--- loncom/interface/statistics/lonsubmissiontimeanalysis.pm	2005/03/04 20:34:15	1.19
+++ loncom/interface/statistics/lonsubmissiontimeanalysis.pm	2005/04/07 06:56:24	1.23
@@ -1,6 +1,6 @@
 # The LearningOnline Network with CAPA
 #
-# $Id: lonsubmissiontimeanalysis.pm,v 1.19 2005/03/04 20:34:15 matthew Exp $
+# $Id: lonsubmissiontimeanalysis.pm,v 1.23 2005/04/07 06:56:24 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -28,7 +28,7 @@
 package Apache::lonsubmissiontimeanalysis;
 
 use strict;
-use Apache::lonnet();
+use Apache::lonnet;
 use Apache::loncommon();
 use Apache::lonhtmlcommon();
 use Apache::loncoursedata();
@@ -37,7 +37,6 @@ use Apache::lonstathelpers;
 use Apache::lonlocal;
 use HTML::Entities();
 use Time::Local();
-use Spreadsheet::WriteExcel();
 
 my $plotcolors = ['#33ff00', 
                   '#ff33cc', '#990000', '#aaaa66', '#663399', '#ff9933',
@@ -79,8 +78,8 @@ sub BuildSubmissionTimePage {
         &Apache::lonstathelpers::manage_caches($r,'Statistics','stats_status');
     $r->rflush();
     #
-    if (! exists($ENV{'form.problemchoice'}) ||
-        exists($ENV{'form.SelectAnother'})) {
+    if (! exists($env{'form.problemchoice'}) ||
+        exists($env{'form.SelectAnother'})) {
         $r->print('<input type="submit" name="" value="'.
                   &mt('Graph Problem Submission Times').'" />');
         $r->print('&nbsp;'x5);
@@ -99,25 +98,25 @@ sub BuildSubmissionTimePage {
         #
         # Determine which problem we are to analyze
         my $current_problem = &Apache::lonstathelpers::get_target_from_id
-            ($ENV{'form.problemchoice'});
+            ($env{'form.problemchoice'});
         #
         my ($navmap,$prev,$curr,$next) = 
             &Apache::lonstathelpers::get_prev_curr_next($current_problem,
                                                         '.',
                                                         'part');
-        if (exists($ENV{'form.PrevProblemAnalysis'}) && defined($prev)) {
+        if (exists($env{'form.PrevProblemAnalysis'}) && defined($prev)) {
             $current_problem = $prev;
-        } elsif (exists($ENV{'form.NextProblemAnalysis'}) && defined($next)) {
+        } elsif (exists($env{'form.NextProblemAnalysis'}) && defined($next)) {
             $current_problem = $next;
         } else {
             $current_problem = $curr;
         }
         #
         # Store the current problem choice and send it out in the form
-        $ENV{'form.problemchoice'} = 
+        $env{'form.problemchoice'} = 
             &Apache::lonstathelpers::make_target_id($current_problem);
         $r->print('<input type="hidden" name="problemchoice" value="'.
-                  $ENV{'form.problemchoice'}.'" />');
+                  $env{'form.problemchoice'}.'" />');
         #
         $r->print('<hr />');
         $r->rflush();
@@ -128,6 +127,9 @@ sub BuildSubmissionTimePage {
         } else {
             $r->print('<h1>'.$resource->compTitle.'</h1>');
             $r->print('<h3>'.$resource->src.'</h3>');
+            $r->print('<h4>'.
+                 &Apache::lonstatistics::section_and_enrollment_description().
+                      '</h4>');
             $r->rflush();
             $r->print(&Apache::lonstathelpers::render_resource($resource));
             $r->print('<br />');
@@ -170,7 +172,7 @@ sub analyze_times {
     my $html; # holds results of analysis
     # Get the data
     my $SubData = &Apache::loncoursedata::get_response_time_data
-        (\@Apache::lonstatistics::SelectedSections,
+        ([&Apache::lonstatistics::get_selected_sections()],
          $Apache::lonstatistics::enrollment_status,
          $symb,$part);
     if (! defined($SubData) || ! ref($SubData)) {
@@ -264,21 +266,27 @@ sub analyze_times {
         '<th valign="bottom">'.&mt('Begin').'</th>'.
         '<th>'.('&nbsp;'x3).'</th>'.
         '<th valign="bottom">'.&mt('End').'</th>'.
-        '<th valign="bottom">'.&mt('Submissions').'</th>'.
+        '<th valign="bottom">'.&mt('Submissions (plotted)').'</th>'.
         '<th>'.('&nbsp;'x3).'</th>'.
-        '<th valign="bottom">'.&mt('Correct Submissions').'</th>'.
+        '<th valign="bottom">'.&mt('Correct Submissions (not plotted)').'</th>'.
         '<th>'.('&nbsp;'x3).'</th>'.
-        '<th valign="bottom">'.&mt('Cumulative Correct of those attempting the problem').'</th>'.
+        '<th valign="bottom">'.&mt('Cumulative Correct of those attempting the problem (not plotted)').'</th>'.
         '<th>'.('&nbsp;'x3).'</th>'.
-        '<th valign="bottom">'.&mt('Cumulative Percent Correct of those attempting the problem').'</th>'.
+        '<th valign="bottom">'.&mt('Cumulative Percent Correct of those attempting the problem (not plotted)').'</th>'.
+        '<th>'.('&nbsp;'x3).'</th>'.
+        '<th valign="bottom">'.&mt('Cumulative Percent Correct of selected students (plotted)').'</th>'.
         '</tr>'.
         '</thead>'.
         '<tbody>';
     my @CumulativeCorrect=(0);
-    my @CumulativeCorrectPercent;
+    my @corr_as_percent_of_selected;
+    my @corr_as_percent_of_answering;
     for (my $i=0;$i<=$#Ydata;$i++) {
         $CumulativeCorrect[$i]=$CumulativeCorrect[-1]+$AnsData[$i];
-        $CumulativeCorrectPercent[$i] = sprintf('%3.1f',100*$CumulativeCorrect[$i]/$numstudents);
+        $corr_as_percent_of_answering[$i] = 
+            sprintf('%3.1f',100*$CumulativeCorrect[$i]/$numstudents);
+        $corr_as_percent_of_selected[$i] = 
+            sprintf('%3.1f',100*$CumulativeCorrect[$i]/scalar(@$students));
         if ($Ydata[$i] != 0) {
             next if (! defined($BinEnd[$i]) || $BinEnd[$i] == 0);
             $htmltable .= 
@@ -296,7 +304,9 @@ sub analyze_times {
                 '<td>&nbsp;</td>'.
                 '<td align="right">'.$CumulativeCorrect[$i].'</td>'.
                 '<td>&nbsp;</td>'.
-                '<td align="right">'.$CumulativeCorrectPercent[$i].'</td>'.
+                '<td align="right">'.$corr_as_percent_of_answering[$i].'</td>'.
+                '<td>&nbsp;</td>'.
+                '<td align="right">'.$corr_as_percent_of_selected[$i].'</td>'.
                 '</tr>'.$/;
         }
     }
@@ -322,7 +332,7 @@ sub analyze_times {
                                               $plotcolors,
                                               \@Xlabel,
                                               \@Ydata,0,$max,
-                                              \@CumulativeCorrectPercent,0,100,
+                                              \@corr_as_percent_of_selected,0,100,
                                               (xskip => $bins_per_day,
                                                x_ticks => $bins_per_day,
                                                x_tick_offset => $bins_per_day,
@@ -378,8 +388,8 @@ sub Process_Row {
 sub CreateInterface {
     ##
     ## Environment variable initialization
-    if (! exists$ENV{'form.AnalyzeOver'}) {
-        $ENV{'form.AnalyzeOver'} = 'Tries';
+    if (! exists$env{'form.AnalyzeOver'}) {
+        $env{'form.AnalyzeOver'} = 'Tries';
     }
     ##
     ## Build the menu