--- loncom/interface/statistics/lonproblemanalysis.pm	2005/02/22 05:28:21	1.113
+++ loncom/interface/statistics/lonproblemanalysis.pm	2013/12/30 14:19:58	1.142.2.3
@@ -1,6 +1,6 @@
 # The LearningOnline Network with CAPA
 #
-# $Id: lonproblemanalysis.pm,v 1.113 2005/02/22 05:28:21 matthew Exp $
+# $Id: lonproblemanalysis.pm,v 1.142.2.3 2013/12/30 14:19:58 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -27,7 +27,7 @@
 package Apache::lonproblemanalysis;
 
 use strict;
-use Apache::lonnet();
+use Apache::lonnet;
 use Apache::loncommon();
 use Apache::lonhtmlcommon();
 use Apache::loncoursedata();
@@ -38,6 +38,9 @@ use Apache::lonstudentsubmissions();
 use HTML::Entities();
 use Time::Local();
 use capa;
+use lib '/home/httpd/lib/perl/';
+use LONCAPA;
+  
 
 my $plotcolors = ['#33ff00', 
                   '#0033cc', '#990000', '#aaaa66', '#663399', '#ff9933',
@@ -59,6 +62,7 @@ sub BuildProblemAnalysisPage {
     #
     my %Saveable_Parameters = ('Status' => 'scalar',
                                'Section' => 'array',
+                               'Groups' => 'array',
                                'NumPlots' => 'scalar',
                                'AnalyzeOver' => 'scalar',
                                );
@@ -69,12 +73,17 @@ sub BuildProblemAnalysisPage {
     #
     &Apache::lonstatistics::PrepareClasslist();
     #
+    $r->print(&Apache::lonhtmlcommon::breadcrumbs('Detailed Problem Analysis'));
+
     $r->print(&CreateInterface());
     #
     my @Students = @Apache::lonstatistics::Students;
     #
-    if (@Students < 1 && exists($ENV{'form.firstrun'})) {
-        $r->print('<h2>There are no students in the sections selected</h2>');
+    if (@Students < 1 && exists($env{'form.firstrun'})) {
+        $r->print('<div class="LC_warning">'
+                 .&mt('There are no students in the sections/groups selected.')
+                 .'</div>'
+        );
     }
     #
     my @CacheButtonHTML = 
@@ -82,8 +91,8 @@ sub BuildProblemAnalysisPage {
     $r->rflush();
     #
     my $problem_types = '(option|radiobutton|numerical)';
-    if (exists($ENV{'form.problemchoice'}) && 
-        ! exists($ENV{'form.SelectAnother'})) {
+    if (exists($env{'form.problemchoice'}) && 
+        ! exists($env{'form.SelectAnother'})) {
         foreach my $button (@SubmitButtons) {
             if ($button->{'name'} eq 'break') {
                 $r->print("<br />\n");
@@ -97,70 +106,88 @@ sub BuildProblemAnalysisPage {
             $r->print($html.('&nbsp;'x5));
         }
         #
+
+        # This is commented out pending actual implementation of 
+        # CSV and Excel output.
+        #$r->print(&Apache::lonstathelpers::submission_report_form
+        #                                              ('problem_analysis'));
+        #
         $r->print('<hr />');
         $r->rflush();
         #
         # Determine which problem we are to analyze
         my $current_problem = &Apache::lonstathelpers::get_target_from_id
-            ($ENV{'form.problemchoice'});
+            ($env{'form.problemchoice'});
         #
-        my ($prev,$curr,$next) = 
+        my ($navmap,$prev,$curr,$next) = 
             &Apache::lonstathelpers::get_prev_curr_next($current_problem,
                                                         $problem_types,
                                                         'response',
                                                         );
-        if (exists($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'}.'" />');
+                  $env{'form.problemchoice'}.'" />');
         #
         if (! defined($current_problem->{'resource'})) {
             $r->print('resource is undefined');
         } else {
             my $resource = $current_problem->{'resource'};
-            $r->print('<h1>'.$resource->{'title'}.'</h1>');
-            $r->print('<h3>'.$resource->{'src'}.'</h3>');
-            if ($ENV{'form.show_prob'} eq 'true') {
-                $r->print(&Apache::lonstathelpers::render_resource($resource));
+            $r->print('<h1>'.$resource->compTitle.'</h1>');
+            $r->print('<h3>'.$resource->src.'</h3>');
+            $r->print('<p>'.&Apache::lonstatistics::section_and_enrollment_description().'</p>');
+            if ($env{'form.show_prob'} eq 'true') {
+                $r->print('<hr />'
+                         .&Apache::lonstathelpers::render_resource($resource)
+                         .'<hr />'
+                );
             }
             $r->rflush();
-            my %Data = &Apache::lonstathelpers::get_problem_data
-                ($resource->{'src'});
-            my $problem_data = $Data{$current_problem->{'part'}.
-                                    '.'.
-                                    $current_problem->{'respid'}};
-            if ($current_problem->{'resptype'} eq 'option') {
-                &OptionResponseAnalysis($r,$current_problem,
-                                        $problem_data,
-                                        \@Students);
-            } elsif ($current_problem->{'resptype'} eq 'radiobutton') {
-                &radio_response_analysis($r,$current_problem,
-                                         $problem_data,
-                                         \@Students);
-            } elsif ($current_problem->{'resptype'} eq 'numerical') {
-                &numerical_response_analysis($r,$current_problem,
-                                             $problem_data,\@Students);
-            } else {
-                $r->print('<h2>Analysis of '.$current_problem->{'resptype'}.' is not supported</h2>');
-            }
+	    if (@Students) {
+		my %Data = &Apache::lonstathelpers::get_problem_data
+		    ($resource->src);
+		my $problem_data = $Data{$current_problem->{'part'}.
+					     '.'.
+					     $current_problem->{'respid'}};
+		if ($current_problem->{'resptype'} eq 'option') {
+		    &OptionResponseAnalysis($r,$current_problem,
+					    $problem_data,
+					    \@Students);
+		} elsif ($current_problem->{'resptype'} eq 'radiobutton') {
+		    &radio_response_analysis($r,$current_problem,
+					     $problem_data,
+					     \@Students);
+		} elsif ($current_problem->{'resptype'} eq 'numerical') {
+		    &numerical_response_analysis($r,$current_problem,
+						 $problem_data,\@Students);
+		} else {
+		    $r->print('<div class="LC_warning">'
+                             .&mt('Analysis of [_1] is not supported.'
+                                 ,$current_problem->{'resptype'})
+                             .'</div>'
+                    );
+		}
+	    }
         }
         $r->print('<hr />');
     } else {
-        $r->print('<input type="submit" name="ProblemAnalysis" value="'.
-                  &mt('Analyze Problem').'" />');
+        my $submit_button = '<input type="submit" '.
+            'name="ProblemAnalysis" value="'.
+            &mt('Analyze Problem').'" />';
+        $r->print($submit_button);
         $r->print('&nbsp;'x5);
         $r->print('<h3>'.&mt('Please select a problem to analyze').'</h3>');
-        $r->print(&Apache::lonstathelpers::ProblemSelector
-                  ($problem_types));
+        $r->print(&Apache::lonstathelpers::problem_selector($problem_types,
+                                                            $submit_button));
     }
 }
 
@@ -175,7 +202,7 @@ sub numerical_response_analysis {
     my ($r,$problem,$problem_analysis,$students) = @_;
     my $c = $r->connection();
     #
-    if ($ENV{'form.AnalyzeOver'} !~ /^(tries|time)$/) {
+    if ($env{'form.AnalyzeOver'} !~ /^(tries|time)$/) {
         $r->print('Bad request');
     }
     #
@@ -184,9 +211,10 @@ sub numerical_response_analysis {
                                       $problem->{'respid'});
     # Gather student data
     my $response_data = &Apache::loncoursedata::get_response_data
-        (\@Apache::lonstatistics::SelectedSections,
+        ([&Apache::lonstatistics::get_selected_sections()],
+         [&Apache::lonstatistics::get_selected_groups()],
          $Apache::lonstatistics::enrollment_status,
-         $resource->{'symb'},$respid);
+         $resource->symb,$respid);
     #
     $problem_analysis->{'answercomputed'} = 1;
     if ($problem_analysis->{'answercomputed'}) {
@@ -198,26 +226,27 @@ sub numerical_response_analysis {
     }
     #
     if (ref($response_data) ne 'ARRAY') {
-        $r->print('<h2>'.
-                  &mt('There is no submission data for this resource').
-                  '</h2>');
+        $r->print('<div class="LC_warning">'
+                 .&mt('There is no submission data for this resource.')
+                 .'</div>'
+        );
         return;
     }
     my $analysis_html = '<table>';
-    for (my $plot_num = 1;$plot_num<=$ENV{'form.NumPlots'};$plot_num++) {
+    for (my $plot_num = 1;$plot_num<=$env{'form.NumPlots'};$plot_num++) {
         my $restriction_function;
         my $header_message;
         my $stats_message;
         my $post_message; # passed through &mt sooner rather than later
         my $no_data_message;
         my @extra_data;
-        if ($ENV{'form.AnalyzeOver'} eq 'tries') {
+        if ($env{'form.AnalyzeOver'} eq 'tries') {
             $restriction_function = sub {($_[0]->{'tries'} == $plot_num?1:0)};
             $header_message = 'Attempt [_1]';
             $stats_message = 
                 '[_1] submissions, [_2] correct, [_3] incorrect';
             $post_message = '';
-            $no_data_message = 'No data exists for attempt [_1]';
+            $no_data_message = 'No data exists for attempt [_1].';
         } else {
             my $starttime = &Apache::lonhtmlcommon::get_date_from_form
                 ('startdate_'.$plot_num);
@@ -265,9 +294,9 @@ sub numerical_response_analysis {
                                           $restriction_function);
         if ($stats->{'submission_count'} == 0) {
             $analysis_html.= 
-                '<tr><td colspan="2"><font size="+1"><b>'.
+                '<tr><td colspan="2"><div class="LC_warning">'.
                 &mt($no_data_message,$plot_num,@extra_data).
-                '</b></font></td></tr>';
+                '</div></td></tr>';
         } else {
             $analysis_html.= 
                 '<tr><td colspan="2" align="center"><font size="+1"><b>'.
@@ -303,21 +332,34 @@ sub numerical_plot_percent {
     #
     my $total = $stats->{'submission_count'};
     return '' if ($total == 0);
-    my $min_bin_size = $stats->{'min_percent'};
-    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;
+    my $max_bins = 50;
+    my $lowest_percent = $stats->{'min_percent'};
+    my $highest_percent = $stats->{'max_percent'};
+    my $percent_spread = $highest_percent - $lowest_percent;
+    foreach (qw/20 30 40 50 100 200/) {
+        if ($percent_spread < $_) {
+            $highest_percent =$_/2;
+            last;
+        }
     }
-    if (($high_bin -$low_bin)/$min_bin_size > 1000) {
-        $min_bin_size = abs($high_bin - $low_bin) / 1000;
+    $percent_spread = $highest_percent - $lowest_percent;
+    my $bin_size = 1;
+    foreach (qw/0.01 0.05 0.1 0.5 1 2 5 10 20 25 50 100/) {
+        if ($lowest_percent/2 < $_){
+            $bin_size = $_;
+	    if ( ($percent_spread/$bin_size) < $max_bins ) {
+		last;
+	    }
+        }
     }
     my @bins;
-    for (my $num = $low_bin;$num <= $high_bin;$num+=($min_bin_size/2)) {
-        push(@bins,$num);
+    for (my $bin = -$highest_percent;$bin<0;$bin+=$bin_size) {
+        push (@bins,$bin);
     }
+    for (my $bin = 0; $bin<$highest_percent;$bin+=$bin_size) {
+        push (@bins,$bin);
+    }
+    push(@bins,$highest_percent);
     #
     my @correct;
     my @incorrect;
@@ -325,46 +367,45 @@ sub numerical_plot_percent {
     while (my ($ans,$submissions) = each(%$responses)) {
         while (my ($submission,$counts) = each(%$submissions)) {
             my ($correct_count,$incorrect_count) = @$counts;
-            my $scaled_value = ($submission-$ans)/$ans;
-            my $bin=0;
-            for ($bin=0;$bin<$#bins;$bin++) { # not <= for a reason
+	    my $scaled_value = 
+		($ans) ? 100*($submission-$ans)/abs($ans)
+		       : 0;
+            if ($scaled_value < $bins[0]) {
+                $bins[0]=$scaled_value -1;
+            }
+            my $bin;
+            for ($bin=0;$bin<$#bins;$bin++) {
                 last if ($bins[$bin]>$scaled_value);
             }
-            $correct[$bin]+=$correct_count;
-            $incorrect[$bin]+=$incorrect_count;
-            $count[$bin]+=$correct_count+$incorrect_count;
+            $correct[$bin-1]+=$correct_count;
+            $incorrect[$bin-1]+=$incorrect_count;
+            $count[$bin-1]+=$correct_count+$incorrect_count;
         }
     }
     #
-    # Skip empty bins
-    my (@plot_correct,@plot_incorrect,@new_bins,@new_count);
-    my $min_skip = 2;
-    for (my $i=0;$i<=$#bins;$i++) {
-        my $sum=0;
-        for (my $j=-$min_skip;$j<=$min_skip && $i+$j<=$#bins;$j++) {
-            $sum += $correct[$i+$j] + $incorrect[$i+$j];
-        }
-        if ($sum) {
-            push(@new_bins,$bins[$i]);
-            push(@plot_correct,$correct[$i]);
-            push(@plot_incorrect,$incorrect[$i]);
-            push(@new_count,$correct[$i]+$incorrect[$i]);
-        }
-    }
-    @correct   = @plot_correct;
-    @incorrect = @plot_incorrect;
-    @count     = @new_count;
-    @bins      = @new_bins;
-    for (my $i=0;$i<=$#bins;$i++) {
+    my @plot_correct   = @correct;
+    my @plot_incorrect = @incorrect;
+    my $max;
+    for (my $i=0;$i<$#bins;$i++) {
         $plot_correct[$i]   *= 100/$total;
         $plot_incorrect[$i] *= 100/$total;
+        if (! defined($max) || 
+            $max < $plot_correct[$i]+$plot_incorrect[$i] ) {
+            $max = $plot_correct[$i]+$plot_incorrect[$i];
+        }
+    }
+    foreach (qw/1 5 10 15 20 25 30 40 50 75 100/) {
+        if ($max <$_) { $max = $_; last; }
     }
     #
-    my $title = &mt('Percent Difference');
-    my @labels = (1..scalar(@bins));
+    my %lt = &Apache::lonlocal::texthash(
+                 'title'  => 'Percent Difference',
+                 'xlabel' => 'Percent Difference from Correct',
+                 'ylabel' => 'Percent of Answers');
+    my @labels = (1..scalar(@bins)-1);
     my $graph = &Apache::loncommon::DrawBarGraph
-        ($title,'Percent difference from correct','Number of answers',
-         100,['#33FF00','#FF3300'],\@labels,\@plot_correct,\@plot_incorrect,
+        ($lt{'title'},$lt{'xlabel'},$lt{'ylabel'},
+         $max,['#33FF00','#FF3300'],\@labels,\@plot_correct,\@plot_incorrect,
          {xskip=>1});
     #
     my $table = $graph.$/.
@@ -377,7 +418,7 @@ sub numerical_plot_differences {
     #
     my $total = $stats->{'submission_count'};
     return '' if ($total == 0);
-    my $max_bins = 50;
+    my $max_bins = 21;
     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'};
@@ -386,7 +427,12 @@ sub numerical_plot_differences {
     } elsif ($low_bin < 0 && $high_bin < -$low_bin) {
         $high_bin = -$low_bin;
     }
-    if (($high_bin -$low_bin)/$min_bin_size * 2 > $max_bins) {
+    if ($high_bin == $low_bin) {
+	$high_bin+=1;
+	$low_bin-=1;
+    }
+    if (!$min_bin_size ||
+        ($high_bin -$low_bin)/$min_bin_size * 2 > $max_bins) {
         $min_bin_size = abs($high_bin - $low_bin) / $max_bins * 2;
     }
     my @bins;
@@ -401,27 +447,41 @@ sub numerical_plot_differences {
         while (my ($submission,$counts) = each(%$submissions)) {
             my ($correct_count,$incorrect_count) = @$counts;
             my $scaled_value = $submission-$ans;
+            if ($scaled_value < $bins[0]) {
+                $bins[0]=$scaled_value-1;
+            }
             my $bin=0;
-            for ($bin=0;$bin<$#bins;$bin++) { # not <= for a reason
+            for ($bin=0;$bin<$#bins;$bin++) {
                 last if ($bins[$bin]>$scaled_value);
             }
-            $correct[$bin]+=$correct_count;
-            $incorrect[$bin]+=$incorrect_count;
-            $count[$bin]+=$correct_count+$incorrect_count;
+            $correct[$bin-1]+=$correct_count;
+            $incorrect[$bin-1]+=$incorrect_count;
+            $count[$bin-1]+=$correct_count+$incorrect_count;
         }
     }
     my @plot_correct   = @correct;
     my @plot_incorrect = @incorrect;
+    my $max;
     for (my $i=0;$i<=$#bins;$i++) {
         $plot_correct[$i]   *= 100/$total;
         $plot_incorrect[$i] *= 100/$total;
+        if (! defined($max) || 
+            $max < $plot_correct[$i]+$plot_incorrect[$i] ) {
+            $max = $plot_correct[$i]+$plot_incorrect[$i];
+        }
+    }
+    foreach (qw/1 5 10 15 20 25 30 40 50 75 100/) {
+        if ($max <$_) { $max = $_; last; }
     }
     #
-    my $title = &mt('Difference between submission and correct');
-    my @labels = (1..scalar(@bins));
+    my %lt = &Apache::lonlocal::texthash(
+                 'title'  => 'Difference between submission and correct',
+                 'xlabel' => 'Difference from Correct',
+                 'ylabel' => 'Percent of Answers');
+    my @labels = (1..scalar(@bins)-1);
     my $graph = &Apache::loncommon::DrawBarGraph
-        ($title,'Difference from Correct','Number of answers',
-         100,['#33FF00','#FF3300'],\@labels,\@plot_correct,\@plot_incorrect,
+        ($lt{'title'},$lt{'xlabel'},$lt{'ylabel'},
+         $max,['#33FF00','#FF3300'],\@labels,\@plot_correct,\@plot_incorrect,
          {xskip=>1});
     #
     my $table = $graph.$/.
@@ -464,8 +524,12 @@ sub numerical_classify_responses {
         if ($stats{'max_abs'} < $abs_high) {
             $stats{'max_abs'} = $abs_high;
         }
-        my $low_percent  = 100 * abs($abs_low  / $subm{'correct'});
-        my $high_percent = 100 * abs($abs_high / $subm{'correct'});
+        my $low_percent;
+        my $high_percent;
+        if (defined($subm{'correct'}) && $subm{'correct'} != 0) {
+            $low_percent  = 100 * abs($abs_low  / $subm{'correct'});
+            $high_percent = 100 * abs($abs_high / $subm{'correct'});
+        }
         if (! defined($stats{'min_percent'}) ||
             $stats{'min_percent'} > $low_percent) {
             $stats{'min_percent'} = $low_percent;
@@ -498,7 +562,7 @@ sub numerical_classify_responses {
                 &capa::caparesponse_get_real_response($myunit,
                                                       $mysub,
                                                       \$scaled);
-            &Apache::lonnet::logthis('scaled = '.$scaled.' result ='.$result);
+#            &Apache::lonnet::logthis('scaled = '.$scaled.' result ='.$result);
             next if (! defined($scaled));
 #            next if ($result ne '6');
             my $submission = $scaled;
@@ -513,6 +577,8 @@ sub numerical_classify_responses {
             }
         }
     }
+    $stats{'correct_count'} |= 0;
+    $stats{'incorrect_count'} |= 0;
     $stats{'students'}=scalar(keys(%students));
     return (\%submission_data,\%stats);
 }
@@ -546,7 +612,9 @@ sub numerical_bin_table {
         '</tr>'.$/;
     for (my $i=0;$i<scalar(@{$bins}-1);$i++) {
         my $lownum = $bins->[$i];
+        if ($i == 0) { $lownum = '-&infin;'; }
         my $highnum = $bins->[$i+1];
+        if ($i == scalar(@{$bins})-2) { $highnum = '&infin;'; }
         $table .= 
             '<tr>'.
             '<td>'.$labels->[$i].'</td>'.
@@ -566,10 +634,7 @@ sub numerical_determine_answers {
     my ($r,$resource,$partid,$respid,$students)=@_;
     my $c = $r->connection();
     #
-    my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
-        ($r,'Student Answer Compilation Status',
-         'Student Answer Compilation Progress', scalar(@$students),
-         'inline',undef,'Statistics','stats_status');
+    my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin($r,scalar(@$students));
     #
     # Read in the cache (if it exists) before we start timing things.
     &Apache::lonstathelpers::ensure_proper_cache($resource->{'symb'});
@@ -587,13 +652,23 @@ sub numerical_determine_answers {
                                                                 $sdom);
         # make the key
         my $key = $partid.'.'.$respid;
+	# pick one of the possible answers
+	my $which = 'INTERNAL';
+	if (!exists($analysis->{$key}{$which})) {
+	    $which = (sort(keys(%{ $analysis->{$key} })))[0];
+	}
         foreach my $item ('answer','unit','ans_high','ans_low') {
-            $correct->{$sname.':'.$sdom}->{$item} = 
-                $analysis->{$key.'.'.$item}->[0];
+	    if (ref($analysis->{$key.'.'.$item}) eq 'ARRAY') {
+		$correct->{$sname.':'.$sdom}->{$item} = 
+		    $analysis->{$key.'.'.$item}[0];
+	    } else {
+		$correct->{$sname.':'.$sdom}->{$item} = 
+		    $analysis->{$key.'.'.$item}{$which}[0][0];
+	    }
         }
-        $answers{$analysis->{$key.'.answer'}->[0]}++;
+        $answers{$correct->{$sname.':'.$sdom}{'answer'}}++;
         &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
-                                                 &mt('last student'));
+                                                     'last student');
     }
     &Apache::lonstathelpers::write_analysis_cache();
     &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
@@ -717,7 +792,7 @@ sub circle {
 sub radio_response_analysis {
     my ($r,$problem,$problem_analysis,$students) = @_;
     #
-    if ($ENV{'form.AnalyzeOver'} !~ /^(tries|time)$/) {
+    if ($env{'form.AnalyzeOver'} !~ /^(tries|time)$/) {
         $r->print('Bad request');
     }
     #
@@ -746,9 +821,10 @@ sub radio_response_analysis {
     $analysis_html .= $table;
     # Gather student data
     my $response_data = &Apache::loncoursedata::get_response_data
-        (\@Apache::lonstatistics::SelectedSections,
+        ([&Apache::lonstatistics::get_selected_sections()],
+         [&Apache::lonstatistics::get_selected_groups()],
          $Apache::lonstatistics::enrollment_status,
-         $resource->{'symb'},$respid);
+         $resource->symb,$respid);
     my $correct;   # either a hash reference or a scalar
     if ($problem_analysis->{'answercomputed'} || scalar(@$concepts) > 1) {
         # This takes a while for large classes...
@@ -759,7 +835,7 @@ sub radio_response_analysis {
             my ($idx,@remainder) = split('&',$student->{'answer'});
             my ($answer) = ($remainder[$idx]=~/^(.*)=([^=]*)$/);
             $correct->{$student->{'username'}.':'.$student->{'domain'}}=
-                &Apache::lonnet::unescape($answer);
+                &unescape($answer);
         }
     } else {
         foreach my $foil (keys(%$foildata)) {
@@ -770,29 +846,29 @@ sub radio_response_analysis {
     }
     #
     if (! defined($response_data) || ref($response_data) ne 'ARRAY' ) {
-        $analysis_html = '<h2>'.
-            &mt('There is no submission data for this resource').
-            '</h2>';
+        $analysis_html = '<div class="LC_warning">'
+                        .&mt('There is no submission data for this resource.')
+                        .'</div>';
         $r->print($analysis_html);
         return;
     }
     #
     $analysis_html.='<table>';
-    for (my $plot_num = 1;$plot_num<=$ENV{'form.NumPlots'};$plot_num++) {
+    for (my $plot_num = 1;$plot_num<=$env{'form.NumPlots'};$plot_num++) {
         # classify data ->correct foil -> selected foil
         my ($restriction_function,
             $correct_foil_title,$incorrect_foil_title,
             $pre_graph_text,$post_graph_text,
             $no_data_text,@extra_data);
-        if ($ENV{'form.AnalyzeOver'} eq 'tries') {
+        if ($env{'form.AnalyzeOver'} eq 'tries') {
             $restriction_function = sub {($_[0]->{'tries'} == $plot_num?1:0)};
-            $correct_foil_title = 'Attempt '.$plot_num;
-            $incorrect_foil_title = 'Attempt '.$plot_num;
+            $correct_foil_title = &mt('Attempt [_1]',$plot_num);
+            $incorrect_foil_title = &mt('Attempt [_1]',$plot_num);
             $pre_graph_text = 
                 'Attempt [_1], [_2] submissions, [_3] correct, [_4] incorrect';
             $post_graph_text = '';
             $no_data_text = 'No data exists for attempt [_1]';
-        } elsif ($ENV{'form.AnalyzeOver'} eq 'time') {
+        } elsif ($env{'form.AnalyzeOver'} eq 'time') {
             my $starttime = &Apache::lonhtmlcommon::get_date_from_form
                 ('startdate_'.$plot_num);
             my $endtime = &Apache::lonhtmlcommon::get_date_from_form
@@ -803,7 +879,9 @@ sub radio_response_analysis {
                  &get_time_from_row($response_data->[-1]),
                  $plot_num);
             $pre_graph_text = 
-                'Data from [_6] to [_7]<br /> [_2] submissions from [_5] students, [_3] correct, [_4] incorrect';
+                'Data from [_6] to [_7]'
+               .'<br />'
+               .'[_2] submissions from [_5] students, [_3] correct, [_4] incorrect';
             $extra_data[0] = &Apache::lonlocal::locallocaltime($starttime);
             $extra_data[1] = &Apache::lonlocal::locallocaltime($endtime);
             #
@@ -843,8 +921,9 @@ sub radio_response_analysis {
         # Concept Plot
         my $concept_plot = '';
         if (scalar(@$concepts) > 1) {
+            my $title = &mt('Correct Concepts');
             $concept_plot = &RR_concept_plot($concepts,$foil_choice_data,
-                                             'Correct Concepts');
+                                             $title);
         }
         # % Choosing plot
         my $choice_plot = &RR_create_percent_selected_plot
@@ -862,16 +941,14 @@ sub radio_response_analysis {
             $choice_plot  ne '' ||
             $stacked_plot ne '') {
             my $correct = $foil_choice_data->{'_correct'};
-            if (! defined($correct) || $correct eq '') {
-                $correct = 0;
-            }
-            my $incorrect = 
+            $correct |= 0;
+            my $incorrect = $foil_choice_data->{'_count'}-$correct;
             $analysis_html.= '<tr><td colspan="4" align="center">'.
                 '<font size="+1">'.
                 &mt($pre_graph_text,
                     $plot_num,$foil_choice_data->{'_count'},
                     $correct,
-                    $foil_choice_data->{'_count'}-$correct,
+                    $incorrect,
                     $foil_choice_data->{'_students'},
                     @extra_data).
                     '</td></tr>'.$/;
@@ -893,11 +970,13 @@ sub radio_response_analysis {
             }
         } elsif ($no_data_text ne '') {
             $analysis_html.='<tr><td colspan="4" align="center">'.
+                '<div class="LC_warning">'.
                 &mt($no_data_text,
                     $plot_num,$foil_choice_data->{'_count'},
                     $correct,                    
                     $foil_choice_data->{'_count'}-$correct,
-                    @extra_data);
+                    @extra_data).
+                '</div>';
             if (defined($post_graph_text)) {
                 $analysis_html.='<br />'.$post_graph_text;
             }
@@ -916,7 +995,7 @@ sub ensure_start_end_times {
             (localtime($last - $sec_in_day*($plot_num-1)))[3..5];
         $start = &Time::Local::timelocal(0,0,0,$sday,$smon,$syear);
         $end   = $start + $sec_in_day;
-        if ($plot_num == $ENV{'form.NumPlots'}) {
+        if ($plot_num == $env{'form.NumPlots'}) {
             $start = $first;
         }
     }
@@ -959,10 +1038,11 @@ sub RR_concept_plot {
     for (my $i=0;$i<=$#correct;$i++) { 
         $correct[$i] = sprintf('%0f',$correct[$i]/$total*100);
     }
-    my $xlabel = 'concept';
+    my $xlabel = &mt('concept');
+    my $ylabel = &mt('Percent Choosing');
     my $plot=  &Apache::loncommon::DrawBarGraph($title,
                                                 $xlabel,
-                                                'Percent Choosing',
+                                                $ylabel,
                                                 100,
                                                 ['#33ff00','#ff3300'],
                                                 undef,
@@ -1028,10 +1108,11 @@ sub RR_create_percent_selected_plot {
         @labels = (1 .. scalar(@correct));
     }
     #
-    my $xlabel = 'foil chosen';
+    my $xlabel = &mt('foil chosen');
+    my $ylabel = &mt('Percent Choosing');
     my $plot=  &Apache::loncommon::DrawBarGraph($title,
                                                 $xlabel,
-                                                'Percent Choosing',
+                                                $ylabel,
                                                 100,
                                                 ['#33ff00','#ff3300'],
                                                 \@labels,
@@ -1092,8 +1173,10 @@ sub RR_create_stacked_selection_plot {
         push(@empty_row,0);
     }
     #
+    my $xlabel = &mt('Correct Foil');
+    my $ylabel = &mt('foils chosen Incorrectly');
     my $graph = &Apache::loncommon::DrawBarGraph
-        ($title,'Correct Foil','foils chosen Incorrectly',
+        ($title,$xlabel,$ylabel,
          100,$plotcolors,\@labels,\@empty_row,@dataset);
     return ($graph,\%count_per_foil);
 }
@@ -1153,32 +1236,34 @@ sub OptionResponseAnalysis {
                               $problem->{'respid'});
     # Note: part data is not needed.
     my $PerformanceData = &Apache::loncoursedata::get_response_data
-        (\@Apache::lonstatistics::SelectedSections,
+        ([&Apache::lonstatistics::get_selected_sections()],
+         [&Apache::lonstatistics::get_selected_groups()],
          $Apache::lonstatistics::enrollment_status,
-         $resource->{'symb'},$respid);
+         $resource->symb,$respid);
     if (! defined($PerformanceData) || 
         ref($PerformanceData) ne 'ARRAY' ) {
-        $r->print('<h2>'.
-                  &mt('There is no student data for this problem.').
-                  '</h2>');
+        $r->print('<div class="LC_warning">'
+                 .&mt('There is no student data for this problem.')
+                 .'</div>'
+        );
     }  else {
         $r->rflush();
-        if ($ENV{'form.AnalyzeOver'} eq 'tries') {
+        if ($env{'form.AnalyzeOver'} eq 'tries') {
             my $analysis_html = &OR_tries_analysis($r,
                                                    $PerformanceData,
                                                    $problem_data);
             $r->print($analysis_html);
             $r->rflush();
-        } elsif ($ENV{'form.AnalyzeOver'} eq 'time') {
+        } elsif ($env{'form.AnalyzeOver'} eq 'time') {
             my $analysis_html = &OR_time_analysis($PerformanceData,
                                                   $problem_data);
             $r->print($analysis_html);
             $r->rflush();
         } else {
-            $r->print('<h2>'.
-                      &mt('The analysis you have selected is '.
-                          'not supported at this time').
-                      '</h2>');
+            $r->print('div class="LC_warning"'
+                     .&mt('The analysis you have selected is not supported at this time.')
+                     .'</div>'
+            );
         }
     }
 }
@@ -1191,7 +1276,7 @@ sub OptionResponseAnalysis {
 sub OR_tries_analysis {
     my ($r,$PerformanceData,$ORdata) = @_;
     my $mintries = 1;
-    my $maxtries = $ENV{'form.NumPlots'};
+    my $maxtries = $env{'form.NumPlots'};
     my ($table,$Foils,$Concepts) = &build_foil_index($ORdata);
     if (! defined($Concepts)) {
         $Concepts = [];
@@ -1255,12 +1340,18 @@ sub OR_tries_analysis {
         if (! defined($response_data{'_total'}->[$try]) ||
             $response_data{'_total'}->[$try] == 0) { 
             if ($try > 1) {
-                $analysis_html.= '<tr><td align="center" colspan="4"><b>'.
-                    &mt('None of the selected students attempted the problem more than [_1] times.',$try-1).
-                    '</b></td></tr>';
+                $analysis_html.= '<tr><td colspan="4">'
+                                .'<div class="LC_info">'
+                                .&mt('None of the selected students attempted the problem more than [quant,_1,time].'
+                                    ,$try-1)
+                                .'</div>'
+                                .'</td></tr>';
             } else {
-                $analysis_html.= '<tr><td colspan="4" align="center"><b>'.
-                    &mt('None of the selected students have attempted the problem').'</b></td></tr>';
+                $analysis_html.= '<tr><td colspan="4">'
+                                .'<div class="LC_info">'
+                                .&mt('None of the selected students have attempted the problem.')
+                                .'</div>'
+                                .'</td></tr>';
             }
             last;
         }
@@ -1281,14 +1372,19 @@ sub OR_tries_analysis {
                 }
             }
             #
+            my %lt = &Apache::lonlocal::texthash(
+                         'title'  => 'Correct Concepts',
+                         'xlabel' => 'Concept Number',
+                         'ylabel' => 'Percent Correct');
             $concept_graph = &Apache::loncommon::DrawBarGraph
-                ('Correct Concepts','Concept Number','Percent Correct',
+                ($lt{'title'},$lt{'xlabel'},$lt{'ylabel'},
                  100,$plotcolors,undef,\@concept_plot_data,{xskip=>1});
         }
         #
         # Create Foil Plots
         my $data_count = $response_data{'_total'}->[$try];
         my $correct = $response_data{'_correct'}->[$try];
+        $correct |= 0;
         my @Datasets;
         foreach my $option ('_correct',@{$ORdata->{'_Options'}}) {
             next if (! exists($foil_plot[$try]->{$option}));
@@ -1319,8 +1415,12 @@ sub OR_tries_analysis {
             push(@Labels,'');
         }
         #
+       my %lt = &Apache::lonlocal::texthash(
+                    'title'  => 'Correct Statements',
+                    'xlabel' => 'Statement',
+                    'ylabel' => '% Answered Correct');
         my $correct_graph = &Apache::loncommon::DrawBarGraph
-            ('Correct Statements','Statement','% Answered Correct',
+            ($lt{'title'},$lt{'xlabel'},$lt{'ylabel'},
              100,$plotcolors,\@Labels,$Datasets[0],{xskip=>1});
         
         #
@@ -1331,8 +1431,12 @@ sub OR_tries_analysis {
         }
         my $count = $response_data{'_total'}->[$try] - 
                                            $response_data{'_correct'}->[$try];
+        %lt = &Apache::lonlocal::texthash(
+                  'title'  => 'Incorrect Statements',
+                  'xlabel' => 'Statement',
+                  'ylabel' => '% Chosen Incorrectly');
         my $incorrect_graph = &Apache::loncommon::DrawBarGraph
-            ('Incorrect Statements','Statement','% Chosen Incorrectly',
+            ($lt{'title'},$lt{'xlabel'},$lt{'ylabel'},
              100,$plotcolors,\@Labels,@Datasets,{xskip=>1});
         $analysis_html.= 
             '<tr><td colspan="4" align="center">'.
@@ -1394,13 +1498,14 @@ sub OR_time_analysis {
     if (defined($Concepts)) { $num_concepts = scalar(@$Concepts); }
     #
     if ($num_concepts < 2) {
-        $table = '<h3>'.
-            &mt('Not enough data for concept analysis.  '.
-                'Performing Foil Analysis').
-                '</h3>'.$table;
+        $table = '<p class="LC_info">'.
+                 &mt('Not enough data for concept analysis.'.
+                     ' Performing Foil Analysis instead.').
+                 '</p>'.
+                 $table;
     }
     #
-    my $num_plots = $ENV{'form.NumPlots'};
+    my $num_plots = $env{'form.NumPlots'};
     my $num_data = scalar(@$performance_data)-1;
     #
     my $current_index;
@@ -1451,9 +1556,10 @@ sub OR_time_analysis {
         ##
         my ($processed_time_data,$correct,$data_count,$student_count) =
             &OR_time_process_data($performance_data,$begin_index,$end_index);
+        $correct |= 0;
         ##
         $table .= '<tr><td colspan="4" align="center"><font size="+1">'.
-            &mt('[_1] submissions from [_2] students, [_3] correct, [_4] incorrect',
+            &mt('[quant,_1,submission,submissions,No submissions] from [quant,_2,student], [_3] correct, [_4] incorrect',
                 $data_count,$student_count,$correct,$data_count-$correct).
                 '</font></td></tr>'.$/;
         my $concept_correct_plot = '';
@@ -1475,7 +1581,7 @@ sub OR_time_analysis {
         $table .= '<tr><td colspan="4" align="center">'.
             &mt('Start time: [_1]',$startdateform).'<br />'.
             &mt('End time: [_1]',$enddateform).'</td></tr>'.$/;
-        $table.= '<tr><td colspan="4">&nbsp</td></tr>'.$/;
+        $table.= '<tr><td colspan="4">&nbsp;</td></tr>'.$/;
     }
     $table .= '</table>';
     #
@@ -1486,7 +1592,11 @@ sub OR_Foil_Time_Analysis {
     my ($processed_time_data,$correct,$data_count,$student_count,
         $ORdata,$Foils,$Concepts) = @_;
     if ($data_count <= 0) {
-        return ('<h2>'.&mt('There is no data to plot').'</h2>','');
+        return ('<div class="LC_warning">'
+               .&mt('There is no data to plot.')
+               .'</div>'
+               ,''
+        );
     }
     my $analysis_html;
     my @plotdata;
@@ -1521,9 +1631,13 @@ sub OR_Foil_Time_Analysis {
     }
     #
     # Create the plot
-    my $correct_plot = &Apache::loncommon::DrawBarGraph('Correct Statements',
-                                                        'Statement Number',
-                                                        'Percent Correct',
+    my %lt = &Apache::lonlocal::texthash(
+                 'title'  => 'Correct Statements',
+                 'xlabel' => 'Statement Number',
+                 'ylabel' => 'Percent Correct');
+    my $correct_plot = &Apache::loncommon::DrawBarGraph($lt{'title'},
+                                                        $lt{'xlabel'},
+                                                        $lt{'ylabel'},
                                                         100,
                                                         $plotcolors,
                                                         undef,
@@ -1532,10 +1646,14 @@ sub OR_Foil_Time_Analysis {
     for (my $j=0; $j< scalar(@{$plotdata[0]});$j++) {
         $plotdata[0]->[$j]=0;
     }
+    %lt = &Apache::lonlocal::texthash(
+              'title'  => 'Incorrect Statements',
+              'xlabel' => 'Statement Number',
+              'ylabel' => 'Incorrect Option Choice');
     my $incorrect_plot = 
-        &Apache::loncommon::DrawBarGraph('Incorrect Statements',
-                                         'Statement Number',
-                                         'Incorrect Option Choice',
+        &Apache::loncommon::DrawBarGraph($lt{'title'},
+                                         $lt{'xlabel'},
+                                         $lt{'ylabel'},
                                          100,
                                          $plotcolors,
                                          undef,
@@ -1564,9 +1682,13 @@ sub OR_Concept_Time_Analysis {
     }
     #
     # Create the plot
-    return &Apache::loncommon::DrawBarGraph('Correct Concepts',
-                                            'Concept Number',
-                                            'Percent Correct',
+    my %lt = &Apache::lonlocal::texthash(
+                 'title'  => 'Correct Concepts',
+                 'xlabel' => 'Concept Number',
+                 'ylabel' => 'Percent Correct');
+    return &Apache::loncommon::DrawBarGraph($lt{'title'},
+                                            $lt{'xlabel'},
+                                            $lt{'ylabel'},
                                             100,
                                             $plotcolors,
                                             undef,
@@ -1662,23 +1784,23 @@ sub build_foil_index {
     }
     #
     # Build up the table of row labels.
-    my $table = '<table border="1" >'."\n";
+    my $table = &Apache::loncommon::start_data_table();
     if (@Concepts > 1) {
-        $table .= '<tr>'.
+        $table .= &Apache::loncommon::start_data_table_header_row().
             '<th>'.&mt('Concept Number').'</th>'.
             '<th>'.&mt('Concept').'</th>'.
             '<th>'.&mt('Foil Number').'</th>'.
             '<th>'.&mt('Foil Name').'</th>'.
             '<th>'.&mt('Foil Text').'</th>'.
             '<th>'.&mt('Correct Value').'</th>'.
-            "</tr>\n";
+            &Apache::loncommon::end_data_table_header_row();
     } else {
-        $table .= '<tr>'.
+        $table .= &Apache::loncommon::start_data_table_header_row().
             '<th>'.&mt('Foil Number').'</th>'.
             '<th>'.&mt('Foil Name').'</th>'.
             '<th>'.&mt('Foil Text').'</th>'.
             '<th>'.&mt('Correct Value').'</th>'.
-            "</tr>\n";
+            &Apache::loncommon::end_data_table_header_row();
     }        
     my $conceptindex = 1;
     my $foilindex = 1;
@@ -1686,39 +1808,39 @@ sub build_foil_index {
         my @FoilsInConcept = @{$concept->{'foils'}};
         my $firstfoil = shift(@FoilsInConcept);
         if (@Concepts > 1) {
-            $table .= '<tr>'.
+            $table .= &Apache::loncommon::start_data_table_row().
                 '<td>'.$conceptindex.'</td>'.
                 '<td>'.&HTML::Entities::encode($concept->{'name'},'<>&"').'</td>'.
                 '<td>'.$foilindex++.'</td>'.
                 '<td>'.&HTML::Entities::encode($Foildata{$firstfoil}->{'name'},'<>&"').'</td>'.
                 '<td>'.$Foildata{$firstfoil}->{'text'}.'</td>'.
                 '<td>'.&HTML::Entities::encode($Foildata{$firstfoil}->{'value'},'<>&"').'</td>'.
-                "</tr>\n";
+                &Apache::loncommon::end_data_table_row();
         } else {
-            $table .= '<tr>'.
+            $table .= &Apache::loncommon::start_data_table_row().
                 '<td>'.$foilindex++.'</td>'.
                 '<td>'.&HTML::Entities::encode($Foildata{$firstfoil}->{'name'},'<>&"').'</td>'.
                 '<td>'.$Foildata{$firstfoil}->{'text'}.'</td>'.
                 '<td>'.&HTML::Entities::encode($Foildata{$firstfoil}->{'value'},'<>&"').'</td>'.
-                "</tr>\n";
+                &Apache::loncommon::end_data_table_row();
         }
         foreach my $foilid (@FoilsInConcept) {
             if (@Concepts > 1) {
-                $table .= '<tr>'.
+                $table .= &Apache::loncommon::start_data_table_row().
                     '<td></td>'.
                     '<td></td>'.
                     '<td>'.$foilindex.'</td>'.
                     '<td>'.&HTML::Entities::encode($Foildata{$foilid}->{'name'},'<>&"').'</td>'.
                     '<td>'.$Foildata{$foilid}->{'text'}.'</td>'.
                     '<td>'.&HTML::Entities::encode($Foildata{$foilid}->{'value'},'<>&"').'</td>'.
-                    "</tr>\n";
+                    &Apache::loncommon::end_data_table_row();
             } else {
-                $table .= '<tr>'.
+                $table .= &Apache::loncommon::start_data_table_row().
                     '<td>'.$foilindex.'</td>'.
                     '<td>'.&HTML::Entities::encode($Foildata{$foilid}->{'name'},'<>&"').'</td>'.
                     '<td>'.$Foildata{$foilid}->{'text'}.'</td>'.
                     '<td>'.&HTML::Entities::encode($Foildata{$foilid}->{'value'},'<>&"').'</td>'.
-                    "</tr>\n";
+                    &Apache::loncommon::end_data_table_row();
             }                
         } continue {
             $foilindex++;
@@ -1726,7 +1848,7 @@ sub build_foil_index {
     } continue {
         $conceptindex++;
     }
-    $table .= "</table>\n";
+    $table .= &Apache::loncommon::end_data_table();
     #
     # Build option index with color stuff
     return ($table,\@Foils,\@Concepts);
@@ -1782,99 +1904,93 @@ sub build_foil_key {
 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
     my $Str = '';
-    $Str .= &Apache::lonhtmlcommon::breadcrumbs
-        (undef,'Detailed Problem Analysis');
-    $Str .= '<table cellspacing="5">'."\n";
-    $Str .= '<tr>';
-    $Str .= '<td align="center"><b>'.&mt('Sections').'</b></td>';
-    $Str .= '<td align="center"><b>'.&mt('Enrollment Status').'</b></td>';
-#    $Str .= '<td align="center"><b>'.&mt('Sequences and Folders').'</b></td>';
-    $Str .= '<td align="center">&nbsp;</td>';
-    $Str .= '</tr>'."\n";
+    $Str .= '<p>';
+    $Str .= &Apache::loncommon::start_data_table();
+    $Str .= &Apache::loncommon::start_data_table_header_row();
+    $Str .= '<th>'.&mt('Sections').'</th>';
+    $Str .= '<th>'.&mt('Groups').'</th>';
+    $Str .= '<th>'.&mt('Access Status').'</th>';
+    $Str .= '<th>'.&mt('Options').'</th>';
+    $Str .= &Apache::loncommon::end_data_table_header_row();
     ##
     ## 
-    $Str .= '<tr><td align="center">'."\n";
+    $Str .= &Apache::loncommon::start_data_table_row();
+    $Str .= '<td align="center">'."\n";
     $Str .= &Apache::lonstatistics::SectionSelect('Section','multiple',5);
     $Str .= '</td>';
     #
+    $Str .= '<td align="center">'."\n";
+    $Str .= &Apache::lonstatistics::GroupSelect('Group','multiple',5);
+    $Str .= '</td>';
+    #
     $Str .= '<td align="center">';
     $Str .= &Apache::lonhtmlcommon::StatusOptions(undef,undef,5);
     $Str .= '</td>';
     #
-#    $Str .= '<td align="center">';
-    my $only_seq_with_assessments = sub { 
-        my $s=shift;
-        if ($s->{'num_assess'} < 1) { 
-            return 0;
-        } else { 
-            return 1;
-        }
-    };
-    &Apache::lonstatistics::MapSelect('Maps','multiple,all',5,
-                                              $only_seq_with_assessments);
     ##
     ##
-    $Str .= '<td>';
+    $Str .= '<td valign="top">';
     ##
     my $showprob_checkbox = 
-        '<input type="checkbox" name="show_prob" value="true" ';
-    if ($ENV{'form.show_prob'} eq 'true') {
-        $showprob_checkbox .= 'checked ';
+        '<input type="checkbox" name="show_prob" value="true"';
+    if ($env{'form.show_prob'} eq 'true') {
+        $showprob_checkbox .= ' checked="checked"';
     }
     $showprob_checkbox.= ' />';
-    $Str.= '<nobr><label>'.
-        &mt('Show problem [_1]',$showprob_checkbox).
-        '</label></nobr><br />';
+    $Str.= '<span class="LC_nobreak"><label>'.
+        $showprob_checkbox.' '.&mt('Show problem').
+        '</label></span><br />';
     ##
     my $analyze_selector = '<select name="AnalyzeOver" >';
     $analyze_selector .= '<option value="tries" ';
-    if (! exists($ENV{'form.AnalyzeOver'}) || 
-        $ENV{'form.AnalyzeOver'} eq 'tries'){
+    if (! exists($env{'form.AnalyzeOver'}) || 
+        $env{'form.AnalyzeOver'} eq 'tries'){
         # Default to tries
-        $analyze_selector .= ' selected ';
+        $analyze_selector .= ' selected="selected" ';
     }
     $analyze_selector .= '>'.&mt('Tries').'</option>';
     $analyze_selector .= '<option value="time" ';
-    $analyze_selector .= ' selected ' if ($ENV{'form.AnalyzeOver'} eq 'time');
+    $analyze_selector .= ' selected ' if ($env{'form.AnalyzeOver'} eq 'time');
     $analyze_selector .= '>'.&mt('Time').'</option>';
     $analyze_selector .= '</select>';
-    $Str .= '<nobr><label>'.
+    $Str .= '<span class="LC_nobreak"><label>'.
         &mt('Analyze Over [_1] [_2]',
             $analyze_selector,
             &Apache::loncommon::help_open_topic('Analysis_Analyze_Over')).
-            '</label></nobr><br />'.$/;
+            '</label></span><br />'.$/;
     ##
     my $numplots_selector = '<select name="NumPlots">';
-    if (! exists($ENV{'form.NumPlots'}) 
-        || $ENV{'form.NumPlots'} < 1 
-        || $ENV{'form.NumPlots'} > 20) {
-        $ENV{'form.NumPlots'} = 5;
+    if (! exists($env{'form.NumPlots'}) 
+        || $env{'form.NumPlots'} < 1 
+        || $env{'form.NumPlots'} > 20) {
+        $env{'form.NumPlots'} = 5;
     }
     foreach my $i (1,2,3,4,5,6,7,8,10,15,20) {
         $numplots_selector .= '<option value="'.$i.'" ';
-        if ($ENV{'form.NumPlots'} == $i) { $numplots_selector.=' selected '; }
+        if ($env{'form.NumPlots'} == $i) { $numplots_selector.=' selected="selected" '; }
         $numplots_selector .= '>'.$i.'</option>';
     }
-    $numplots_selector .= '</select></nobr><br />';
-    $Str .= '<nobr><label>'.&mt('Number of Plots [_1]',$numplots_selector).
-        '</label></nobr>';
+    $numplots_selector .= '</select>';
+    $Str .= '<span class="LC_nobreak"><label>'.&mt('Number of Plots [_1]',$numplots_selector).
+        '</label></span><br />';
     ##
-    $Str .= '<nobr><label>'.&mt('Status: [_1]',
-                                 '<input type="text" '.
-                                 'name="stats_status" size="60" value="" />'
-                                 ).
-                    '</label></nobr>';
     $Str .= '</td>';
     ##
     ##
-    $Str .= '</tr>'."\n";
-    $Str .= '</table>'."\n";
+    $Str .= &Apache::loncommon::end_data_table_row();
+    $Str .= &Apache::loncommon::end_data_table();
+    $Str .= '<p class="LC_nobreak"><label>'
+           .&mt('Status: [_1]',
+                    '<input type="text" name="stats_status"'
+                   .' size="60" value="" readonly="readonly" />')
+           .'</label></p>';
+    $Str .= '</p>';
     return $Str;
 }
 
@@ -1906,7 +2022,7 @@ sub hashify_attempt {
     my %attempt;
     $attempt{'student'}    = $row->[&Apache::loncoursedata::RD_sname()];
     $attempt{'tries'}      = $row->[&Apache::loncoursedata::RD_tries()];
-    $attempt{'submission'} = &Apache::lonnet::unescape($row->[&Apache::loncoursedata::RD_submission()]);
+    $attempt{'submission'} = &unescape($row->[&Apache::loncoursedata::RD_submission()]);
     $attempt{'award'}      = $row->[&Apache::loncoursedata::RD_awarddetail()];
     $attempt{'timestamp'}  = $row->[&Apache::loncoursedata::RD_timestamp()];
     return %attempt;
@@ -1930,12 +2046,12 @@ sub Process_OR_Row {
     my @Foilsubs   = split('&',$submission);
     for (my $j=0;$j<=$#Foilgrades;$j++) {
         my ($foilid,$correct)  = split('=',$Foilgrades[$j]);
-        $foilid = &Apache::lonnet::unescape($foilid);
+        $foilid = &unescape($foilid);
         my (undef,$submission) = split('=',$Foilsubs[$j]);
         if ($correct) {
             $RowData{$foilid}->{'_correct'}++;
         } else {
-            $submission = &Apache::lonnet::unescape($submission);
+            $submission = &unescape($submission);
             $RowData{$foilid}->{$submission}++;
         }
         $RowData{$foilid}->{'_total'}++;