Return to loncorrectproblemplot.pm CVS log

Up to [LON-CAPA] / loncom / interface / statistics

Added: loncorrectproblems plot: produce a histogram of the number of students
having N problems correct.
loncoursedata: Modified &get_student_scores to accept enrollment status and
section as inputs.  No longer works at a student level.  At worst the
SQL queries generated are cleaner, at best the queries run faster.
lonstatistics: Modified to export the selected enrollment status.
    Added the correct problems plot to the statistics menu.

    1: # The LearningOnline Network with CAPA
    2: #
    3: # $Id: loncorrectproblemplot.pm,v 1.1 2004/02/02 21:45:12 matthew Exp $
    4: #
    5: # Copyright Michigan State University Board of Trustees
    6: #
    7: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
    8: #
    9: # LON-CAPA is free software; you can redistribute it and/or modify
   10: # it under the terms of the GNU General Public License as published by
   11: # the Free Software Foundation; either version 2 of the License, or
   12: # (at your option) any later version.
   13: #
   14: # LON-CAPA is distributed in the hope that it will be useful,
   15: # but WITHOUT ANY WARRANTY; without even the implied warranty of
   16: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   17: # GNU General Public License for more details.
   18: #
   19: # You should have received a copy of the GNU General Public License
   20: # along with LON-CAPA; if not, write to the Free Software
   21: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   22: #
   23: # /home/httpd/html/adm/gpl.txt
   24: #
   25: # http://www.lon-capa.org/
   26: #
   27: 
   28: package Apache::loncorrectproblemplot;
   29: 
   30: use strict;
   31: use Apache::lonnet();
   32: use Apache::loncommon();
   33: use Apache::lonhtmlcommon();
   34: use Apache::loncoursedata();
   35: use Apache::lonstatistics;
   36: use Apache::lonstathelpers;
   37: use Apache::lonlocal;
   38: use HTML::Entities();
   39: use Time::Local();
   40: use Spreadsheet::WriteExcel();
   41: 
   42: my $plotcolors = ['#33ff00', 
   43:                   '#ff33cc', '#990000', '#aaaa66', '#663399', '#ff9933',
   44:                   '#66ccff', '#ff9999', '#cccc33', '#660000', '#33cc66',
   45:                   ]; 
   46: 
   47: my @SubmitButtons = (
   48:                      { name => 'CreatePlot',
   49:                        text => 'Create Plot' },
   50:                      { name => 'ClearCache',
   51:                        text => 'Clear Caches' },
   52:                      { name => 'updatecaches',
   53:                        text => 'Update Student Data' },
   54:                      );
   55: 
   56: sub BuildCorrectProblemsPage {
   57:     my ($r,$c)=@_;
   58:     #
   59:     my %Saveable_Parameters = ('Status' => 'scalar',
   60:                                'Section' => 'array');
   61:     &Apache::loncommon::store_course_settings('correct_problems_plot',
   62:                                               \%Saveable_Parameters);
   63:     &Apache::loncommon::restore_course_settings('correct_problems_plot',
   64:                                                 \%Saveable_Parameters);
   65:     #
   66:     &Apache::lonstatistics::PrepareClasslist();    
   67:     #
   68:     $r->print('<h2>'.&mt('Number of Correct Problems Plot').'</h2>');
   69:     $r->print(&CreateInterface());
   70:     #
   71:     my @Students = @Apache::lonstatistics::Students;
   72:     #
   73:     if (@Students < 1) {
   74:         $r->print('<h2>'.
   75:                   &mt('There are no students in the sections selected').
   76:                   '</h2>');
   77:     }
   78:     #
   79:     &Apache::loncoursedata::clear_internal_caches();
   80:     if (exists($ENV{'form.ClearCache'}) || 
   81:         exists($ENV{'form.updatecaches'}) ||
   82:         (exists($ENV{'form.firstanalysis'}) &&
   83:          $ENV{'form.firstanalysis'} ne 'no')) {
   84:         &Apache::lonstatistics::Gather_Full_Student_Data($r);
   85:     }
   86:     if (! exists($ENV{'form.firstanalysis'})) {
   87:         $r->print('<input type="hidden" name="firstanalysis" value="yes" />');
   88:     } else {
   89:         $r->print('<input type="hidden" name="firstanalysis" value="no" />');
   90:     }
   91:     foreach my $button (@SubmitButtons) {
   92:         $r->print('<input type="submit" name="'.$button->{'name'}.'" '.
   93:                   'value="'.&mt($button->{'text'}).'" />');
   94:         $r->print('&nbsp;'x5);
   95:     }
   96:     $r->rflush();
   97:     #
   98:     # Determine which problem symbs we are to sum over
   99:     if (exists($ENV{'form.CreatePlot'})) {
  100:         my @ProblemSymbs;
  101:         if ($Apache::lonstatistics::SelectedMaps[0] ne 'all') {
  102:             foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()){
  103:                 foreach my $res (@{$seq->{'contents'}}) {
  104:                     next if ($res->{'type'} ne 'assessment');
  105:                     foreach my $part (@{$res->{'parts'}}) {
  106:                         push(@ProblemSymbs,{symb=>$res->{'symb'},
  107:                                             part=>$part});
  108:                     }
  109:                 }
  110:             }
  111:         }
  112:         my $score_data = &Apache::loncoursedata::get_student_scores
  113:             (\@Apache::lonstatistics::SelectedSections,
  114:              \@ProblemSymbs,
  115:              $Apache::lonstatistics::enrollment_status);
  116:         $r->print(&AnalyzeScoreData($score_data));
  117:     }
  118:     return;
  119: }
  120: 
  121: #########################################################
  122: #########################################################
  123: 
  124: =pod
  125: 
  126: =item 
  127: 
  128: =cut
  129: 
  130: #########################################################
  131: #########################################################
  132: sub AnalyzeScoreData {
  133:     my ($score_data) = @_;
  134:     #
  135:     # Basic check first
  136:     if (@$score_data < 1) {
  137:         return '<h2>There is no data to plot</h2>';
  138:     }
  139:     #
  140:     # Determine which bins to use
  141:     my $lowest  = $score_data->[0]->[0];
  142:     $lowest = 0;
  143:     my $highest = $score_data->[-1]->[0];
  144:     my $binsize = 1;
  145:     if ($highest > 50) { $binsize = 2; }
  146:     if ($highest > 100) { $binsize = 5; }
  147:     if ($highest > 200) { $binsize = 10; }
  148:     if ($highest > 500) { $binsize = 20; }
  149:     if ($highest > 1000) { $binsize = 50; }
  150:     if ($highest > 2000) { $binsize = 100; }
  151:     #
  152:     # Get the data into the bins (destroying $score_data in the process)
  153:     my @Bins = &bin_data($score_data,$binsize,$lowest,$highest);
  154:     my @Xdata; my @Ydata; my $max;
  155:     my $Str = '<table border="1">'."\n".'<tr><th>Range</th><th>Count</th></tr>'."\n";
  156:     while (my $bin = shift(@Bins)) {
  157:         push (@Xdata,$bin->{'start'});
  158:         push (@Ydata,$bin->{'count'});
  159:         if ($bin->{'count'} > $max) {
  160:             $max = $bin->{'count'};
  161:         }
  162:         $Str.= '<tr><td>'.$bin->{'start'}.' - '.$bin->{'end'}.'</td>'.
  163:             '<td>'.$bin->{'count'}.'</td></tr>'."\n";
  164:     }
  165:     my $title = '';
  166:     $Str .= "</table><br />\n";
  167:     $Str = "<br />\n".&Apache::loncommon::DrawBarGraph($title,
  168:                                                        'Num Correct Problems',
  169:                                                        'Number of students',
  170:                                                        $max,
  171:                                                        undef, # colors
  172:                                                        \@Xdata,
  173:                                                        \@Ydata).
  174:                                                            "\n<br />\n".$Str;
  175:     return $Str;                                               
  176: }
  177: 
  178: 
  179: #########################################################
  180: #########################################################
  181: 
  182: =pod
  183: 
  184: =item &bin_data($data,$binsize,$startbin,$endbin)
  185: 
  186: Note: This routine destroys the array of data passed to it.
  187: 
  188: Inputs: $data: array reference - the contents of @$data must
  189:         be arrays with x and y data.  $data = [ [x1,y1],[x2,y2],...];
  190:         $binsize: Width of bins to put data in
  191:         $startbin: the starting bin.
  192:         $endbin: the ending bin.
  193: Returns: Array of Bins.  Each bin is a hash reference with the following
  194:          keys: 'start', 'count', and 'end'.
  195: 
  196: =cut
  197: 
  198: #########################################################
  199: #########################################################
  200: sub bin_data {
  201:     my ($data,$binsize,$startbin,$endbin)=@_;
  202:     return () if (! defined($data) || ref($data) ne 'ARRAY');
  203:     #
  204:     # Determine bin geometry
  205:     my $binstart = $startbin;
  206:     my $binend = $startbin+$binsize;
  207:     # put the data into bins
  208:     my @Bins;
  209:     my $count=0;
  210:     my $idx=0;
  211:     while ($idx < scalar(@$data) && ($binend-$endbin)<$binsize) {
  212:         my $dataset = $data->[$idx++];
  213:         my ($x,$y) = @{$dataset};
  214:         while ($x > $binend) {
  215:             # store the old data
  216:             push (@Bins,{ start => $binstart,
  217:                           count => $count,
  218:                           end   => $binend });
  219:             # start counting again
  220:             $binstart += $binsize;
  221:             $binend += $binsize;
  222:             $count = 0;
  223:         }
  224:         $count+=$y;
  225:     }
  226:     return @Bins;
  227: }
  228: 
  229: #########################################################
  230: #########################################################
  231: 
  232: =pod
  233: 
  234: =item 
  235: 
  236: =cut
  237: 
  238: #########################################################
  239: #########################################################
  240: sub CreateInterface {
  241:     ##
  242:     ## Environment variable initialization
  243:     my $Str;
  244:     $Str .= '<table cellspacing="5">'."\n";
  245:     $Str .= '<tr>';
  246:     $Str .= '<td align="center"><b>'.&mt('Sections').'</b></td>';
  247:     $Str .= '<td align="center"><b>'.&mt('Enrollment Status').'</b></td>';
  248:     $Str .= '<td align="center"><b>'.&mt('Sequences and Folders').'</b></td>';
  249:     $Str .= '</tr>'."\n";
  250:     ##
  251:     ## 
  252:     $Str .= '<tr><td align="center">'."\n";
  253:     $Str .= &Apache::lonstatistics::SectionSelect('Section','multiple',5);
  254:     $Str .= '</td>';
  255:     #
  256:     $Str .= '<td align="center">';
  257:     $Str .= &Apache::lonhtmlcommon::StatusOptions(undef,undef,5);
  258:     $Str .= '</td><td>'."\n";
  259:     #
  260:     my $only_seq_with_assessments = sub { 
  261:         my $s=shift;
  262:         if ($s->{'num_assess'} < 1) { 
  263:             return 0;
  264:         } else { 
  265:             return 1;
  266:         }
  267:     };
  268:     $Str .= &Apache::lonstatistics::MapSelect('Maps','multiple,all',5,
  269:                                               $only_seq_with_assessments);
  270:     $Str .= '</td><td>'."\n";
  271:     ##
  272:     $Str .= '</tr>'."\n";
  273:     $Str .= '</table>'."\n";
  274:     return $Str;
  275: }
  276: 
  277: 1;
  278: 
  279: __END__