red"}="#FFFFFF"; |
|
$color{"yellow"}="#FFFFFF"; |
|
$color{"green"}="#FFFFFF"; |
|
$color{"purple"}="#FFFFFF"; |
|
} else { |
|
$color{"gb"}="#DDFFFF"; |
|
$color{"red"}="#FFDDDD"; |
|
$color{"yellow"}="#EEFFCC"; |
|
$color{"green"}="#DDFFDD"; |
|
$color{"purple"}="#FFDDFF"; |
|
} |
|
|
|
return \%color; |
=cut |
|
|
|
############################################### |
|
############################################### |
|
sub statistics_html_table_data { |
|
my ($data,$options) = @_; |
|
my $row = ''; |
|
foreach my $field (@Fields) { |
|
next if ($options =~ /no $field->{'name'}/); |
|
$row .= '<td bgcolor="'.$field->{'color'}.'"'; |
|
if (exists($field->{'align'})) { |
|
$row .= ' align="'.$field->{'align'}.'"'; |
|
} |
|
$row .= '>'; |
|
if (exists($field->{'special'}) && $field->{'special'} eq 'link') { |
|
$row .= '<a href="'.$data->{$field->{'name'}.'.link'}.'">'; |
|
} |
|
if (exists($field->{'format'})) { |
|
$row .= sprintf($field->{'format'},$data->{$field->{'name'}}); |
|
} else { |
|
$row .= $data->{$field->{'name'}}; |
|
} |
|
if (exists($field->{'special'}) && $field->{'special'} eq 'link') { |
|
$row.= '</a>'; |
|
} |
|
$row .= '</td>'; |
|
} |
|
return $row; |
} |
} |
|
|
sub ProblemStatisticsButtons { |
sub statistics_table_header { |
my ($displayFormat, $displayLegend, $sortProblems)=@_; |
my ($options) = @_; |
|
my $header_row; |
my $Ptr = '<tr><td></td><td align="left">'; |
foreach my $field (@Fields) { |
$Ptr .= '<input type="submit" name="DoDiffGraph" '; |
next if ($options =~ /no $field->{'name'}/); |
$Ptr .= 'value="Plot Degree of Difficulty" />'."\n"; |
$header_row .= '<th>'; |
$Ptr .= '</td><td align="left">'; |
if ($options =~ /sortable/ && |
$Ptr .= '<input type="submit" name="PercentWrongGraph" '; |
exists($field->{'sortable'}) && $field->{'sortable'} eq 'yes') { |
$Ptr .= 'value="Plot Percent Wrong" />'."\n"; |
$header_row .= '<a href="javascript:'. |
$Ptr .= '</td></tr><tr><td></td><td>'."\n"; |
'document.Statistics.sortby.value='."'".$field->{'name'}."'". |
$Ptr .= '<input type="submit" name="SortProblems" '; |
';document.Statistics.submit();">'; |
if($sortProblems eq 'Sort All Problems') { |
} |
$Ptr .= 'value="Sort Within Sequence" />'."\n"; |
$header_row .= &mt($field->{'title'}); |
} else { |
if ($options =~ /sortable/) { |
$Ptr .= 'value="Sort All Problems" />'."\n"; |
$header_row.= '</a>'; |
} |
} |
$Ptr .= '</td><td align="left">'; |
if ($options !~ /no plots/ && |
$Ptr .= '<input type="submit" name="DisplayLegend" '; |
exists($field->{'graphable'}) && |
if($displayLegend eq 'Show Legend') { |
$field->{'graphable'} eq 'yes') { |
$Ptr .= 'value="Hide Legend" />'."\n"; |
$header_row.=' ('; |
} else { |
$header_row .= '<a href="javascript:'. |
$Ptr .= 'value="Show Legend" />'."\n"; |
"document.Statistics.plot.value='$field->{'name'}'". |
|
';document.Statistics.submit();">'; |
|
$header_row .= &mt('plot').'</a>)'; |
|
} |
|
$header_row .= '</th>'; |
|
} |
|
return $header_row; |
|
} |
|
|
|
############################################### |
|
############################################### |
|
|
|
=pod |
|
|
|
=item &plot_statistics() |
|
|
|
=cut |
|
|
|
############################################### |
|
############################################### |
|
sub plot_statistics { |
|
my ($r,$datafield) = @_; |
|
my @Data; |
|
# |
|
# |
|
my $sortfield = undef; |
|
my $title = undef; |
|
foreach my $field (@Fields) { |
|
if ($datafield eq $field->{'name'} && |
|
exists($field->{'graphable'}) && $field->{'graphable'} eq 'yes') { |
|
$sortfield = $field->{'name'}; |
|
$title = $field->{'long_title'}; |
|
} |
|
} |
|
return if (! defined($sortfield) || $sortfield eq ''); |
|
# |
|
my $Max = 0; |
|
my $problem_num = 0; |
|
foreach my $sequence (&Apache::lonstatistics::Sequences_with_Assess()) { |
|
next if ($sequence->{'num_assess'}<1); |
|
foreach my $resource (@{$sequence->{'contents'}}) { |
|
next if ($resource->{'type'} ne 'assessment'); |
|
foreach my $part (@{$resource->{'parts'}}) { |
|
my $problem_number++; |
|
my $data = &get_statistics($sequence,$resource,$part, |
|
$problem_num); |
|
my $value = $data->{$sortfield}; |
|
$Max = $value if ($Max < $value); |
|
push (@Data,$value); |
|
} |
|
} |
} |
} |
$Ptr .= '</td><td align="left">'; |
# |
$Ptr .= '<input type="submit" name="DisplayCSVFormat" '; |
# Print out plot request |
if($displayFormat eq 'Display CSV Format') { |
my $yaxis = ''; |
$Ptr .= 'value="Display Table Format" />'."\n"; |
if ($sortfield eq 'per_wrong') { |
} else { |
$yaxis = 'Percent'; |
$Ptr .= 'value="Display CSV Format" />'."\n"; |
} |
|
# |
|
# Determine appropriate value for $Max |
|
if ($sortfield eq 'deg_of_diff') { |
|
if ($Max > 0.5) { |
|
$Max = 1; |
|
} elsif ($Max > 0.2) { |
|
$Max = 0.5; |
|
} elsif ($Max > 0.1) { |
|
$Max = 0.2; |
|
} |
|
} elsif ($sortfield eq 'per_wrong') { |
|
if ($Max > 50) { |
|
$Max = 100; |
|
} elsif ($Max > 25) { |
|
$Max = 50; |
|
} elsif ($Max > 20) { |
|
$Max = 25; |
|
} elsif ($Max > 10) { |
|
$Max = 20; |
|
} elsif ($Max > 5) { |
|
$Max = 10; |
|
} else { |
|
$Max = 5; |
|
} |
} |
} |
$Ptr .= '</td></tr>'; |
|
|
$r->print("<p>".&Apache::loncommon::DrawBarGraph($title, |
return $Ptr; |
'Problem Number', |
|
$yaxis, |
|
$Max, |
|
undef, |
|
\@Data)."</p>\n"); |
|
# |
|
# Print out the data |
|
$ENV{'form.sortby'} = 'Contents'; |
|
# &output_html_ungrouped($r); |
|
return; |
} |
} |
|
|
|
sub get_statistics { |
|
my ($sequence,$resource,$part,$problem_num) = @_; |
|
# |
|
my $symb = $resource->{'symb'}; |
|
my $courseid = $ENV{'request.course.id'}; |
|
# |
|
my $students = \@Apache::lonstatistics::Students; |
|
if ($Apache::lonstatistics::SelectedSections[0] eq 'all') { |
|
$students = undef; |
|
} |
|
my $data = &Apache::loncoursedata::get_problem_statistics |
|
($students,$symb,$part,$courseid); |
|
$data->{'part'} = $part; |
|
$data->{'problem_num'} = $problem_num; |
|
$data->{'container'} = $sequence->{'title'}; |
|
$data->{'title'} = $resource->{'title'}; |
|
$data->{'title.link'} = $resource->{'src'}.'?symb='. |
|
&Apache::lonnet::escape($resource->{'symb'}); |
|
# |
|
return $data; |
|
} |
|
|
|
############################################### |
|
############################################### |
|
|
|
=pod |
|
|
|
=item &ProblemStatisticsLegend() |
|
|
|
HELP This needs to be localized, or at least generated automatically. |
|
|
|
=cut |
|
|
|
############################################### |
|
############################################### |
sub ProblemStatisticsLegend { |
sub ProblemStatisticsLegend { |
my $Ptr = ''; |
my $Ptr = ''; |
$Ptr = '<table border="0">'; |
$Ptr = '<table border="0">'; |
Line 519 sub ProblemStatisticsLegend {
|
Line 824 sub ProblemStatisticsLegend {
|
$Ptr .= '<b>Tries</b></td>'; |
$Ptr .= '<b>Tries</b></td>'; |
$Ptr .= '<td>Total number of tries for solving the problem.'; |
$Ptr .= '<td>Total number of tries for solving the problem.'; |
$Ptr .= '</td></tr><tr><td>'; |
$Ptr .= '</td></tr><tr><td>'; |
$Ptr .= '<b>Mod</b></td>'; |
$Ptr .= '<b>Max Tries</b></td>'; |
$Ptr .= '<td>Largest number of tries for solving the problem by a student.'; |
$Ptr .= '<td>Largest number of tries for solving the problem by a student.'; |
$Ptr .= '</td></tr><tr><td>'; |
$Ptr .= '</td></tr><tr><td>'; |
$Ptr .= '<b>Mean</b></td>'; |
$Ptr .= '<b>Mean</b></td>'; |
Line 561 sub ProblemStatisticsLegend {
|
Line 866 sub ProblemStatisticsLegend {
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$Ptr .= '<tr><td><b>Disc.</b></td>'; |
$Ptr .= '<tr><td><b>Disc.</b></td>'; |
$Ptr .= '<td>Number of Students had at least one discussion.'; |
$Ptr .= '<td>Number of Students had at least one discussion.'; |
$Ptr .= '</td></tr></table>'; |
$Ptr .= '</td></tr></table>'; |
|
|
return $Ptr; |
return $Ptr; |
} |
} |
|
|
sub ExtractStudentData { |
|
my ($cache, $students)=@_; |
|
|
|
my @problemList=(); |
|
my %problemData; |
|
foreach my $sequence (split(':', $cache->{'orderedSequences'})) { |
|
foreach my $problemID (split(':', $cache->{$sequence.':problems'})) { |
|
foreach my $part (split(/\:/,$cache->{$sequence.':'. |
|
$problemID. |
|
':parts'})) { |
|
my $id = $sequence.':'.$problemID.':'.$part; |
|
push(@problemList, $id); |
|
my $totalTries = 0; |
|
my $totalAwarded = 0; |
|
my $correct = 0; |
|
my $correctByOverride = 0; |
|
my $studentCount = 0; |
|
my $maxTries = 0; |
|
my $totalFirst = 0; |
|
my @studentTries=(); |
|
foreach(@$students) { |
|
my $code = $cache->{"$_:$problemID:$part:code"}; |
|
|
|
if(defined($cache->{$_.':error'}) || $code eq ' ' || |
|
$cache->{"$_:$problemID:NoVersion"} eq 'true') { |
|
next; |
|
} |
|
|
|
$studentCount++; |
|
my $tries = $cache->{"$_:$problemID:$part:tries"}; |
|
if($maxTries < $tries) { |
|
$maxTries = $tries; |
|
} |
|
$totalTries += $tries; |
|
push(@studentTries, $tries); |
|
|
|
my $awarded = $cache->{"$_:$problemID:$part:awarded"}; |
|
$totalAwarded += $awarded; |
|
|
|
if($code eq '*') { |
|
$correct++; |
|
if($tries == 1) { |
|
$totalFirst++; |
|
} |
|
} elsif($code eq '+') { |
|
$correctByOverride++; |
|
} |
|
} |
|
|
|
my $studentTriesJoined = join(':::', @studentTries); |
|
$problemData{$id.':sequenceTitle'} = |
|
$cache->{$sequence.':title'}; |
|
$problemData{$id.':studentCount'} = $studentCount; |
|
$problemData{$id.':totalTries'} = $totalTries; |
|
$problemData{$id.':studentTries'} = $studentTriesJoined; |
|
$problemData{$id.':totalAwarded'} = $totalAwarded; |
|
$problemData{$id.':correct'} = $correct; |
|
$problemData{$id.':correctByOverride'} = $correctByOverride; |
|
$problemData{$id.':wrong'} = $studentCount - |
|
($correct + $correctByOverride); |
|
$problemData{$id.':maxTries'} = $maxTries; |
|
$problemData{$id.':totalFirst'} = $totalFirst; |
|
} |
|
} |
|
} |
|
|
|
my @upperStudents1=(); |
|
my @lowerStudents1=(); |
|
my @upperStudents2=(); |
|
my @lowerStudents2=(); |
|
my $upperCount = int(0.27*scalar(@$students)); |
|
# Discriminant Factor criterion 1 |
|
my $sortedStudents = &SortDivideByTries($students,$cache,':totalAwarded'); |
|
|
|
for(my $i=0; $i<$upperCount; $i++) { |
|
push(@lowerStudents1, $sortedStudents->[$i]); |
|
push(@upperStudents1, $sortedStudents->[(scalar(@$students)-$i-1)]); |
|
} |
|
|
|
$problemData{'studentsUpperListCriterion1'}=join(':::', @upperStudents1); |
|
$problemData{'studentsLowerListCriterion1'}=join(':::', @lowerStudents1); |
|
|
|
# Discriminant Factor criterion 2 |
|
$sortedStudents = &SortDivideByTries($students, $cache, ':totalSolved'); |
|
|
|
for(my $i=0; $i<$upperCount; $i++) { |
|
push(@lowerStudents2, $sortedStudents->[$i]); |
|
push(@upperStudents2, $sortedStudents->[(scalar(@$students)-$i-1)]); |
|
} |
|
$problemData{'studentsUpperListCriterion2'}=join(':::', @upperStudents2); |
|
$problemData{'studentsLowerListCriterion2'}=join(':::', @lowerStudents2); |
|
|
|
$problemData{'problemList'} = join(':::', @problemList); |
|
|
|
return \%problemData; |
|
} |
|
|
|
sub SortDivideByTries { |
|
my ($toSort, $data, $sortOn)=@_; |
|
my @orderedData = sort { ($data->{$a.':totalTries'}) ? |
|
($data->{$a.$sortOn}/$data->{$a.':totalTries'}):0 |
|
<=> |
|
($data->{$b.':totalTries'}) ? |
|
($data->{$b.$sortOn}/$data->{$b.':totalTries'}):0 |
|
} @$toSort; |
|
|
|
return \@orderedData; |
|
} |
|
|
|
sub SortProblems { |
|
my ($problemData,$sortBy,$sortProblems,$ascend)=@_; |
|
|
|
my @problems = split(':::', $problemData->{'problemList'}); |
|
if($sortBy eq "Homework Sets Order") { |
|
return \@problems; |
|
} |
|
|
|
my $data; |
|
|
|
if ($sortBy eq "#Stdnts") { $data = ':studentCount'; } |
|
elsif($sortBy eq "Tries") { $data = ':totalTries'; } |
|
elsif($sortBy eq "Mod") { $data = ':maxTries'; } |
|
elsif($sortBy eq "Mean") { $data = ':mean'; } |
|
elsif($sortBy eq "#YES") { $data = ':correct'; } |
|
elsif($sortBy eq "#yes") { $data = ':correctByOverride'; } |
|
elsif($sortBy eq "%Wrng") { $data = ':percentWrong'; } |
|
elsif($sortBy eq "DoDiff") { $data = ':degreeOfDifficulty'; } |
|
elsif($sortBy eq "S.D.") { $data = ':standardDeviation'; } |
|
elsif($sortBy eq "Skew.") { $data = ':skewness'; } |
|
elsif($sortBy eq "D.F.1st") { $data = ':discriminationFactor1'; } |
|
elsif($sortBy eq "D.F.2nd") { $data = ':discriminationFactor2'; } |
|
else { return \@problems; } |
|
|
|
my %temp; |
|
my @sequenceList=(); |
|
foreach(@problems) { |
|
my ($sequence) = split(':', $_); |
|
|
|
my @array=(); |
|
my $tempArray; |
|
if(defined($temp{$sequence})) { |
|
$tempArray = $temp{$sequence}; |
|
} else { |
|
push(@sequenceList, $sequence); |
|
$tempArray = \@array; |
|
$temp{$sequence} = $tempArray; |
|
} |
|
|
|
push(@$tempArray, $_); |
|
} |
|
|
|
my @orderedProblems; |
|
if($sortProblems eq "Sort Within Sequence") { |
|
foreach(keys(%temp)) { |
|
my $tempArray = $temp{$_}; |
|
my @tempOrder = |
|
sort { $problemData->{$a.$data} <=> $problemData->{$b.$data} } |
|
@$tempArray; |
|
$temp{$_} = \@tempOrder; |
|
} |
|
foreach(@sequenceList) { |
|
my $tempArray = $temp{$_}; |
|
@orderedProblems = (@orderedProblems, @$tempArray); |
|
} |
|
} else { |
|
@orderedProblems = |
|
sort { $problemData->{$a.$data} <=> $problemData->{$b.$data} } |
|
@problems; |
|
} |
|
|
|
if($ascend eq 'Descending') { |
|
@orderedProblems = reverse(@orderedProblems); |
|
} |
|
|
|
return \@orderedProblems; |
|
} |
|
|
|
sub CalculateStatistics { |
|
my ($data, $cache, $courseID)=@_; |
|
|
|
my @problems = split(':::', $data->{'problemList'}); |
|
foreach(@problems) { |
|
# Mean |
|
my $mean = ($data->{$_.':studentCount'}) ? |
|
($data->{$_.':totalTries'} / $data->{$_.':studentCount'}) : 0; |
|
$data->{$_.':mean'} = sprintf("%.2f", $mean); |
|
|
|
# %Wrong |
|
my $pw = ($data->{$_.':studentCount'}) ? |
|
(($data->{$_.':wrong'} / $data->{$_.':studentCount'}) * 100.0) : |
|
100.0; |
|
$data->{$_.':percentWrong'} = sprintf("%.1f", $pw); |
|
|
|
# Degree of Difficulty |
|
my $dod = ($data->{$_.':totalTries'}) ? |
|
(1 - (($data->{$_.':correct'} + $data->{$_.':correctByOverride'}) / |
|
$data->{$_.':totalTries'})) : 0; |
|
|
|
$data->{$_.':degreeOfDifficulty'} = sprintf("%.2f", $dod); |
|
|
|
# Factor in mean |
|
my @studentTries = split(':::', $data->{$_.':studentTries'}); |
|
foreach(my $index=0; $index < scalar(@studentTries); $index++) { |
|
$studentTries[$index] -= $mean; |
|
} |
|
my $sumSquared = 0; |
|
my $sumCubed = 0; |
|
foreach(@studentTries) { |
|
my $squared = ($_ * $_); |
|
my $cubed = ($squared * $_); |
|
$sumSquared += $squared; |
|
$sumCubed += $cubed; |
|
} |
|
|
|
# Standard deviation |
|
my $standardDeviation; |
|
if($data->{$_.':studentCount'} - 1 > 0) { |
|
$standardDeviation = (sqrt($sumSquared)) / |
|
($data->{$_.':studentCount'} - 1); |
|
} else { |
|
$standardDeviation = 0.0; |
|
} |
|
$data->{$_.':standardDeviation'} = sprintf("%.1f", $standardDeviation); |
|
|
|
# Skewness |
|
my $skew; |
|
if($standardDeviation > 0.0999 && $data->{$_.':studentCount'} > 0) { |
|
$skew = (((sqrt($sumSquared)) / $data->{$_.':studentCount'}) / |
|
($standardDeviation * |
|
$standardDeviation * |
|
$standardDeviation)); |
|
} else { |
|
$skew = 0.0; |
|
} |
|
|
|
$data->{$_.':skewness'} = sprintf("%.1f", $skew); |
|
|
|
# Discrimination Factor 1 |
|
my ($sequence, $problem, $part) = split(':', $_); |
|
|
|
my @upper1 = split(':::', $data->{'studentsUpperListCriterion1'}); |
|
my @lower1 = split(':::', $data->{'studentsLowerListCriterion1'}); |
|
|
|
my $upper1Sum=0; |
|
foreach my $name (@upper1) { |
|
$upper1Sum += $cache->{"$name:$problem:$part:awarded"}; |
|
} |
|
$upper1Sum = (scalar(@upper1)) ? ($upper1Sum/(scalar(@upper1))) : 0; |
|
|
|
my $lower1Sum=0; |
|
foreach my $name (@lower1) { |
|
$lower1Sum += $cache->{"$name:$problem:$part:awarded"}; |
|
} |
|
$lower1Sum = (scalar(@lower1)) ? ($lower1Sum/(scalar(@lower1))) : 0; |
|
|
|
my $df1 = $upper1Sum - $lower1Sum; |
|
$data->{$_.':discriminationFactor1'} = sprintf("%.2f", $df1); |
|
|
|
# Discrimination Factor 2 |
|
my @upper2 = split(':::', $data->{'studentsUpperListCriterion2'}); |
|
my @lower2 = split(':::', $data->{'studentsLowerListCriterion2'}); |
|
|
|
my $upper2Sum=0; |
|
foreach my $name (@upper2) { |
|
$upper2Sum += $cache->{"$name:$problem:$part:awarded"}; |
|
} |
|
$upper2Sum = (scalar(@upper2)) ? ($upper2Sum/(scalar(@upper2))) : 0; |
|
|
|
my $lower2Sum=0; |
|
foreach my $name (@lower2) { |
|
$lower2Sum += $cache->{"$name:$problem:$part:awarded"}; |
|
} |
|
$lower2Sum = (scalar(@lower2)) ? ($lower2Sum/(scalar(@lower2))) : 0; |
|
|
|
my $df2 = $upper2Sum - $lower2Sum; |
|
$data->{$_.':discriminationFactor2'} = sprintf("%.2f", $df2); |
|
|
|
my %storestats; |
|
my $Average = ($data->{$_.':studentCount'}) ? |
|
$data->{$_.':totalTries'}/$data->{$_.':studentCount'} : 0; |
|
$storestats{$courseID.'___'.$cache->{$sequence.':source'}. |
|
'___timestamp'}=time; |
|
$storestats{$courseID.'___'.$cache->{$sequence.':source'}. |
|
'___stdno'}=$data->{$_.':studentCount'}; |
|
$storestats{$courseID.'___'.$cache->{$sequence.':source'}. |
|
'___avetries'}=$Average; |
|
$storestats{$courseID.'___'.$cache->{$sequence.':source'}. |
|
'___difficulty'}=$data->{$_.':degreeOfDifficulty'}; |
|
$cache->{$sequence.':source'} =~ /^(\w+)\/(\w+)/; |
|
if($data->{$_.':studentCount'}) { |
|
&Apache::lonnet::put('nohist_resevaldata',\%storestats,$1,$2); |
|
} |
|
} |
|
|
|
return; |
|
} |
|
|
|
#---- END Problem Statistics Web Page ---------------------------------------- |
#---- END Problem Statistics Web Page ---------------------------------------- |
|
|
1; |
1; |