version 1.21, 2002/08/13 13:57:25
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version 1.47, 2003/03/27 19:26:33
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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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=head1 NAME |
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lonproblemstatistics |
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=head1 SYNOPSIS |
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Routines to present problem statistics to instructors via tables, |
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Excel files, and plots. |
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=over 4 |
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=cut |
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############################################### |
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############################################### |
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package Apache::lonproblemstatistics; |
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use strict; |
use strict; |
use Apache::lonnet(); |
use Apache::lonnet(); |
use Apache::lonhtmlcommon; |
use Apache::lonhtmlcommon; |
use Apache::loncoursedata; |
use Apache::loncoursedata; |
use GDBM_File; |
use Apache::lonstatistics; |
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use Spreadsheet::WriteExcel; |
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my $jr; |
############################################### |
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############################################### |
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sub BuildProblemStatisticsPage { |
=pod |
my ($cacheDB, $students, $courseID, $c, $r)=@_; |
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my %cache; |
=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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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>Sections</b></td>'; |
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$Str .= '<td align="center"><b>Sequences and Folders</b></td>'; |
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$Str .= '<td align="center"><b>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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# |
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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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$Str .= '</td><td>'."\n"; |
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$Str .= &CreateAndParseOutputSelector(); |
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$Str .= '</td></tr>'."\n"; |
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$Str .= '</table>'."\n"; |
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return $Str; |
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} |
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$jr = $r; |
####################################################### |
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####################################################### |
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unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) { |
=pod |
$r->print('Unable to tie database.'); |
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return; |
=item &CreateAndParseOutputSelector() |
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Construct a selection list of options for output and parse output selections. |
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The current output selected is indicated by the values of the two package |
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variables $output_mode and $show. @OutputOptions holds the descriptions of |
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the output options and the values for $output_mode and $show. |
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Based on code from lonstudentassessment.pm. |
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=cut |
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####################################################### |
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####################################################### |
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my $output_mode; |
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my $show; |
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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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{ name => 'Degree of Difficulty Plot', |
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value => 'plot deg diff', |
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description => 'Generate a plot of the degree of difficulty of each '. |
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'problem part.', |
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mode => 'plot', |
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show => 'deg of diff', |
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}, |
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{ name => 'Percent Wrong Plot', |
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value => 'plot per wrong', |
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description => 'Generate a plot showing the percent of students who '. |
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'were unable to complete each problem part', |
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mode => 'plot', |
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show => 'per wrong', |
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}, |
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); |
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sub OutputDescriptions { |
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my $Str = ''; |
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$Str .= "<h2>Output Modes</h2>\n"; |
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$Str .= "<dl>\n"; |
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foreach my $outputmode (@OutputOptions) { |
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$Str .=" <dt>".$outputmode->{'name'}."</dt>\n"; |
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$Str .=" <dd>".$outputmode->{'description'}."</dd>\n"; |
} |
} |
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$Str .= "</dl>\n"; |
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return $Str; |
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} |
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my $Ptr = ''; |
sub CreateAndParseOutputSelector { |
$Ptr .= '<table border="0"><tbody>'; |
my $Str = ''; |
$Ptr .= '<tr><td align="right"><b>Select Map</b></td>'."\n"; |
my $elementname = 'statsoutputmode'; |
$Ptr .= '<td align="left">'; |
# |
$Ptr .= &Apache::lonhtmlcommon::MapOptions(\%cache, 'ProblemStatistics', |
# Format for output options is 'mode, restrictions'; |
'Statistics'); |
my $selected = 'HTML problem statistics grouped'; |
$Ptr .= '</td></tr>'."\n"; |
if (exists($ENV{'form.'.$elementname})) { |
$Ptr .= '<tr><td align="right"><b>Sorting Type:</b></td>'."\n"; |
if (ref($ENV{'form.'.$elementname} eq 'ARRAY')) { |
$Ptr .= '<td align="left">'."\n"; |
$selected = $ENV{'form.'.$elementname}->[0]; |
$Ptr .= &Apache::lonhtmlcommon::AscendOrderOptions( |
} else { |
$cache{'ProblemStatisticsAscend'}, |
$selected = $ENV{'form.'.$elementname}; |
'ProblemStatistics', |
} |
'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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$Ptr .= '</table>'; |
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if($cache{'DisplayLegend'} eq 'Show Legend') { |
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$Ptr .= &ProblemStatisticsLegend(); |
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} |
} |
$r->print($Ptr); |
# |
$r->rflush(); |
# Set package variables describing output mode |
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$output_mode = 'html'; |
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$show = 'all'; |
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foreach my $option (@OutputOptions) { |
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next if ($option->{'value'} ne $selected); |
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$output_mode = $option->{'mode'}; |
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$show = $option->{'show'}; |
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} |
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# |
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# Build the form element |
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$Str = qq/<select size="5" name="$elementname">/; |
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foreach my $option (@OutputOptions) { |
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$Str .= "\n".' <option value="'.$option->{'value'}.'"'; |
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$Str .= " selected " if ($option->{'value'} eq $selected); |
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$Str .= ">".$option->{'name'}."<\/option>"; |
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} |
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$Str .= "\n</select>"; |
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return $Str; |
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} |
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my @Header = ("Homework Sets Order","#Stdnts","Tries","Mod", |
############################################### |
"Mean","#YES","#yes","%Wrng","DoDiff", |
############################################### |
"S.D.","Skew.","D.F.1st","D.F.2nd","Disc."); |
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my $color=&setbgcolor(0); |
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# my %Discuss=&Apache::loncoursedata::LoadDiscussion($courseID); |
=pod |
# my ($upper, $lower) = &Discriminant(\%discriminant,$r); |
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if(!defined($cache{'StatisticsCached'})) { |
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untie(%cache); |
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&Apache::loncoursedata::DownloadStudentCourseDataSeparate($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, $c); |
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if($c->aborted()) { return; } |
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unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) { |
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$r->print('Unable to tie database.'); |
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return; |
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} |
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my ($problemData) = &ExtractStudentData(\%cache, $students); |
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&CalculateStatistics($problemData); |
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untie(%cache); |
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unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_WRCREAT(),0640)) { |
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$r->print('Unable to tie database.'); |
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return; |
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} |
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foreach(keys(%$problemData)) { |
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$cache{$_} = $problemData->{$_}; |
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} |
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$cache{'StatisticsCached'} = 'true'; |
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untie(%cache); |
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unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) { |
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$r->print('Unable to tie database.'); |
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return; |
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} |
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} |
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my $orderedProblems = &SortProblems(\%cache, |
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$cache{'ProblemStatisticsSort'}, |
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$cache{'ProblemStatisticsAscend'}); |
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&BuildStatisticsTable(\%cache, $cache{'DisplayFormat'}, $orderedProblems, |
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\@Header, $r, $color); |
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untie(%cache); |
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return; |
=item &Gather_Student_Data() |
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Ensures all student data is up to date. |
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=cut |
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############################################### |
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############################################### |
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sub Gather_Student_Data { |
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my ($r) = @_; |
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my $c = $r->connection(); |
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# |
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my @Sequences = &Apache::lonstatistics::Sequences_with_Assess(); |
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# |
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my @Students = @Apache::lonstatistics::Students; |
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# |
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# Open the progress window |
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my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin |
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($r,'Statistics Compilation Status', |
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'Statistics Compilation Progress', scalar(@Students)); |
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# |
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while (my $student = shift @Students) { |
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return if ($c->aborted()); |
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my ($status,undef) = &Apache::loncoursedata::ensure_current_data |
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($student->{'username'},$student->{'domain'}, |
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$ENV{'request.course.id'}); |
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&Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state, |
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'last student'); |
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} |
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&Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state); |
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$r->rflush(); |
} |
} |
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############################################### |
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############################################### |
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#---- Problem Statistics Web Page --------------------------------------- |
=pod |
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sub CreateProblemStatisticsTableHeading { |
=item &BuildProblemStatisticsPage() |
my ($headings,$r)=@_; |
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my $Str=''; |
Main interface to problem statistics. |
$Str .= '<tr>'."\n"; |
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$Str .= '<th bgcolor="#ffffe6">P#</th>'."\n"; |
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foreach(@$headings) { |
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$Str .= '<th bgcolor="#ffffe6">'.'<a href="/adm/statistics?reportSelected='; |
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$Str .= &Apache::lonnet::escape('Problem Statistics'); |
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$Str .= '&ProblemStatisticsSort='; |
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$Str .= &Apache::lonnet::escape($_).'">'.$_.'</a> </th>'."\n"; |
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} |
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$Str .= "\n".'</tr>'."\n"; |
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return $Str; |
=cut |
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############################################### |
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############################################### |
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sub BuildProblemStatisticsPage { |
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my ($r,$c)=@_; |
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# |
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$output_mode = 'html'; |
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$show = 'grouped'; |
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# |
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$r->print(&CreateInterface()); |
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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="'.$ENV{'form.sortby'}. |
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'" />'); |
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if (! exists($ENV{'form.statsfirstcall'})) { |
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$r->print(<<ENDMSG); |
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<p> |
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<font size="+1"> |
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Please make your selections in the boxes above and hit |
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the button marked "Update Display". |
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</font> |
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</p> |
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ENDMSG |
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return; |
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} |
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# |
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&Gather_Student_Data($r); |
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# |
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# |
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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>Preparing Excel Spreadsheet</h2>"); |
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&output_excel($r); |
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} elsif ($output_mode eq 'plot') { |
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if ($show eq 'deg of diff') { |
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&plot_statistics($r,'DoDiff'); |
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} elsif ($show eq 'per wrong') { |
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&plot_statistics($r,'%Wrng'); |
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} |
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} else { |
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$r->print("<h1>Not implemented</h1>"); |
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} |
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return; |
} |
} |
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sub BuildStatisticsTable { |
############################################### |
my ($cache,$displayFormat,$orderedProblems,$headings,$r,$color)=@_; |
############################################### |
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=pod |
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#6666666 |
=item &output_html_grouped_by_sequence() |
# my $file="/home/httpd/perl/tmp/183d.txt"; |
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# open(OUT, ">$file"); |
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#6666666 |
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## &Apache::lonstatistics::Create_PrgWin($r); |
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##777777 |
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## my (%Activity) = &LoadActivityLog(); |
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## $r->print('<script>popwin.document.popremain.remaining.value="'. |
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## 'Loading Discussion...";</script>'); |
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## my ($doDiffFile) = &LoadDoDiffFile(); |
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##777777 |
Presents the statistics data as an html table organized by the order |
## $Str .= &Classify($discriminantFactor, $students); |
the assessments appear in the course. |
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if($displayFormat ne 'Display CSV Format') { |
=cut |
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############################################### |
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############################################### |
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sub output_html_grouped_by_sequence { |
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my ($r) = @_; |
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my $problem_num = 0; |
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#$r->print(&ProblemStatisticsLegend()); |
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my @Header = ("Title","Part","#Stdnts","Tries","Mod", |
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"Mean","#YES","#yes","%Wrng","DoDiff", |
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"S.D.","Skew.");#,"D.F.1st","D.F.2nd"); |
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# #FFFFE6 #EEFFCC #DDFFFF FFDDDD #DDFFDD #FFDDFF |
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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>"); |
$r->print('<table border="0"><tr><td bgcolor="#777777">'."\n"); |
$r->print('<table border="0"><tr><td bgcolor="#777777">'."\n"); |
$r->print('<table border="0" cellpadding="3">'."\n"); |
$r->print('<table border="0" cellpadding="3">'."\n"); |
$r->print(&CreateProblemStatisticsTableHeading($headings, $r)); |
$r->print('<tr bgcolor="#FFFFE6"><th>'. |
} else { |
join("</th><th>",@Header)."</th></tr>\n"); |
$r->print('<br>'); |
foreach my $resource (@{$sequence->{'contents'}}) { |
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next if ($resource->{'type'} ne 'assessment'); |
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foreach my $part (@{$resource->{'parts'}}) { |
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$problem_num++; |
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my ($num,$tries,$mod,$mean,$Solved,$solved,$DegOfDiff,$STD, |
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$SKEW) = &Apache::loncoursedata::get_problem_statistics |
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(undef,$resource->{'symb'},$part, |
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$ENV{'request.course.id'}); |
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# |
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$part = ' ' if ($part == 0); |
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# |
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my $wrongpercent = 0; |
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if (defined($num) && $num > 0) { |
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$wrongpercent=int(10*100*($num-$Solved+$solved)/$num)/10; |
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} |
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my $option = ''; |
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$r->print('<tr>'.&statistics_html_table_data |
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($resource,$part,$num,$tries,$mod,$mean,$Solved, |
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$solved,$wrongpercent,$DegOfDiff,$STD,$SKEW, |
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$option). |
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"</tr>\n"); |
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} |
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} |
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$r->print("</table>\n"); |
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$r->print("</td></tr></table>\n"); |
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$r->rflush(); |
} |
} |
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# |
my $count = 1; |
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foreach(@$orderedProblems) { |
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my ($sequence,$problem,$part)=split(':', $_); |
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# if($cache->{'ProblemStatisticsMaps'} ne 'All Maps' && |
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# $cache->{'ProblemStatisticsMaps'} ne $cache->{$sequence.':title'}) { |
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# next; |
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# } |
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my $ref = '<a href="'.$cache->{$problem.':source'}. |
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'" target="_blank">'.$cache->{$problem.':title'}.'</a>'; |
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# my $ref = $cache->{$problem.':title'}; |
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my $title = $cache->{$problem.':title'}; |
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my $source = 'source'; |
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my $tableData = join('&', $ref, $title, $source, |
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$cache->{$_.':studentCount'}, |
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$cache->{$_.':totalTries'}, |
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$cache->{$_.':maxTries'}, |
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sprintf("%.2f", $cache->{$_.':mean'}), |
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$cache->{$_.':correct'}, |
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$cache->{$_.':correctByOverride'}, |
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sprintf("%.1f", $cache->{$_.':percentWrong'}), |
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sprintf("%.2f", $cache->{$_.':degreeOfDifficulty'}), |
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sprintf("%.1f", $cache->{$_.':standardDeviation'}), |
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sprintf("%.1f", $cache->{$_.':skewness'}), |
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sprintf("%.2f", $cache->{$_.':discriminationFactor1'}), |
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sprintf("%.2f", $cache->{$_.':discriminationFactor2'}), |
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0); # 0 is for discussion, need to figure out |
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#6666666 |
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# $r->print('<br>'.$out.'&'.$DoD); |
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# print (OUT $out.'@'.$DoD.'&'); |
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#6666666 |
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#check with Gerd |
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# $urlres=~/^(\w+)\/(\w+)/; |
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# if ($StdNo) { |
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# &Apache::lonnet::put('nohist_resevaldata',\%storestats, |
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# $1,$2); |
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# } |
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#-------------------------------- Row of statistical table |
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&TableRow($displayFormat,$tableData,$count,$r,$color); |
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$count++; |
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} |
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if($cache->{'DisplayFormat'} ne 'Display CSV Format') { |
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$r->print('</table>'."\n"); |
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} |
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$r->print('</td></tr></table>'); |
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#6666666 |
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# close( OUT ); |
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#666666 |
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return; |
return; |
} |
} |
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sub TableRow { |
############################################### |
my ($displayFormat,$Str,$RealIdx,$r,$color)=@_; |
############################################### |
my($ref,$title,$source,$StdNo,$TotalTries,$MxTries,$Avg,$YES,$Override, |
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$Wrng,$DoD,$SD,$Sk,$_D1,$_D2,$DiscNo,$Prob)=split(/\&/,$Str); |
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my $Ptr; |
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if($displayFormat eq 'Display CSV Format') { |
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$Ptr="\n".'<br>'. |
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"\n".'"'.$RealIdx.'",'. |
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"\n".'"'.$title.'",'. |
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"\n".'"'.$source.'",'. |
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"\n".'"'.$StdNo.'",'. |
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"\n".'"'.$TotalTries.'",'. |
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"\n".'"'.$MxTries.'",'. |
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"\n".'"'.$Avg.'",'. |
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"\n".'"'.$YES.'",'. |
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"\n".'"'.$Override.'",'. |
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"\n".'"'.$Wrng.'",'. |
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"\n".'"'.$DoD.'",'. |
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"\n".'"'.$SD.'",'. |
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"\n".'"'.$Sk.'",'. |
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"\n".'"'.$_D1.'",'. |
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"\n".'"'.$_D2.'"'. |
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"\n".'"'.$DiscNo.'"'; |
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$r->print("\n".$Ptr); |
=pod |
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=item &output_html_ungrouped() |
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|
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Presents the statistics data in a single html table which can be sorted by |
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different columns. |
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|
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=cut |
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############################################### |
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############################################### |
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sub output_html_ungrouped { |
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my ($r,$option) = @_; |
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# |
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my $problem_num = 0; |
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my $show_container = 0; |
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my $show_part = 0; |
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#$r->print(&ProblemStatisticsLegend()); |
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my @Header = ("Title","Part","#Stdnts","Tries","Mod", |
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"Mean","#YES","#yes","%Wrng","DoDiff", |
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"S.D.","Skew");#,"D.F.1st","D.F.2nd"); |
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# |
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my $sortby = undef; |
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foreach (@Header) { |
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if ($ENV{'form.sortby'} eq $_) { |
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$sortby = $_; |
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} |
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} |
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if (! defined($sortby) || $sortby eq '') { |
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$sortby = 'Container'; |
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} |
|
# If there is more than one sequence, list their titles |
|
my @Sequences = &Apache::lonstatistics::Sequences_with_Assess(); |
|
if (@Sequences > 1) { |
|
unshift(@Header,"Container"); |
|
$show_container = 1; |
|
} |
|
# |
|
# If the option for showing the problem number is needed, push that |
|
# on the list too |
|
if (defined($option) && $option =~ /show probnum/) { |
|
unshift(@Header,"P#"); |
|
} |
|
# |
|
$r->print('<table border="0"><tr><td bgcolor="#777777">'."\n"); |
|
$r->rflush(); |
|
# |
|
# 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'}}) { |
|
$problem_num++; |
|
my ($num,$tries,$mod,$mean,$Solved,$solved,$DegOfDiff,$STD, |
|
$SKEW) = &Apache::loncoursedata::get_problem_statistics |
|
(undef,$resource->{'symb'},$part, |
|
$ENV{'request.course.id'}); |
|
# |
|
$show_part = 1 if ($part ne '0'); |
|
$part = ' ' if ($part == 0); |
|
# |
|
my $wrongpercent = 0; |
|
if (defined($num) && $num > 0) { |
|
$wrongpercent=int(10*100*($num-$Solved+$solved)/$num)/10; |
|
} |
|
push (@Statsarray, |
|
{ 'sequence' => $sequence, |
|
'resource' => $resource, |
|
'Title' => $resource->{'title'}, |
|
'Part' => $part, |
|
'#Stdnts' => $num, |
|
'Tries' => $tries, |
|
'Mod' => $mod, |
|
'Mean' => $mean, |
|
'#YES' => $Solved, |
|
'#yes' => $solved, |
|
'%Wrng' => $wrongpercent, |
|
'DoDiff' => $DegOfDiff, |
|
'S.D.' => $STD, |
|
'Skew' => $SKEW, |
|
'problem_num' => $problem_num, |
|
}); |
|
} |
|
} |
|
} |
|
# |
|
# Table Headers |
|
$r->print('<table border="0" cellpadding="3">'."\n"); |
|
my $Str = ''; |
|
foreach (@Header) { |
|
next if ($_ eq 'Part' && !$show_part); |
|
# Do not allow sorting on some fields |
|
if ($_ eq $sortby || /^(Part|P\#)$/) { |
|
$Str .= '<th>'.$_.'</th>'; |
|
} else { |
|
$Str .= '<th>'. |
|
'<a href="javascript:document.Statistics.sortby.value='."'$_'". |
|
';document.Statistics.submit();">'. |
|
$_.'</a></th>'; |
|
} |
|
} |
|
$r->print('<tr bgcolor="#FFFFE6">'.$Str."</tr>\n"); |
|
# |
|
# Sort the data |
|
my @OutputOrder; |
|
if ($sortby eq 'Container') { |
|
@OutputOrder = @Statsarray; |
} else { |
} else { |
$Ptr="\n".'<tr>'. |
# $sortby is already defined, so we can charge ahead |
"\n".'<td bgcolor="#ffffe6">'.$RealIdx.'</td>'. |
if ($sortby =~ /^(title|part)$/i) { |
"\n".'<td bgcolor="#ffffe6">'.$ref.'</td>'. |
# Alpha comparison |
"\n".'<td bgcolor='.$color->{"yellow"}.'> '.$StdNo.'</td>'. |
@OutputOrder = sort { |
"\n".'<td bgcolor='.$color->{"yellow"}.'>'.$TotalTries.'</td>'. |
lc($a->{$sortby}) cmp lc($b->{$sortby}) || |
"\n".'<td bgcolor='.$color->{"yellow"}.'>'.$MxTries.'</td>'. |
lc($a->{'Title'}) cmp lc($b->{'Title'}) || |
"\n".'<td bgcolor='.$color->{"gb"}.'>'.$Avg.'</td>'. |
lc($a->{'Part'}) cmp lc($b->{'Part'}); |
"\n".'<td bgcolor='.$color->{"gb"}.'> '.$YES.'</td>'. |
} @Statsarray; |
"\n".'<td bgcolor='.$color->{"gb"}.'> '.$Override.'</td>'. |
} else { |
"\n".'<td bgcolor='.$color->{"red"}.'> '.$Wrng.'</td>'. |
# Numerical comparison |
"\n".'<td bgcolor='.$color->{"red"}.'> '.$DoD.'</td>'. |
@OutputOrder = sort { |
"\n".'<td bgcolor='.$color->{"green"}.'> '.$SD.'</td>'. |
my $retvalue = 0; |
"\n".'<td bgcolor='.$color->{"green"}.'> '.$Sk.'</td>'. |
if ($b->{$sortby} eq 'nan') { |
"\n".'<td bgcolor='.$color->{"purple"}.'> '.$_D1.'</td>'. |
if ($a->{$sortby} ne 'nan') { |
"\n".'<td bgcolor='.$color->{"purple"}.'> '.$_D2.'</td>'. |
$retvalue = -1; |
"\n".'<td bgcolor='.$color->{"yellow"}.'> '.$DiscNo.'</td>'; |
} else { |
$r->print("\n".$Ptr.'</tr>' ); |
$retvalue = 0; |
|
} |
|
} |
|
if ($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; |
|
} |
} |
} |
|
$option .= ',no part' if (! $show_part); |
|
foreach my $row (@OutputOrder) { |
|
$r->print('<tr>'); |
|
if (defined($option) && $option =~ /show probnum/) { |
|
$r->print('<td bgcolor="#FFFFE6">'.$row->{'problem_num'}.'</td>'); |
|
} |
|
if ($show_container) { |
|
$r->print('<td bgcolor="#FFFFE6">' |
|
.$row->{'sequence'}->{'title'}.'</td>'); |
|
} |
|
$r->print(&statistics_html_table_data |
|
($row->{'resource'},$row->{'Part'},$row->{'#Stdnts'}, |
|
$row->{'Tries'},$row->{'Mod'},$row->{'Mean'}, |
|
$row->{'#YES'},$row->{'#yes'},$row->{"\%Wrng"}, |
|
$row->{'DoDiff'},$row->{'S.D.'},$row->{'Skew'}, |
|
$option)); |
|
$r->print("</tr>\n"); |
|
} |
|
$r->print("</table>\n"); |
|
$r->print("</td></tr></table>\n"); |
|
$r->rflush(); |
|
# |
return; |
return; |
} |
} |
|
|
# For loading the colored table for display or un-colored for print |
############################################### |
sub setbgcolor { |
############################################### |
my $PrintTable=shift; |
|
my %color; |
=pod |
if ($PrintTable){ |
|
$color{"gb"}="#FFFFFF"; |
=item &output_excel() |
$color{"red"}="#FFFFFF"; |
|
$color{"yellow"}="#FFFFFF"; |
Presents the statistical data in an Excel 95 compatable spreadsheet file. |
$color{"green"}="#FFFFFF"; |
|
$color{"purple"}="#FFFFFF"; |
=cut |
} else { |
|
$color{"gb"}="#DDFFFF"; |
############################################### |
$color{"red"}="#FFDDDD"; |
############################################### |
$color{"yellow"}="#EEFFCC"; |
sub output_excel { |
$color{"green"}="#DDFFDD"; |
my ($r) = @_; |
$color{"purple"}="#FFDDFF"; |
my $filename = '/prtspool/'. |
} |
$ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'. |
|
time.'_'.rand(1000000000).'.xls'; |
return \%color; |
# |
} |
my $excel_workbook = undef; |
|
my $excel_sheet = undef; |
sub ProblemStatisticsButtons { |
# |
my ($displayFormat, $displayLegend)=@_; |
my $rows_output = 0; |
|
my $cols_output = 0; |
my $Ptr = '<tr><td></td><td align="left">'; |
# |
$Ptr .= '<input type="submit" name="DoDiffGraph" '; |
# Create sheet |
$Ptr .= 'value="DoDiff Graph" />'."\n"; |
$excel_workbook = Spreadsheet::WriteExcel->new('/home/httpd'.$filename); |
$Ptr .= ' '; |
# |
$Ptr .= '<input type="submit" name="PercentWrongGraph" '; |
# Check for errors |
$Ptr .= 'value="%Wrong Graph" />'."\n"; |
if (! defined($excel_workbook)) { |
$Ptr .= '</td></tr><tr><td></td><td>'."\n"; |
$r->log_error("Error creating excel spreadsheet $filename: $!"); |
$Ptr .= '<input type="submit" name="DisplayLegend" '; |
$r->print("Problems creating new Excel file. ". |
if($displayLegend eq 'Show Legend') { |
"This error has been logged. ". |
$Ptr .= 'value="Hide Legend" />'."\n"; |
"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 = $excel_workbook->addworksheet($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 { |
} else { |
$Ptr .= 'value="Show Legend" />'."\n"; |
if ($Sections[0] eq 'all') { |
|
$sectionstring = "All sections"; |
|
} else { |
|
$sectionstring = "Section ".$Sections[0]; |
|
} |
} |
} |
$Ptr .= ' '; |
$excel_sheet->write($rows_output,$cols_output++,$sectionstring); |
$Ptr .= '<input type="submit" name="DisplayCSVFormat" '; |
$cols_output += scalar(@Sections); |
if($displayFormat eq 'Display CSV Format') { |
# |
$Ptr .= 'value="Display Table Format" />'."\n"; |
# Put the date in there too |
} else { |
$excel_sheet->write($rows_output,$cols_output++, |
$Ptr .= 'value="Display CSV Format" />'."\n"; |
'Compiled on '.localtime(time)); |
|
# |
|
$rows_output++; |
|
$cols_output=0; |
|
# |
|
# Add the headers |
|
my @Header = ("Container","Title","Part","#Stdnts","Tries","Mod", |
|
"Mean","#YES","#yes","%Wrng","DoDiff", |
|
"S.D.","Skew.");#,"D.F.1st","D.F.2nd"); |
|
foreach (@Header) { |
|
$excel_sheet->write($rows_output,$cols_output++,$_); |
|
} |
|
$rows_output++; |
|
# |
|
# Write the data |
|
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'}}) { |
|
$cols_output=0; |
|
my ($num,$tries,$mod,$mean,$Solved,$solved,$DegOfDiff,$STD, |
|
$SKEW) = &Apache::loncoursedata::get_problem_statistics |
|
(undef,$resource->{'symb'},$part, |
|
$ENV{'request.course.id'}); |
|
# |
|
if (!defined($part) || $part eq '') { |
|
$part = ' '; |
|
} |
|
my $wrongpercent = 0; |
|
if (defined($num) && $num > 0) { |
|
$wrongpercent=int(10*100*($num-$Solved+$solved)/$num)/10; |
|
} |
|
foreach ($sequence->{'title'},$resource->{'title'},$part, |
|
$num,$tries,$mod,$mean,$Solved,$solved,$wrongpercent, |
|
$DegOfDiff,$STD,$SKEW) { |
|
$excel_sheet->write($rows_output,$cols_output++,$_); |
|
} |
|
$rows_output++; |
|
} |
|
} |
} |
} |
$Ptr .= '</td></tr>'; |
# |
|
# Write the excel file |
|
$excel_workbook->close(); |
|
# Tell the user where to get their excel file |
|
$r->print('<br />'. |
|
'<a href="'.$filename.'">Your Excel spreadsheet.</a>'."\n"); |
|
$r->rflush(); |
|
return; |
|
} |
|
|
return $Ptr; |
############################################### |
|
############################################### |
|
|
|
=pod |
|
|
|
=item &statistics_html_table_data() |
|
|
|
Help function used to format the rows for HTML table output. |
|
|
|
=cut |
|
|
|
############################################### |
|
############################################### |
|
sub statistics_html_table_data { |
|
my ($resource,$part,$num,$tries,$mod,$mean,$Solved,$solved,$wrongpercent, |
|
$DegOfDiff,$STD,$SKEW,$options) = @_; |
|
my $row = ''; |
|
$row .= '<td bgcolor="#FFFFE6">'. |
|
'<a href="'.$resource->{'src'}.'" target="_blank" >'. |
|
$resource->{'title'}.'</a>'. |
|
'</td>'; |
|
$row .= '<td bgcolor="#FFFFE6">'.$part.'</td>' if ($options !~ /no part/); |
|
foreach ($num,$tries) { |
|
$row .= '<td bgcolor="#EEFFCC" align="right">'.$_.'</td>'; |
|
} |
|
foreach ($mod) { |
|
$row .= '<td bgcolor="#DDFFFF" align="right">'.$_.'</td>'; |
|
} |
|
foreach ($mean) { |
|
$row .= '<td bgcolor="#DDFFFF" align="right">'. |
|
sprintf("%5.2f",$_).'</td>'; |
|
} |
|
foreach ($Solved,$solved) { |
|
$row .= '<td bgcolor="#DDFFFF" align="right">'.$_.'</td>'; |
|
} |
|
foreach ($wrongpercent) { |
|
$row .= '<td bgcolor="#DDFFFF" align="right">'. |
|
sprintf("%5.1f",$_).'</td>'; |
|
} |
|
foreach ($DegOfDiff,$STD,$SKEW) { |
|
$row .= '<td bgcolor="#FFDDDD" align="right">'. |
|
sprintf("%5.2f",$_).'</td>'; |
|
} |
|
return $row; |
|
} |
|
|
|
############################################### |
|
############################################### |
|
|
|
=pod |
|
|
|
=item &plot_statistics() |
|
|
|
=cut |
|
|
|
############################################### |
|
############################################### |
|
sub plot_statistics { |
|
my ($r,$datafield) = @_; |
|
my @Data; |
|
# |
|
my %Fields = ('#Stdnts'=> 0, |
|
'Tries' => 1, |
|
'Mod' => 2, |
|
'Mean' => 3, |
|
'#YES' => 4, |
|
'#yes' => 5, |
|
'%Wrng' => 9, |
|
'DoDiff' => 6, |
|
'S.D.' => 7, |
|
'Skew' => 8,); |
|
# |
|
my $field = '%Wrng'; |
|
foreach (keys(%Fields)) { |
|
$field = $_ if ($datafield eq $_); |
|
} |
|
my $fieldindex = $Fields{$field}; |
|
# |
|
my $Max = 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 @Results = &Apache::loncoursedata::get_problem_statistics |
|
(undef,$resource->{'symb'},$part, |
|
$ENV{'request.course.id'}); |
|
my ($num,$Solved,$solved) = @Results[0,4,5]; |
|
my $wrongpercent = 0; |
|
if (defined($num) && $num > 0) { |
|
$wrongpercent=int(10*100*($num-$Solved+$solved)/$num)/10; |
|
} |
|
push (@Results,$wrongpercent); |
|
my $data = $Results[$fieldindex]; |
|
$data = 0 if ($data eq 'nan'); |
|
$Max = $data if ($Max<$data); |
|
push (@Data,$data); |
|
} |
|
} |
|
} |
|
# |
|
# Print out plot request |
|
my $title = 'Percent Wrong'; |
|
if ($field eq 'DoDiff') { |
|
$title = 'Degree of Difficulty'; |
|
} |
|
my $yaxis = 'Percent'; |
|
if ($field eq 'DoDiff') { |
|
$yaxis = ''; |
|
} elsif ($field ne '%Wrng') { |
|
$yaxis = ''; |
|
} |
|
# |
|
# Determine appropriate value for $Max |
|
if ($field eq 'DoDiff') { |
|
if ($Max > 0.5) { |
|
$Max = 1; |
|
} elsif ($Max > 0.2) { |
|
$Max = 0.5; |
|
} elsif ($Max > 0.1) { |
|
$Max = 0.2; |
|
} |
|
} elsif ($field eq '%Wrng') { |
|
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; |
|
} |
|
} |
|
|
|
$r->print("<p>".&DrawGraph(\@Data,$title,'Problem Number',$yaxis, |
|
$Max)."</p>\n"); |
|
# |
|
# Print out the data |
|
$ENV{'form.sortby'} = 'Contents'; |
|
&output_html_ungrouped($r,'show probnum'); |
|
return; |
} |
} |
|
|
|
############################################### |
|
############################################### |
|
|
|
=pod |
|
|
|
=item &DrawGraph() |
|
|
|
=cut |
|
|
|
############################################### |
|
############################################### |
|
sub DrawGraph { |
|
my ($values,$title,$xaxis,$yaxis,$Max)=@_; |
|
$title = '' if (! defined($title)); |
|
$xaxis = '' if (! defined($xaxis)); |
|
$yaxis = '' if (! defined($yaxis)); |
|
# |
|
my $sendValues = join(',', @$values); |
|
my $sendCount = scalar(@$values); |
|
if ( $Max > 1 ) { |
|
if ($Max % 10) { |
|
if ( int($Max) < $Max ) { |
|
$Max++; |
|
$Max = int($Max); |
|
} |
|
} |
|
} else { |
|
$Max = 1; |
|
} |
|
my @GData = ($title,$xaxis,$yaxis,$Max,$sendCount,$sendValues); |
|
return '<IMG src="/cgi-bin/graph.png?'. |
|
(join('&', @GData)).'" border="1" />'; |
|
} |
|
|
|
############################################### |
|
############################################### |
|
|
|
=pod |
|
|
|
=item &ProblemStatisticsLegend() |
|
|
|
=cut |
|
|
|
############################################### |
|
############################################### |
sub ProblemStatisticsLegend { |
sub ProblemStatisticsLegend { |
my $Ptr = ''; |
my $Ptr = ''; |
$Ptr = '<table border="0">'; |
$Ptr = '<table border="0">'; |
Line 368 sub ProblemStatisticsLegend {
|
Line 900 sub ProblemStatisticsLegend {
|
$Ptr .= '<b>Dis.F.</b></td>'; |
$Ptr .= '<b>Dis.F.</b></td>'; |
$Ptr .= '<td>Discrimination Factor: A Standard for evaluating the '; |
$Ptr .= '<td>Discrimination Factor: A Standard for evaluating the '; |
$Ptr .= 'problem according to a Criterion<br>'; |
$Ptr .= 'problem according to a Criterion<br>'; |
$Ptr .= '<b>[Applied Criterion in %27 Upper Students - '; |
$Ptr .= '<b>[Criterion to group students into %27 Upper Students - '; |
$Ptr .= 'Applied the same Criterion in %27 Lower Students]</b><br>'; |
$Ptr .= 'and %27 Lower Students]</b><br>'; |
$Ptr .= '<b>1st Criterion</b> for Sorting the Students: '; |
$Ptr .= '<b>1st Criterion</b> for Sorting the Students: '; |
$Ptr .= '<b>Sum of Partial Credit Awarded / Total Number of Tries</b><br>'; |
$Ptr .= '<b>Sum of Partial Credit Awarded / Total Number of Tries</b><br>'; |
$Ptr .= '<b>2nd Criterion</b> for Sorting the Students: '; |
$Ptr .= '<b>2nd Criterion</b> for Sorting the Students: '; |
Line 378 sub ProblemStatisticsLegend {
|
Line 910 sub ProblemStatisticsLegend {
|
$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 $Ptr; |
} |
} |
|
|
#------- Processing upperlist and lowerlist according to each problem |
|
|
|
sub ExtractStudentData { |
|
my ($cache, $students)=@_; |
|
|
|
#$Apache::lonxml::debug=1; |
|
#&Apache::lonhomework::showhash(%$cache); |
|
#$Apache::lonxml::debug=0; |
|
|
|
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++; |
|
} |
|
} |
|
|
|
$problemData{$id.':sequenceTitle'} = |
|
$cache->{$sequence.':title'}; |
|
$problemData{$id.':studentCount'} = $studentCount; |
|
$problemData{$id.':totalTries'} = $totalTries; |
|
$problemData{$id.':studentTries'} = \@studentTries; |
|
$problemData{$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; |
|
} |
|
} |
|
} |
|
|
|
$problemData{'problemList'} = join(':::', @problemList); |
|
# $Discussed=0; |
|
# if($Discuss->{"$name:$problem"}) { |
|
# $TotDiscuss++; |
|
# $Discussed=1; |
|
# } |
|
|
|
return \%problemData; |
|
} |
|
|
|
sub SortProblems { |
|
my ($problemData,$sortBy,$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") { $data = ':discriminantFactor1'; } |
|
elsif($sortBy eq "D.F.2nd") { $data = ':discriminantFactor2'; } |
|
elsif($sortBy eq "Disc.") { $data = ''; } |
|
else { return \@problems; } |
|
|
|
my @orderedProblems = |
|
sort { $problemData->{$a.$data} <=> $problemData->{$b.$data} } |
|
@problems; |
|
if($ascend eq 'Descending') { |
|
@orderedProblems = reverse(@orderedProblems); |
|
} |
|
|
|
return \@orderedProblems; |
|
} |
|
|
|
sub CalculateStatistics { |
|
my ($data)=@_; |
|
|
|
my @problems = split(':::', $data->{'problemList'}); |
|
foreach(@problems) { |
|
# Mean |
|
$data->{$_.':mean'} = ($data->{$_.':studentCount'}) ? |
|
($data->{$_.':totalTries'} / $data->{$_.':studentCount'}) : 0; |
|
|
|
# %Wrong |
|
$data->{$_.':percentWrong'} = ($data->{$_.':studentCount'}) ? |
|
(($data->{$_.':wrong'} / $data->{$_.':studentCount'}) * 100.0) : |
|
100.0; |
|
|
|
# Degree of Difficulty |
|
$data->{$_.':degreeOfDifficulty'} = ($data->{$_.':totalTries'}) ? |
|
(1 - (($data->{$_.':correct'} + $data->{$_.':correctByOverride'}) / |
|
$data->{$_.':totalTries'})) : 0; |
|
|
|
# Factor in mean |
|
my $studentTries = $data->{$_.':studentTries'}; |
|
foreach(my $index=0; $index < scalar(@$studentTries); $index++) { |
|
$studentTries->[$index] -= $data->{$_.':mean'}; |
|
} |
|
my $sumSquared = 0; |
|
my $sumCubed = 0; |
|
foreach(@$studentTries) { |
|
my $squared = ($_ * $_); |
|
my $cubed = ($squared * $_); |
|
$sumSquared += $squared; |
|
$sumCubed += $cubed; |
|
} |
|
|
|
# Standard deviation |
|
$data->{$_.':standardDeviation'} = ($data->{$_.':studentCount'} - 1) ? |
|
((sqrt($sumSquared)) / ($data->{$_.':studentCount'} - 1)) : 0; |
|
|
|
# Skewness |
|
my $standardDeviation = $data->{$_.':standardDeviation'}; |
|
$data->{$_.':skewness'} = ($data->{$_.':standardDeviation'}) ? |
|
(((sqrt($sumSquared)) / $data->{$_.':studentCount'}) / |
|
($standardDeviation * $standardDeviation * $standardDeviation)) : |
|
0; |
|
|
|
# Discrimination Factor 1 |
|
$data->{$_.':discriminationFactor1'} = 0; |
|
|
|
# Discrimination Factor 2 |
|
$data->{$_.':discriminationFactor2'} = 0; |
|
} |
|
|
|
return; |
|
} |
|
|
|
sub ProcessDiscriminant { |
|
my ($List) = @_; |
|
my @sortedList = sort (@$List); |
|
my $Count = scalar @sortedList; |
|
my $Problem; |
|
my @Dis; |
|
my $Slvd=0; |
|
my $tmp; |
|
my $Sum1=0; |
|
my $Sum2=0; |
|
my $nIndex=0; |
|
my $nStudent=0; |
|
my %Proc=undef; |
|
while ($nIndex<$Count) { |
|
# $jr->print("<br> $nIndex) $sortedList[$nIndex]"); |
|
($Problem,$tmp)=split(/\=/,$sortedList[$nIndex]); |
|
@Dis=split(/\+/,$tmp); |
|
my $Temp = $Problem; |
|
do { |
|
$nIndex++; |
|
$nStudent++; |
|
$Sum1 += $Dis[0]; |
|
$Sum2 += $Dis[1]; |
|
($Problem,$tmp)=split(/\=/,$sortedList[$nIndex]); |
|
@Dis=split(/\+/,$tmp); |
|
} while ( $Problem eq $Temp && $nIndex < $Count ); |
|
$Proc{$Temp}=($Sum1/$nStudent).':'.($Sum2/$nStudent); |
|
# $jr->print("<br> $nIndex) $Temp --> ($nStudent) $Proc{$Temp}"); |
|
$Sum1=0; |
|
$Sum2=0; |
|
$nStudent=0; |
|
} |
|
|
|
return %Proc; |
|
} |
|
|
|
#------- Creating Discimination factor |
|
sub Discriminant { |
|
my ($discriminant)=@_; |
|
my @discriminantKeys=keys(%$discriminant); |
|
my $Count = scalar @discriminantKeys; |
|
|
|
my $UpCnt = int(0.27*$Count); |
|
my $low=0; |
|
my $up=$Count-$UpCnt; |
|
my @UpList=(); |
|
my @LowList=(); |
|
|
|
$Count=0; |
|
foreach my $key (sort(@discriminantKeys)) { |
|
$Count++; |
|
if($low < $UpCnt || $Count > $up) { |
|
$low++; |
|
my $str=$discriminant->{$key}; |
|
foreach(split(/\&/,$str)){ |
|
if($_) { |
|
if($low<$UpCnt) { push(@LowList,$_); } |
|
else { push(@UpList,$_); } |
|
} |
|
} |
|
} |
|
} |
|
my %DisUp = &ProcessDiscriminant(\@UpList); |
|
my %DisLow = &ProcessDiscriminant(\@LowList); |
|
|
|
return (\%DisUp, \%DisLow); |
|
} |
|
|
|
#---- END Problem Statistics Web Page ---------------------------------------- |
#---- END Problem Statistics Web Page ---------------------------------------- |
|
|
#---- Problem Statistics Graph Web Page -------------------------------------- |
|
|
|
# ------------------------------------------- Prepare data for Graphical chart |
|
|
|
sub BuildGraphicChart { |
|
my ($ylab,$r,$cacheDB)=@_; |
|
my %cache; |
|
my $Col; |
|
my $data=''; |
|
my $count = 0; |
|
my $Max = 0; |
|
|
|
unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) { |
|
return '<html><body>Unable to tie database.</body></html>'; |
|
} |
|
|
|
my $p_count = $cache{'ProblemCount'}; |
|
|
|
for ( my $k=0; $k<$p_count;$k++) { |
|
my @Temp=split(/\:/,$cache{'GraphGif:'.$k}); |
|
my $inf = $Temp[$Col]; |
|
if ( $Max < $inf ) {$Max = $inf;} |
|
$data .= $inf.','; |
|
$count++; |
|
} |
|
untie(%cache); |
|
# $r->print("<br>count=$p_count >>data= $data"); |
|
|
|
if ( $Max > 1 ) { |
|
$Max += (10 - $Max % 10); |
|
$Max = int($Max); |
|
} else { $Max = 1; } |
|
|
|
my $cid=$ENV{'request.course.id'}; |
|
|
|
if ( $ylab eq 'DoDiff Graph' ) { |
|
$ylab = 'Degree-of-Difficulty'; |
|
$Col = 0; |
|
} else { |
|
$ylab = 'Wrong-Percentage'; |
|
$Col = 1; |
|
} |
|
my $Course = $ENV{'course.'.$cid.'.description'}; |
|
$Course =~ s/\ /"_"/eg; |
|
my $GData=$Course.'&'.'Problems#'.'&'.$ylab.'&'. |
|
$Max.'&'.$count.'&'.$data; |
|
|
|
$r->print('<IMG src="/cgi-bin/graph.gif?'.$GData.'" />'); |
|
|
|
return; |
|
} |
|
|
|
1; |
1; |
__END__ |
__END__ |