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Diff for /loncom/interface/statistics/lonproblemanalysis.pm between versions 1.112 and 1.113

version 1.112, 2005/02/22 04:32:46 version 1.113, 2005/02/22 05:28:21
Line 303  sub numerical_plot_percent { Line 303  sub numerical_plot_percent {
     #      #
     my $total = $stats->{'submission_count'};      my $total = $stats->{'submission_count'};
     return '' if ($total == 0);      return '' if ($total == 0);
     my $min_bin_size = $stats->{'min_abs'};      my $min_bin_size = $stats->{'min_percent'};
     my $low_bin  = $stats->{'lowest_ans'}-$stats->{'max_bin_size'};      my $low_bin  = $stats->{'lowest_ans'}-$stats->{'max_bin_size'};
     my $high_bin = $stats->{'highest_ans'}+$stats->{'max_bin_size'};      my $high_bin = $stats->{'highest_ans'}+$stats->{'max_bin_size'};
       if ($high_bin > 0 && $low_bin > -$high_bin) {
           $low_bin = -$high_bin;
       } elsif ($low_bin < 0 && $high_bin < -$low_bin) {
           $high_bin = -$low_bin;
       }
       if (($high_bin -$low_bin)/$min_bin_size > 1000) {
           $min_bin_size = abs($high_bin - $low_bin) / 1000;
       }
     my @bins;      my @bins;
     for (my $num = $low_bin;$num <= $high_bin;$num+=($min_bin_size/2)) {      for (my $num = $low_bin;$num <= $high_bin;$num+=($min_bin_size/2)) {
         push(@bins,$num);          push(@bins,$num);
Line 317  sub numerical_plot_percent { Line 325  sub numerical_plot_percent {
     while (my ($ans,$submissions) = each(%$responses)) {      while (my ($ans,$submissions) = each(%$responses)) {
         while (my ($submission,$counts) = each(%$submissions)) {          while (my ($submission,$counts) = each(%$submissions)) {
             my ($correct_count,$incorrect_count) = @$counts;              my ($correct_count,$incorrect_count) = @$counts;
             my $scaled_value = abs(($submission-$ans)/$ans);              my $scaled_value = ($submission-$ans)/$ans;
             my $bin=0;              my $bin=0;
             for ($bin=0;$bin<$#bins;$bin++) { # not <= for a reason              for ($bin=0;$bin<$#bins;$bin++) { # not <= for a reason
                 last if ($bins[$bin]>$scaled_value);                  last if ($bins[$bin]>$scaled_value);
Line 352  sub numerical_plot_percent { Line 360  sub numerical_plot_percent {
         $plot_incorrect[$i] *= 100/$total;          $plot_incorrect[$i] *= 100/$total;
     }      }
     #      #
     my $title = &mt('Distribution by Percent');      my $title = &mt('Percent Difference');
     my @labels = (1..scalar(@bins));      my @labels = (1..scalar(@bins));
     my $graph = &Apache::loncommon::DrawBarGraph      my $graph = &Apache::loncommon::DrawBarGraph
         ($title,'Percent difference from correct','Number of answers',          ($title,'Percent difference from correct','Number of answers',
Line 369  sub numerical_plot_differences { Line 377  sub numerical_plot_differences {
     #      #
     my $total = $stats->{'submission_count'};      my $total = $stats->{'submission_count'};
     return '' if ($total == 0);      return '' if ($total == 0);
     #      my $max_bins = 50;
       my $min_bin_size = $stats->{'min_abs'};
       my $low_bin  = $stats->{'lowest_ans'}-$stats->{'max_bin_size'};
       my $high_bin = $stats->{'highest_ans'}+$stats->{'max_bin_size'};
       if ($high_bin > 0 && $low_bin > -$high_bin) {
           $low_bin = -$high_bin;
       } elsif ($low_bin < 0 && $high_bin < -$low_bin) {
           $high_bin = -$low_bin;
       }
       if (($high_bin -$low_bin)/$min_bin_size * 2 > $max_bins) {
           $min_bin_size = abs($high_bin - $low_bin) / $max_bins * 2;
       }
     my @bins;      my @bins;
     my @labels;      for (my $num = $low_bin;$num <= $high_bin;$num+=($min_bin_size/2)) {
     # Hmmmm, should switch to absolute difference          push(@bins,$num);
     for (my $i=1;$i<=20;$i++) {  
         push(@bins,$i/2);  
         push(@labels,$i);  
     }      }
     #      #
     my @correct;      my @correct;
     my @incorrect;      my @incorrect;
     my @count;      my @count;
     while (my ($ans,$submissions) = each(%$responses)) {      while (my ($ans,$submissions) = each(%$responses)) {
         next if ($ans =~ /^_/);  
         while (my ($submission,$counts) = each(%$submissions)) {          while (my ($submission,$counts) = each(%$submissions)) {
             my ($correct_count,$incorrect_count) = @$counts;              my ($correct_count,$incorrect_count) = @$counts;
             my $value = abs($submission-$ans);              my $scaled_value = $submission-$ans;
             my $bin=0;              my $bin=0;
             for ($bin=0;$bin<$#bins;$bin++) { # not <= for a reason              for ($bin=0;$bin<$#bins;$bin++) { # not <= for a reason
                 last if ($bins[$bin]>$value);                  last if ($bins[$bin]>$scaled_value);
             }              }
             $correct[$bin]+=$correct_count;              $correct[$bin]+=$correct_count;
             $incorrect[$bin]+=$incorrect_count;              $incorrect[$bin]+=$incorrect_count;
             $count[$bin]+=$correct_count+$incorrect_count;              $count[$bin]+=$correct_count+$incorrect_count;
         }          }
     }      }
     #      my @plot_correct   = @correct;
     my @plot_correct;      my @plot_incorrect = @incorrect;
     my @plot_incorrect;  
     for (my $i=0;$i<=$#bins;$i++) {      for (my $i=0;$i<=$#bins;$i++) {
         $plot_correct[$i]   =   $correct[$i]*100/$total;          $plot_correct[$i]   *= 100/$total;
         $plot_incorrect[$i] = $incorrect[$i]*100/$total;          $plot_incorrect[$i] *= 100/$total;
     }      }
     my $title = &mt('Distribution by Magnitude');      #
       my $title = &mt('Difference between submission and correct');
       my @labels = (1..scalar(@bins));
     my $graph = &Apache::loncommon::DrawBarGraph      my $graph = &Apache::loncommon::DrawBarGraph
         ($title,'magnitude difference from correct','Number of answers',          ($title,'Difference from Correct','Number of answers',
          100,['#33FF00','#FF3300'],\@labels,\@plot_correct,\@plot_incorrect,           100,['#33FF00','#FF3300'],\@labels,\@plot_correct,\@plot_incorrect,
          {xskip=>1});           {xskip=>1});
     #      #
Line 528  sub numerical_bin_table { Line 544  sub numerical_bin_table {
         '<th>'.&mt('Correct').'</th>'.          '<th>'.&mt('Correct').'</th>'.
         '<th>'.&mt('Count').'</th>'.          '<th>'.&mt('Count').'</th>'.
         '</tr>'.$/;          '</tr>'.$/;
     for (my $i=0;$i<scalar(@{$bins});$i++) {      for (my $i=0;$i<scalar(@{$bins}-1);$i++) {
         my $lownum;          my $lownum = $bins->[$i];
         if ($i == 0) {          my $highnum = $bins->[$i+1];
             $lownum = 0;  
         } else {  
             $lownum = $bins->[$i-1];  
         }  
         my $highnum = $bins->[$i];  
         $table .=           $table .= 
             '<tr>'.              '<tr>'.
             '<td>'.$labels->[$i].'</td>'.              '<td>'.$labels->[$i].'</td>'.
Removed from v.1.112  
changed lines
  Added in v.1.113

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