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Don't need an array of colors if we use the defaults.

    1: # The LearningOnline Network with CAPA
    2: #
    3: # $Id: loncorrectproblemplot.pm,v 1.3 2004/02/02 21:52:28 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: 
   39: my @SubmitButtons = (
   40:                      { name => 'CreatePlot',
   41:                        text => 'Create Plot' },
   42:                      { name => 'ClearCache',
   43:                        text => 'Clear Caches' },
   44:                      { name => 'updatecaches',
   45:                        text => 'Update Student Data' },
   46:                      );
   47: 
   48: sub BuildCorrectProblemsPage {
   49:     my ($r,$c)=@_;
   50:     #
   51:     my %Saveable_Parameters = ('Status' => 'scalar',
   52:                                'Section' => 'array');
   53:     &Apache::loncommon::store_course_settings('correct_problems_plot',
   54:                                               \%Saveable_Parameters);
   55:     &Apache::loncommon::restore_course_settings('correct_problems_plot',
   56:                                                 \%Saveable_Parameters);
   57:     #
   58:     &Apache::lonstatistics::PrepareClasslist();    
   59:     #
   60:     $r->print('<h2>'.&mt('Number of Correct Problems Plot').'</h2>');
   61:     $r->print(&CreateInterface());
   62:     #
   63:     my @Students = @Apache::lonstatistics::Students;
   64:     #
   65:     if (@Students < 1) {
   66:         $r->print('<h2>'.
   67:                   &mt('There are no students in the sections selected').
   68:                   '</h2>');
   69:     }
   70:     #
   71:     &Apache::loncoursedata::clear_internal_caches();
   72:     if (exists($ENV{'form.ClearCache'}) || 
   73:         exists($ENV{'form.updatecaches'}) ||
   74:         (exists($ENV{'form.firstanalysis'}) &&
   75:          $ENV{'form.firstanalysis'} ne 'no')) {
   76:         &Apache::lonstatistics::Gather_Full_Student_Data($r);
   77:     }
   78:     if (! exists($ENV{'form.firstanalysis'})) {
   79:         $r->print('<input type="hidden" name="firstanalysis" value="yes" />');
   80:     } else {
   81:         $r->print('<input type="hidden" name="firstanalysis" value="no" />');
   82:     }
   83:     foreach my $button (@SubmitButtons) {
   84:         $r->print('<input type="submit" name="'.$button->{'name'}.'" '.
   85:                   'value="'.&mt($button->{'text'}).'" />');
   86:         $r->print('&nbsp;'x5);
   87:     }
   88:     $r->rflush();
   89:     #
   90:     # Determine which problem symbs we are to sum over
   91:     if (exists($ENV{'form.CreatePlot'})) {
   92:         my @ProblemSymbs;
   93:         if ($Apache::lonstatistics::SelectedMaps[0] ne 'all') {
   94:             foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()){
   95:                 foreach my $res (@{$seq->{'contents'}}) {
   96:                     next if ($res->{'type'} ne 'assessment');
   97:                     foreach my $part (@{$res->{'parts'}}) {
   98:                         push(@ProblemSymbs,{symb=>$res->{'symb'},
   99:                                             part=>$part});
  100:                     }
  101:                 }
  102:             }
  103:         }
  104:         my $score_data = &Apache::loncoursedata::get_student_scores
  105:             (\@Apache::lonstatistics::SelectedSections,
  106:              \@ProblemSymbs,
  107:              $Apache::lonstatistics::enrollment_status);
  108:         $r->print(&AnalyzeScoreData($score_data));
  109:     }
  110:     return;
  111: }
  112: 
  113: #########################################################
  114: #########################################################
  115: 
  116: =pod
  117: 
  118: =item & AnalyzeScoreData($score_data)
  119: 
  120: Analyze the result of &Apache::loncoursedata::get_student_scores() and
  121: return html with a plot of the data and a table of the values and bins.
  122: 
  123: =cut
  124: 
  125: #########################################################
  126: #########################################################
  127: sub AnalyzeScoreData {
  128:     my ($score_data) = @_;
  129:     #
  130:     # Basic check first
  131:     if (@$score_data < 1) {
  132:         return '<h2>There is no data to plot</h2>';
  133:     }
  134:     #
  135:     # Determine which bins to use
  136:     my $lowest  = $score_data->[0]->[0];
  137:     $lowest = 0;
  138:     my $highest = $score_data->[-1]->[0];
  139:     my $binsize = 1;
  140:     if ($highest > 50) { $binsize = 2; }
  141:     if ($highest > 100) { $binsize = 5; }
  142:     if ($highest > 200) { $binsize = 10; }
  143:     if ($highest > 500) { $binsize = 20; }
  144:     if ($highest > 1000) { $binsize = 50; }
  145:     if ($highest > 2000) { $binsize = 100; }
  146:     #
  147:     # Get the data into the bins (destroying $score_data in the process)
  148:     my @Bins = &bin_data($score_data,$binsize,$lowest,$highest);
  149:     my @Xdata; my @Ydata; my $max;
  150:     my $Str = '<table border="1">'."\n".'<tr><th>Range</th><th>Count</th></tr>'."\n";
  151:     while (my $bin = shift(@Bins)) {
  152:         push (@Xdata,$bin->{'start'});
  153:         push (@Ydata,$bin->{'count'});
  154:         if ($bin->{'count'} > $max) {
  155:             $max = $bin->{'count'};
  156:         }
  157:         $Str.= '<tr><td>'.$bin->{'start'}.' - '.$bin->{'end'}.'</td>'.
  158:             '<td>'.$bin->{'count'}.'</td></tr>'."\n";
  159:     }
  160:     my $title = '';
  161:     $Str .= "</table><br />\n";
  162:     $Str = "<br />\n".&Apache::loncommon::DrawBarGraph($title,
  163:                                                        'Num Correct Problems',
  164:                                                        'Number of students',
  165:                                                        $max,
  166:                                                        undef, # colors
  167:                                                        \@Xdata,
  168:                                                        \@Ydata).
  169:                                                            "\n<br />\n".$Str;
  170:     return $Str;                                               
  171: }
  172: 
  173: 
  174: #########################################################
  175: #########################################################
  176: 
  177: =pod
  178: 
  179: =item &bin_data($data,$binsize,$startbin,$endbin)
  180: 
  181: Note: This routine destroys the array of data passed to it.
  182: 
  183: Inputs: $data: array reference - the contents of @$data must
  184:         be arrays with x and y data.  $data = [ [x1,y1],[x2,y2],...];
  185:         $binsize: Width of bins to put data in
  186:         $startbin: the starting bin.
  187:         $endbin: the ending bin.
  188: Returns: Array of Bins.  Each bin is a hash reference with the following
  189:          keys: 'start', 'count', and 'end'.
  190: 
  191: =cut
  192: 
  193: #########################################################
  194: #########################################################
  195: sub bin_data {
  196:     my ($data,$binsize,$startbin,$endbin)=@_;
  197:     return () if (! defined($data) || ref($data) ne 'ARRAY');
  198:     #
  199:     # Determine bin geometry
  200:     my $binstart = $startbin;
  201:     my $binend = $startbin+$binsize;
  202:     # put the data into bins
  203:     my @Bins;
  204:     my $count=0;
  205:     my $idx=0;
  206:     while ($idx < scalar(@$data) && ($binend-$endbin)<$binsize) {
  207:         my $dataset = $data->[$idx++];
  208:         my ($x,$y) = @{$dataset};
  209:         while ($x > $binend) {
  210:             # store the old data
  211:             push (@Bins,{ start => $binstart,
  212:                           count => $count,
  213:                           end   => $binend });
  214:             # start counting again
  215:             $binstart += $binsize;
  216:             $binend += $binsize;
  217:             $count = 0;
  218:         }
  219:         $count+=$y;
  220:     }
  221:     return @Bins;
  222: }
  223: 
  224: #########################################################
  225: #########################################################
  226: 
  227: =pod
  228: 
  229: =item &CreateInterface
  230: 
  231: Inputs: none.
  232: 
  233: Returns: HTML for the correct problems plot interface.
  234: 
  235: =cut
  236: 
  237: #########################################################
  238: #########################################################
  239: sub CreateInterface {
  240:     ##
  241:     ## Environment variable initialization
  242:     my $Str;
  243:     $Str .= '<table cellspacing="5">'."\n";
  244:     $Str .= '<tr>';
  245:     $Str .= '<td align="center"><b>'.&mt('Sections').'</b></td>';
  246:     $Str .= '<td align="center"><b>'.&mt('Enrollment Status').'</b></td>';
  247:     $Str .= '<td align="center"><b>'.&mt('Sequences and Folders').'</b></td>';
  248:     $Str .= '</tr>'."\n";
  249:     ##
  250:     ## 
  251:     $Str .= '<tr><td align="center">'."\n";
  252:     $Str .= &Apache::lonstatistics::SectionSelect('Section','multiple',5);
  253:     $Str .= '</td>';
  254:     #
  255:     $Str .= '<td align="center">';
  256:     $Str .= &Apache::lonhtmlcommon::StatusOptions(undef,undef,5);
  257:     $Str .= '</td><td>'."\n";
  258:     #
  259:     my $only_seq_with_assessments = sub { 
  260:         my $s=shift;
  261:         if ($s->{'num_assess'} < 1) { 
  262:             return 0;
  263:         } else { 
  264:             return 1;
  265:         }
  266:     };
  267:     $Str .= &Apache::lonstatistics::MapSelect('Maps','multiple,all',5,
  268:                                               $only_seq_with_assessments);
  269:     $Str .= '</td><td>'."\n";
  270:     ##
  271:     $Str .= '</tr>'."\n";
  272:     $Str .= '</table>'."\n";
  273:     return $Str;
  274: }
  275: 
  276: 1;
  277: 
  278: __END__