--- loncom/interface/statistics/lonproblemanalysis.pm	2003/10/24 13:38:06	1.46
+++ loncom/interface/statistics/lonproblemanalysis.pm	2004/02/18 19:16:55	1.70
@@ -1,6 +1,6 @@
 # The LearningOnline Network with CAPA
 #
-# $Id: lonproblemanalysis.pm,v 1.46 2003/10/24 13:38:06 matthew Exp $
+# $Id: lonproblemanalysis.pm,v 1.70 2004/02/18 19:16:55 matthew Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -24,7 +24,6 @@
 #
 # http://www.lon-capa.org/
 #
-
 package Apache::lonproblemanalysis;
 
 use strict;
@@ -34,6 +33,7 @@ use Apache::lonhtmlcommon();
 use Apache::loncoursedata();
 use Apache::lonstatistics;
 use Apache::lonlocal;
+use Apache::lonstathelpers;
 use HTML::Entities();
 use Time::Local();
 use Spreadsheet::WriteExcel();
@@ -43,37 +43,40 @@ my $plotcolors = ['#33ff00',
                   '#66ccff', '#ff9999', '#cccc33', '#660000', '#33cc66',
                   ]; 
 
-my @SubmitButtons = ({ name => 'ProblemAnalyis',
+my @SubmitButtons = ({ name => 'PrevProblemAnalysis',
+                       text => 'Previous Problem' },
+                     { name => 'ProblemAnalysis',
                        text => 'Analyze Problem Again' },
+                     { name => 'NextProblemAnalysis',
+                       text => 'Next Problem' },
+                     { name => 'break'},
                      { name => 'ClearCache',
                        text => 'Clear Caches' },
                      { name => 'updatecaches',
                        text => 'Update Student Data' },
                      { name => 'SelectAnother',
-                       text => 'Choose a different resource' },
+                       text => 'Choose a different Problem' },
                      { name => 'ExcelOutput',
                        text => 'Produce Excel Output' });
 
-sub render_resource {
-    my ($resource) = @_;
-    ##
-    ## Render the problem
-    my $base;
-    ($base,undef) = ($resource->{'src'} =~ m|(.*/)[^/]*$|);
-    $base = "http://".$ENV{'SERVER_NAME'}.$base;
-    my $rendered_problem = 
-        &Apache::lonnet::ssi_body($resource->{'src'});
-    $rendered_problem =~ s/<\s*form\s*/<nop /g;
-    $rendered_problem =~ s|(<\s*/form\s*>)|<\/nop>|g;
-    return '<table bgcolor="ffffff"><tr><td>'.
-        '<base href="'.$base.'" />'.
-        $rendered_problem.
-        '</td></tr></table>';
-}
 
 sub BuildProblemAnalysisPage {
     my ($r,$c)=@_;
-    $r->print('<h2>'.&mt('Option Response Problem Analysis').'</h2>');
+    #
+    my %Saveable_Parameters = ('Status' => 'scalar',
+                               'Section' => 'array',
+                               'NumPlots' => 'scalar',
+                               'AnalyzeAs' => 'scalar',
+                               'AnalyzeOver' => 'scalar',
+                               );
+    &Apache::loncommon::store_course_settings('problem_analysis',
+                                              \%Saveable_Parameters);
+    &Apache::loncommon::restore_course_settings('problem_analysis',
+                                                \%Saveable_Parameters);
+    #
+    &Apache::lonstatistics::PrepareClasslist();
+    #
+    $r->print('<h2>'.&mt('Detailed Problem Analysis').'</h2>');
     $r->print(&CreateInterface());
     #
     my @Students = @Apache::lonstatistics::Students;
@@ -96,33 +99,76 @@ sub BuildProblemAnalysisPage {
     }
     $r->rflush();
     #
+    my $problem_types = '(option|radiobutton|numerical)';
     if (exists($ENV{'form.problemchoice'}) && 
         ! exists($ENV{'form.SelectAnother'})) {
         foreach my $button (@SubmitButtons) {
-            $r->print('<input type="submit" name="'.$button->{'name'}.'" '.
-                      'value="'.&mt($button->{'text'}).'" />');
-            $r->print('&nbsp;'x5);
+            if ($button->{'name'} eq 'break') {
+                $r->print("<br />\n");
+            } else {
+                $r->print('<input type="submit" name="'.$button->{'name'}.'" '.
+                          'value="'.&mt($button->{'text'}).'" />');
+                $r->print('&nbsp;'x5);
+            }
         }
-        $r->print('<input type="hidden" name="problemchoice" value="'.
-                  $ENV{'form.problemchoice'}.'" />');
         #
         $r->print('<hr />');
-        #
-        my ($symb,$part,$resid) = &get_problem_symb(
-                  &Apache::lonnet::unescape($ENV{'form.problemchoice'}));
         $r->rflush();
         #
-        my $resource = &get_resource_from_symb($symb);
-        if (! defined($resource)) {
+        # Determine which problem we are to analyze
+        my $current_problem = &Apache::lonstathelpers::get_target_from_id
+            ($ENV{'form.problemchoice'});
+        #
+        my ($prev,$curr,$next) = 
+            &Apache::lonstathelpers::get_prev_curr_next($current_problem,
+                                                        $problem_types,
+                                                        'response',
+                                                        );
+        if (exists($ENV{'form.PrevProblemAnalysis'}) && defined($prev)) {
+            $current_problem = $prev;
+        } elsif (exists($ENV{'form.NextProblemAnalysis'}) && defined($next)) {
+            $current_problem = $next;
+        } else {
+            $current_problem = $curr;
+        }
+        #
+        # Store the current problem choice and send it out in the form
+        $ENV{'form.problemchoice'} = 
+            &Apache::lonstathelpers::make_target_id($current_problem);
+        $r->print('<input type="hidden" name="problemchoice" value="'.
+                  $ENV{'form.problemchoice'}.'" />');
+        #
+        if (! defined($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>');
+            $r->print(&Apache::lonstathelpers::render_resource($resource));
             $r->rflush();
             my %Data = &get_problem_data($resource->{'src'});
-            my $ProblemData = $Data{$part.'.'.$resid};
-            &OptionResponseAnalysis($r,$resource,$resid,$ProblemData,
-                                    \@Students);
+            my $ProblemData = $Data{$current_problem->{'part'}.
+                                    '.'.
+                                    $current_problem->{'respid'}};
+            if ($current_problem->{'resptype'} eq 'option') {
+                &OptionResponseAnalysis($r,$current_problem,
+                                        $ProblemData,
+                                        \@Students);
+            } elsif ($current_problem->{'resptype'} eq 'radiobutton') {
+                &RadioResponseAnalysis($r,$current_problem,
+                                       $ProblemData,
+                                       \@Students);
+            } elsif ($current_problem->{'resptype'} eq 'numerical') {
+#                if (exists($ENV{'form.ExcelOutput'})) {
+                    &prepare_excel_output($r,$current_problem,
+                                          $ProblemData,\@Students);
+#                } else {
+#                    &NumericalResponseAnalysis($r,$current_problem,
+#                                               $ProblemData,\@Students);
+#                }
+            } else {
+                $r->print('<h2>This analysis is not supported</h2>');
+            }
         }
         $r->print('<hr />');
     } else {
@@ -130,8 +176,439 @@ sub BuildProblemAnalysisPage {
                   &mt('Analyze Problem').'" />');
         $r->print('&nbsp;'x5);
         $r->print('<h3>'.&mt('Please select a problem to analyze').'</h3>');
-        $r->print(&ProblemSelector());
+        $r->print(&Apache::lonstathelpers::ProblemSelector
+                  ($problem_types));
+    }
+}
+
+
+#########################################################
+#########################################################
+##
+##      Excel output of student answers and correct answers
+##
+#########################################################
+#########################################################
+sub prepare_excel_output {
+    my ($r,$problem,$ProblemData,$Students) = @_;
+    my ($resource,$respid,$partid) = ($problem->{'resource'},
+                                      $problem->{'respid'},
+                                      $problem->{'part'});
+    $r->print('<h2>'.
+              &mt('Preparing Excel spreadsheet of student responses').
+              '</h2>');
+    #
+    &GetStudentAnswers($r,$problem,$Students);
+    #
+    my @Columns = ( 'username','domain','attempt','time',
+                    'submission','correct', 'grading','awarded','weight',
+                    'score');
+    my $awarded_col = 7;
+    my $weight_col  = 8;
+    #
+    # Create excel worksheet
+    my $filename = '/prtspool/'.
+        $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.
+        time.'_'.rand(1000000000).'.xls';
+    my $workbook  = Spreadsheet::WriteExcel->new('/home/httpd'.$filename);
+    if (! defined($workbook)) {
+        $r->log_error("Error creating excel spreadsheet $filename: $!");
+        $r->print('<p>'.&mt("Unable to create new Excel file.  ".
+                            "This error has been logged.  ".
+                            "Please alert your LON-CAPA administrator").
+                  '</p>');
+        return undef;
+    }
+    #
+    $workbook->set_tempdir('/home/httpd/perl/tmp');
+    #
+    my $format = &Apache::loncommon::define_excel_formats($workbook);
+    my $worksheet  = $workbook->addworksheet('Student Submission Data');
+    #
+    # Make sure we get new weight data instead of data on a 10 minute delay
+    &Apache::lonnet::clear_EXT_cache_status();
+    #
+    # Put on the standard headers and whatnot
+    my $rows_output=0;
+    $worksheet->write($rows_output++,0,$resource->{'title'},$format->{'h1'});
+    $worksheet->write($rows_output++,0,$resource->{'src'},$format->{'h3'});
+    $rows_output++;
+    $worksheet->write_row($rows_output++,0,\@Columns,$format->{'bold'});
+    #
+    # Populate the worksheet with the student data
+    foreach my $student (@$Students) {
+        my $results = &Apache::loncoursedata::get_response_data_by_student
+            ($student,$resource->{'symb'},$respid);
+        my %row;
+        $row{'username'} = $student->{'username'};
+        $row{'domain'}   = $student->{'domain'};
+        $row{'correct'} = $student->{'answer'};
+        $row{'weight'} = &Apache::lonnet::EXT
+            ('resource.'.$partid.'.weight',$resource->{'symb'},
+             undef,undef,undef);
+        if (! defined($results) || ref($results) ne 'ARRAY') {
+            $row{'score'} = '='.
+                &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
+                    ($rows_output,$awarded_col)
+                .'*'.
+                &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
+                    ($rows_output,$weight_col);
+            my $cols_output = 0;
+            foreach my $col (@Columns) {
+                if (! exists($row{$col})) {
+                    $cols_output++;
+                    next;
+                }
+                $worksheet->write($rows_output,$cols_output++,$row{$col});
+            }
+            $rows_output++;
+        } else {
+            foreach my $response (@$results) {
+                delete($row{'time'});
+                delete($row{'attempt'});
+                delete($row{'submission'});
+                delete($row{'awarded'});
+                delete($row{'grading'});
+                delete($row{'score'});
+                my %row_format;
+                #
+                # Time is handled differently
+                $row{'time'} = &calc_serial(
+                     $response->[&Apache::loncoursedata::RDs_timestamp()]);
+                $row_format{'time'}=$format->{'date'};
+                #
+                $row{'attempt'}  = $response->[
+                     &Apache::loncoursedata::RDs_tries()];
+                $row{'submission'} = $response->[
+                     &Apache::loncoursedata::RDs_submission()];
+                $row{'grading'} = $response->[
+                     &Apache::loncoursedata::RDs_awarddetail()];
+                $row{'awarded'} = $response->[
+                     &Apache::loncoursedata::RDs_awarded()];
+                $row{'score'} = '='.
+                    &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
+                        ($rows_output,$awarded_col)
+                    .'*'.
+                    &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
+                        ($rows_output,$weight_col);
+                my $cols_output = 0;
+                foreach my $col (@Columns) {
+                    $worksheet->write($rows_output,$cols_output++,$row{$col},
+                                      $row_format{$col});
+                }
+                $rows_output++;
+            }
+        } # End of else clause on if (! defined($results) ....
+    }
+    #
+    # Close the excel file
+    $workbook->close();
+    #
+    # Write a link to allow them to download it
+    $r->print('<p><a href="'.$filename.'">'.
+              &mt('Your Excel spreadsheet.').
+              '</a></p>'."\n");
+
+}
+
+
+#########################################################
+#########################################################
+##
+##      Numerical Response Routines
+##
+#########################################################
+#########################################################
+sub NumericalResponseAnalysis {
+    my ($r,$problem,$ProblemData,$Students) = @_;
+    $r->print('<h2>This analysis is not yet supported</h2>');
+    my ($resource,$respid) = ($problem->{'resource'},
+                              $problem->{'respid'});
+    my $analysis_html;
+    my $PerformanceData = 
+        &Apache::loncoursedata::get_response_data
+        ($Students,$resource->{'symb'},$respid);
+    if (! defined($PerformanceData) || 
+        ref($PerformanceData) ne 'ARRAY' ) {
+        $analysis_html = '<h2>'.
+            &mt('There is no submission data for this resource').
+            '</h2>';
+        $r->print($analysis_html);
+        return;
+    }
+    my ($max,$min) = &GetStudentAnswers($r,$problem,$Students);
+    $r->print('Maximum = '.$max.' Minimum = '.$min);
+    my $max_students = 0;
+    my %Data;
+    foreach my $student (@$Students) {
+        my $answer = $student->{'answer'};
+        $Data{$answer}++;
+        if ($max_students < $Data{$answer}) {
+            $max_students = $Data{$answer};
+        }
+    }
+    foreach (5,10,20,25,50,75,100,150,200,250,500,1000,1500,2000,2500,5000) {
+        if ($max_students < $_) {
+            $max_students = $_;
+            last;
+        }
+    }
+    my @Labels = sort {$a <=> $b } keys(%Data);
+    $r->print('number of labels = '.scalar(@Labels));
+    my @PlotData = @Data{@Labels};
+    $r->print('number of PlotData = '.scalar(@PlotData));
+    my $graph = 
+        &Apache::loncommon::DrawXYGraph('Correct Answer Distribution',
+                                        'Correct Answer',
+                                        'Number of students',
+                                        $max_students,
+                                        undef,
+                                        \@Labels,
+                                        [\@PlotData],
+                                        (xskip=>10));
+    $r->print($graph);
+    return;
+}
+
+sub GetStudentAnswers {
+    my ($r,$problem,$Students) = @_;
+    my %Answers;
+    my ($resource,$partid,$respid) = ($problem->{'resource'},
+                                      $problem->{'part'},
+                                      $problem->{'respid'});
+    # Open progress window
+    my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
+        ($r,'Student Answer Compilation Status',
+         'Student Answer Compilation Progress', scalar(@$Students));
+    $r->print("<table>\n");
+    $r->rflush();
+    foreach my $student (@$Students) {
+        my $sname = $student->{'username'};
+        my $sdom = $student->{'domain'};
+        my $answer = &analyze_problem_as_student($resource,
+                                                 $sname,$sdom,
+                                                 $partid,$respid);
+        &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
+                                                 &mt('last student'));
+        $student->{'answer'} = $answer;
+    }
+    $r->print("</table>\n");
+    $r->rflush();
+    # close progress window
+    &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
+    return;
+}
+
+sub build_student_data_worksheet {
+    my ($workbook,$format) = @_;
+    my $rows_output = 3;
+    my $cols_output = 0;
+    my $worksheet  = $workbook->addworksheet('Student Data');
+    $worksheet->write($rows_output++,0,'Student Data',$format->{'h3'});
+    my @Headers = ('full name','username','domain','section',
+                   "student\nnumber",'identifier');
+    $worksheet->write_row($rows_output++,0,\@Headers,$format->{'header'});
+    my @Students = @Apache::lonstatistics::Students;
+    my $studentrows = &Apache::loncoursedata::get_student_data(\@Students);
+    my %ids;
+    foreach my $row (@$studentrows) {
+        my ($mysqlid,$student) = @$row;
+        $ids{$student}=$mysqlid;
+    }
+    foreach my $student (@Students) {
+        my $name_domain = $student->{'username'}.':'.$student->{'domain'};
+        $worksheet->write_row($rows_output++,0,
+                          [$student->{'fullname'},
+                           $student->{'username'},$student->{'domain'},
+                           $student->{'section'},$student->{'id'},
+                           $ids{$name_domain}]);
+    }
+    return $worksheet;
+}
+
+#########################################################
+#########################################################
+##
+##      Radio Response Routines
+##
+#########################################################
+#########################################################
+sub RadioResponseAnalysis {
+    my ($r,$problem,$ProblemData,$Students) = @_;
+    my ($resource,$respid) = ($problem->{'resource'},
+                              $problem->{'respid'});
+    my $analysis_html;
+    my $PerformanceData = 
+        &Apache::loncoursedata::get_response_data
+        ($Students,$resource->{'symb'},$respid);
+    if (! defined($PerformanceData) || 
+        ref($PerformanceData) ne 'ARRAY' ) {
+        $analysis_html = '<h2>'.
+            &mt('There is no submission data for this resource').
+            '</h2>';
+        $r->print($analysis_html);
+        return;
+    }
+    if (exists($ENV{'form.ExcelOutput'})) {
+        $analysis_html .= &RR_Excel_output($r,$problem->{'resource'},
+                                           $PerformanceData,$ProblemData);
+    } elsif ($ENV{'form.AnalyzeOver'} eq 'Tries') {
+        $analysis_html .= &RR_Tries_Analysis($r,$problem->{'resource'},
+                                             $PerformanceData,$ProblemData);
+    } elsif ($ENV{'form.AnalyzeOver'} eq 'Time') {
+        $analysis_html .= &RR_Time_Analysis($r,$problem->{'resource'},
+                                            $PerformanceData,$ProblemData);
+    } else {
+        $analysis_html .= '<h2>'.
+           &mt('The analysis you have selected is not supported at this time').
+           '</h2>';
+    }
+    $r->print($analysis_html);
+}
+
+sub RR_Excel_output   { 
+    my ($r,$PerformanceData,$ProblemData) = @_;
+    return '<h1>No!</h1>';
+}
+
+sub RR_Tries_Analysis { 
+    my ($r,$resource,$PerformanceData,$ProblemData) = @_;
+    my $analysis_html;
+    my $mintries = 1;
+    my $maxtries = $ENV{'form.NumPlots'};
+    my ($table,$Foils,$Concepts) = &build_foil_index($ProblemData);
+    if ((! defined($Concepts)) || ((@$Concepts < 2) && 
+                                   ($ENV{'form.AnalyzeAs'} ne 'Foils'))) {
+        $table = '<h3>'.
+            &mt('Not enough data for concept analysis.  '.
+                'Performing Foil Analysis').
+            '</h3>'.$table;
+        $ENV{'form.AnalyzeAs'} = 'Foils';
     }
+    $analysis_html .= $table;
+    my @TryData = &RR_tries_data_analysis($r,$PerformanceData);
+#    if ($ENV{'form.AnalyzeAs'} eq 'Foils') {
+        $analysis_html .= &RR_Tries_Foil_Analysis($mintries,$maxtries,$Foils,
+                                                 \@TryData,$ProblemData);
+#    } else {
+#        $analysis_html = &RR_Tries_Concept_Analysis($mintries,$maxtries,
+#                                                    $Concepts,
+#                                                    \@TryData,
+#                                                    $ProblemData);
+#    }
+    return $analysis_html;
+}
+
+sub RR_tries_data_analysis {
+    my ($r,$Attempt_data) = @_;
+    my @TryData;
+    foreach my $attempt (@$Attempt_data) {
+        my %Attempt = &hashify_attempt($attempt);
+        my ($answer,undef) = split('=',$Attempt{'submission'});
+        $TryData[$Attempt{'tries'}]->{$answer}++;
+    }
+    return @TryData;
+}
+
+sub RR_Time_Analysis  { 
+    my ($r,$PerformanceData,$ProblemData) = @_;
+    my $html;
+    return $html;
+}
+
+sub RR_Tries_Foil_Analysis {
+    my ($min,$max,$Foils,$TryData,$ProblemData) = @_;
+    my $html;
+    #
+    # Compute the data neccessary to make the plots
+    for (my $try=$min;$try<=$max;$try++) {
+        my @PlotData_Correct; 
+        my @PlotData_Incorrect;
+        next if ($try > scalar(@{$TryData}));
+        next if (! defined($TryData->[$try]));
+        my %DataSet = %{$TryData->[$try]};
+        my $total = 0;
+        foreach my $foilid (@$Foils) {
+            $total += $DataSet{$foilid};
+        }
+        foreach my $foilid (@$Foils) {
+            if ($total == 0) {
+                push (@PlotData_Correct,0);
+                push (@PlotData_Incorrect,0);
+            } else {
+                if ($ProblemData->{'_Foils'}->{$foilid}->{'value'} eq 'true') {
+                    push (@PlotData_Correct,
+                          int(100*$DataSet{$foilid}/$total));
+                    push (@PlotData_Incorrect,0);
+                } else {
+                    push (@PlotData_Correct,0);
+                    push (@PlotData_Incorrect,
+                          int(100*$DataSet{$foilid}/$total));
+                }
+            }
+        }
+        my $title='Attempt '.$try;
+        my $xlabel = $total.' Submissions';
+        $html.=  &Apache::loncommon::DrawBarGraph($title,
+                                                  $xlabel,
+                                                  'Percent Choosing',
+                                                  100,
+                                                  ['#33ff00','#ff3300'],
+                                                  undef,
+                                                  \@PlotData_Correct,
+                                                  \@PlotData_Incorrect);
+    }
+    return $html;
+}
+
+sub RR_Tries_Concept_Analysis {
+    my ($min,$max,$Concepts,$ResponseData,$ProblemData) = @_;
+    my $html;
+    return $html;
+}
+
+sub RR_Time_Foil_Analysis {
+    my ($min,$max,$Foils,$ResponseData,$ProblemData) = @_;
+    my $html;
+    return $html;
+}
+
+sub RR_Time_Concept_Analysis {
+    my ($min,$max,$Concepts,$ResponseData,$ProblemData) = @_;
+    my $html;
+    return $html;
+}
+
+
+sub get_Radio_problem_data {
+    my ($url) = @_;
+    my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze'));
+    (my $garbage,$Answ)=split('_HASH_REF__',$Answ,2);
+    my %Answer = &Apache::lonnet::str2hash($Answ);
+    my %Partdata;
+    foreach my $part (@{$Answer{'parts'}}) {
+        while (my($key,$value) = each(%Answer)) {
+#            if (ref($value) eq 'ARRAY') {
+#                &Apache::lonnet::logthis('is ref part:'.$part.' '.$key.'='.join(',',@$value));
+#            } else {
+#                &Apache::lonnet::logthis('notref part:'.$part.' '.$key.'='.$value);
+#            }                
+            next if ($key !~ /^$part/);
+            $key =~ s/^$part\.//;
+            if ($key eq 'foils') {
+                $Partdata{$part}->{'_Foils'}=$value;
+            } elsif ($key eq 'options') {
+                $Partdata{$part}->{'_Options'}=$value;
+            } elsif ($key eq 'shown') {
+                $Partdata{$part}->{'_Shown'}=$value;
+            } elsif ($key =~ /^foil.value.(.*)$/) {
+                $Partdata{$part}->{$1}->{'value'}=$value;
+            } elsif ($key =~ /^foil.text.(.*)$/) {
+                $Partdata{$part}->{$1}->{'text'}=$value;
+            }
+        }
+    }
+    return %Partdata;
 }
 
 #########################################################
@@ -142,34 +619,35 @@ sub BuildProblemAnalysisPage {
 #########################################################
 #########################################################
 sub OptionResponseAnalysis {
-    my ($r,$resource,$resid,$ProblemData,$Students) = @_;
-    &Apache::lonnet::logthis('resid = '.$resid);
+    my ($r,$problem,$ProblemData,$Students) = @_;
+    my ($resource,$respid) = ($problem->{'resource'},
+                              $problem->{'respid'});
+    # Note: part data is not needed.
     my $PerformanceData = 
-        &Apache::loncoursedata::get_optionresponse_data
-        ($Students,$resource->{'symb'},$resid);
+        &Apache::loncoursedata::get_response_data
+        ($Students,$resource->{'symb'},$respid);
     if (! defined($PerformanceData) || 
         ref($PerformanceData) ne 'ARRAY' ) {
         $r->print('<h2>'.
                   &mt('There is no student data for this problem.').
                   '</h2>');
     }  else {
-        $r->print(&render_resource($resource));
         $r->rflush();
         if (exists($ENV{'form.ExcelOutput'})) {
-            my $result = &prepare_optionresponse_excel_sheet($r,$resource,
-                                                             $PerformanceData,
-                                                             $ProblemData);
+            my $result = &OR_excel_sheet($r,$resource,
+                                         $PerformanceData,
+                                         $ProblemData);
             $r->print($result);
             $r->rflush();
         } else {
             if ($ENV{'form.AnalyzeOver'} eq 'Tries') {
-                my $analysis_html = &tries_analysis($r,
+                my $analysis_html = &OR_tries_analysis($r,
                                                     $PerformanceData,
                                                     $ProblemData);
                 $r->print($analysis_html);
                 $r->rflush();
             } elsif ($ENV{'form.AnalyzeOver'} eq 'Time') {
-                my $analysis_html = &time_analysis($PerformanceData,
+                my $analysis_html = &OR_time_analysis($PerformanceData,
                                                    $ProblemData);
                 $r->print($analysis_html);
                 $r->rflush();
@@ -188,7 +666,7 @@ sub OptionResponseAnalysis {
 #       Option Response:  Tries Analysis
 #
 #########################################################
-sub tries_analysis {
+sub OR_tries_analysis {
     my ($r,$PerformanceData,$ORdata) = @_;
     my $mintries = 1;
     my $maxtries = $ENV{'form.NumPlots'};
@@ -200,21 +678,21 @@ sub tries_analysis {
             '</h3>'.$table;
         $ENV{'form.AnalyzeAs'} = 'Foils';
     }
-    my %ResponseData = &analyze_option_data_by_tries($r,$PerformanceData,
+    my %ResponseData = &OR_analyze_by_tries($r,$PerformanceData,
                                                      $mintries,$maxtries);
     my $analysis = '';
     if ($ENV{'form.AnalyzeAs'} eq 'Foils') {
-        $analysis = &Tries_Foil_Analysis($mintries,$maxtries,$Foils,
+        $analysis = &OR_Tries_Foil_Analysis($mintries,$maxtries,$Foils,
                                          \%ResponseData,$ORdata);
     } else {
-        $analysis = &Tries_Concept_Analysis($mintries,$maxtries,
+        $analysis = &OR_Tries_Concept_Analysis($mintries,$maxtries,
                                             $Concepts,\%ResponseData,$ORdata);
     }
     $table .= $analysis;
     return $table;
 }
 
-sub Tries_Foil_Analysis {
+sub OR_Tries_Foil_Analysis {
     my ($mintries,$maxtries,$Foils,$respdat,$ORdata) = @_;
     my %ResponseData = %$respdat;
     #
@@ -229,7 +707,7 @@ sub Tries_Foil_Analysis {
                      100*$ResponseData{$foilid}->[$i]->{'_correct'}/
                      $ResponseData{$foilid}->[$i]->{'_total'});
             }
-            foreach my $option (@{$ORdata->{'Options'}}) {
+            foreach my $option (@{$ORdata->{'_Options'}}) {
                 push(@{$PlotData[$i]->{'_total'}},
                      $ResponseData{$foilid}->[$i]->{'_total'});
                 if ($ResponseData{$foilid}->[$i]->{'_total'} == 0) {
@@ -263,16 +741,17 @@ sub Tries_Foil_Analysis {
         }
         my $title = 'Attempt '.$i.', '.$count;
         my @Datasets;
-        foreach my $option ('_correct',@{$ORdata->{'Options'}}) {
+        foreach my $option ('_correct',@{$ORdata->{'_Options'}}) {
             next if (! exists($PlotData[$i]->{$option}));
             push(@Datasets,$PlotData[$i]->{$option});
         }
         my $correctgraph = &Apache::loncommon::DrawBarGraph
             ($title,'Foil Number','Percent Correct',
-             100,$plotcolors,$Datasets[0]);
+             100,$plotcolors,undef,$Datasets[0]);
         $analysis_html.= '<tr><td>'.$correctgraph.'</td>';
         ##
         ##
+        next if (! defined($Datasets[0]));
         for (my $i=0; $i< scalar(@{$Datasets[0]});$i++) {
             $Datasets[0]->[$i]=0;
         }
@@ -287,7 +766,7 @@ sub Tries_Foil_Analysis {
         $title = 'Attempt '.$i.', '.$count;
         my $incorrectgraph = &Apache::loncommon::DrawBarGraph
             ($title,'Foil Number','% Option Chosen Incorrectly',
-             100,$plotcolors,@Datasets);
+             100,$plotcolors,undef,@Datasets);
         $analysis_html.= '<td>'.$incorrectgraph.'</td>';
         $analysis_html.= '<td>'.$foilkey."<td></tr>\n";
     }
@@ -295,7 +774,7 @@ sub Tries_Foil_Analysis {
     return $analysis_html;
 }
 
-sub Tries_Concept_Analysis {
+sub OR_Tries_Concept_Analysis {
     my ($mintries,$maxtries,$Concepts,$respdat,$ORdata) = @_;
     my %ResponseData = %$respdat;
     my $analysis_html = "<table>\n";
@@ -354,21 +833,21 @@ sub Tries_Concept_Analysis {
         $title = 'Attempt '.$i.', '.$count;
         my $graphlink = &Apache::loncommon::DrawBarGraph
             ($title,'Concept Number','Percent Correct',
-             100,$plotcolors,$PlotData[$i]->{'_correct'});
+             100,$plotcolors,undef,$PlotData[$i]->{'_correct'});
         $analysis_html.= '<tr><td>'.$graphlink."</td></tr>\n";
     }
     $analysis_html .= "</table>\n";
     return $analysis_html;
 }
 
-sub analyze_option_data_by_tries {
+sub OR_analyze_by_tries {
     my ($r,$PerformanceData,$mintries,$maxtries) = @_;
     my %Trydata;
     $mintries = 1         if (! defined($mintries) || $mintries < 1);
     $maxtries = $mintries if (! defined($maxtries) || $maxtries < $mintries);
     foreach my $row (@$PerformanceData) {
         next if (! defined($row));
-        my $tries = &get_tries_from_OR_row($row);
+        my $tries = &get_tries_from_row($row);
         my %Row   = &Process_OR_Row($row);
         next if (! %Row);
         while (my ($foilid,$href) = each(%Row)) {
@@ -389,7 +868,7 @@ sub analyze_option_data_by_tries {
 #     Option Response: Time Analysis
 #
 #########################################################
-sub time_analysis {
+sub OR_time_analysis {
     my ($PerformanceData,$ORdata) = @_;
     my ($table,$Foils,$Concepts) = &build_foil_index($ORdata);
     if ((@$Concepts < 2) && ($ENV{'form.AnalyzeAs'} ne 'Foils')) {
@@ -412,14 +891,14 @@ sub time_analysis {
             ('enddate_'.$i);
         if (! defined($starttime) || ! defined($endtime)) {
             my $sec_in_day = 86400;
-            my $last_sub_time = &get_time_from_OR_row($PerformanceData->[-1]);
+            my $last_sub_time = &get_time_from_row($PerformanceData->[-1]);
             my ($sday,$smon,$syear);
             (undef,undef,undef,$sday,$smon,$syear) = 
                 localtime($last_sub_time - $sec_in_day*$i);
             $starttime = &Time::Local::timelocal(0,0,0,$sday,$smon,$syear);
             $endtime = $starttime + $sec_in_day;
             if ($i == ($num_plots -1 )) {
-                $starttime = &get_time_from_OR_row($PerformanceData->[0]);
+                $starttime = &get_time_from_row($PerformanceData->[0]);
             }
         }
         my $startdateform = &Apache::lonhtmlcommon::date_setter
@@ -431,12 +910,12 @@ sub time_analysis {
         my $end_index;
         my $j;
         while (++$j < scalar(@$PerformanceData)) {
-            last if (&get_time_from_OR_row($PerformanceData->[$j]) 
+            last if (&get_time_from_row($PerformanceData->[$j]) 
                                                               > $starttime);
         }
         $begin_index = $j;
         while (++$j < scalar(@$PerformanceData)) {
-            last if (&get_time_from_OR_row($PerformanceData->[$j]) > $endtime);
+            last if (&get_time_from_row($PerformanceData->[$j]) > $endtime);
         }
         $end_index = $j;
         ##
@@ -447,10 +926,10 @@ sub time_analysis {
             enddateform   => $enddateform,
         };
         if ($ENV{'form.AnalyzeAs'} eq 'Foils') {
-            $table .= &Foil_Time_Analysis($PerformanceData,$ORdata,$Foils,
+            $table .= &OR_Foil_Time_Analysis($PerformanceData,$ORdata,$Foils,
                                           $interval);
         } else {
-            $table .= &Concept_Time_Analysis($PerformanceData,$ORdata,
+            $table .= &OR_Concept_Time_Analysis($PerformanceData,$ORdata,
                                              $Concepts,$interval);
         }
     }
@@ -458,7 +937,7 @@ sub time_analysis {
     return $table;
 }
 
-sub Foil_Time_Analysis {
+sub OR_Foil_Time_Analysis {
     my ($PerformanceData,$ORdata,$Foils,$interval) = @_;
     my $analysis_html;
     my $foilkey = &build_option_index($ORdata);
@@ -492,7 +971,7 @@ sub Foil_Time_Analysis {
         }
         my $total_incorrect = $total - $TimeData{$foil}->{'_correct'};
         my $optionidx = 1;
-        foreach my $option (@{$ORdata->{'Options'}}) {
+        foreach my $option (@{$ORdata->{'_Options'}}) {
             if ($total_incorrect == 0) {
                 push(@{$Plotdata[$optionidx]},0);
             } else {
@@ -519,6 +998,7 @@ sub Foil_Time_Analysis {
                                                        'Percent Correct',
                                                        100,
                                                        $plotcolors,
+                                                       undef,
                                                        $Plotdata[0]);
     for (my $j=0; $j< scalar(@{$Plotdata[0]});$j++) {
         $Plotdata[0]->[$j]=0;
@@ -536,6 +1016,7 @@ sub Foil_Time_Analysis {
                                                  'Incorrect Option Choice',
                                                  100,
                                                  $plotcolors,
+                                                 undef,
                                                  @Plotdata);        
     $analysis_html.='<tr>'.
         '<td>'.$correctplot.'</td>'.
@@ -553,7 +1034,7 @@ sub Foil_Time_Analysis {
     return $analysis_html;
 }
 
-sub Concept_Time_Analysis {
+sub OR_Concept_Time_Analysis {
     my ($PerformanceData,$ORdata,$Concepts,$interval) = @_;
     my $analysis_html;
     ##
@@ -600,6 +1081,7 @@ sub Concept_Time_Analysis {
                                                     'Percent Correct',
                                                     100,
                                                     $plotcolors,
+                                                    undef,
                                                     \@Plotdata);
     $analysis_html.='<tr>'.
         '<td>'.$correctplot.'</td>'.
@@ -621,7 +1103,7 @@ sub Concept_Time_Analysis {
 ##
 #########################################################
 #########################################################
-sub prepare_optionresponse_excel_sheet {
+sub OR_excel_sheet {
     my ($r,$resource,$PerformanceData,$ORdata) = @_;
     my $response = '';
     my (undef,$Foils,$Concepts) = &build_foil_index($ORdata);
@@ -641,22 +1123,11 @@ sub prepare_optionresponse_excel_sheet {
     }
     #
     $workbook->set_tempdir('/home/httpd/perl/tmp');
-    #
-    # Define some potentially useful formats
-    my $format;
-    $format->{'header'} = $workbook->add_format(bold      => 1, 
-                                                bottom    => 1,
-                                                align     => 'center');
-    $format->{'bold'} = $workbook->add_format(bold=>1);
-    $format->{'h1'}   = $workbook->add_format(bold=>1, size=>18);
-    $format->{'h2'}   = $workbook->add_format(bold=>1, size=>16);
-    $format->{'h3'}   = $workbook->add_format(bold=>1, size=>14);
-    $format->{'date'} = $workbook->add_format(num_format=>
-                                              'mmm d yyyy hh:mm AM/PM');
+    my $format = &Apache::loncommon::define_excel_formats($workbook);
     #
     # Create and populate main worksheets
     my $problem_data_sheet  = $workbook->addworksheet('Problem Data');
-    my $student_data_sheet  = $workbook->addworksheet('Student Data');
+    my $student_data_sheet = &build_student_data_worksheet($workbook,$format);
     my $response_data_sheet = $workbook->addworksheet('Response Data');
     foreach my $sheet ($problem_data_sheet,$student_data_sheet,
                        $response_data_sheet) {
@@ -665,16 +1136,12 @@ sub prepare_optionresponse_excel_sheet {
     }
     #
     my $result;
-    $result = &build_problem_data_worksheet($problem_data_sheet,$format,
+    $result = &OR_build_problem_data_worksheet($problem_data_sheet,$format,
                                             $Concepts,$ORdata);
     if ($result ne 'okay') {
         # Do something useful
     }
-    $result = &build_student_data_worksheet($student_data_sheet,$format);
-    if ($result ne 'okay') {
-        # Do something useful
-    }
-    $result = &build_response_data_worksheet($response_data_sheet,$format,
+    $result = &OR_build_response_data_worksheet($response_data_sheet,$format,
                                              $PerformanceData,$Foils,
                                              $ORdata);
     if ($result ne 'okay') {
@@ -693,7 +1160,7 @@ sub prepare_optionresponse_excel_sheet {
     return $result;
 }
 
-sub build_problem_data_worksheet {
+sub OR_build_problem_data_worksheet {
     my ($worksheet,$format,$Concepts,$ORdata) = @_;
     my $rows_output = 3;
     my $cols_output = 0;
@@ -708,7 +1175,7 @@ sub build_problem_data_worksheet {
         @Headers = ('Foil Number','FoilName','Foil Text','Correct value');
     }
     $worksheet->write_row($rows_output++,0,\@Headers,$format->{'header'});
-    my %Foildata = %{$ORdata->{'Foils'}};
+    my %Foildata = %{$ORdata->{'_Foils'}};
     my $conceptindex = 1;
     my $foilindex = 1;
     foreach my $concept (@$Concepts) {
@@ -756,39 +1223,13 @@ sub build_problem_data_worksheet {
     ##
     ## Option data output
     $worksheet->write($rows_output++,0,'Options',$format->{'header'});
-    foreach my $string (@{$ORdata->{'Options'}}) {
+    foreach my $string (@{$ORdata->{'_Options'}}) {
         $worksheet->write($rows_output++,0,$string);
     }
     return 'okay';
 }
 
-sub build_student_data_worksheet {
-    my ($worksheet,$format) = @_;
-    my $rows_output = 3;
-    my $cols_output = 0;
-    $worksheet->write($rows_output++,0,'Student Data',$format->{'h3'});
-    my @Headers = ('full name','username','domain','section',
-                   "student\nnumber",'identifier');
-    $worksheet->write_row($rows_output++,0,\@Headers,$format->{'header'});
-    my @Students = @Apache::lonstatistics::Students;
-    my $studentrows = &Apache::loncoursedata::get_student_data(\@Students);
-    my %ids;
-    foreach my $row (@$studentrows) {
-        my ($mysqlid,$student) = @$row;
-        $ids{$student}=$mysqlid;
-    }
-    foreach my $student (@Students) {
-        my $name_domain = $student->{'username'}.':'.$student->{'domain'};
-        $worksheet->write_row($rows_output++,0,
-                          [$student->{'fullname'},
-                           $student->{'username'},$student->{'domain'},
-                           $student->{'section'},$student->{'id'},
-                           $ids{$name_domain}]);
-    }
-    return;
-}
-
-sub build_response_data_worksheet {
+sub OR_build_response_data_worksheet {
     my ($worksheet,$format,$PerformanceData,$Foils,$ORdata)=@_;
     my $rows_output = 3;
     my $cols_output = 0;
@@ -1013,12 +1454,12 @@ sub _adjustment {
 
 sub build_foil_index {
     my ($ORdata) = @_;
-    return if (! exists($ORdata->{'Foils'}));
-    my %Foildata = %{$ORdata->{'Foils'}};
+    return if (! exists($ORdata->{'_Foils'}));
+    my %Foildata = %{$ORdata->{'_Foils'}};
     my @Foils = sort(keys(%Foildata));
     my %Concepts;
     foreach my $foilid (@Foils) {
-        push(@{$Concepts{$Foildata{$foilid}->{'Concept'}}},
+        push(@{$Concepts{$Foildata{$foilid}->{'_Concept'}}},
              $foilid);
     }
     undef(@Foils);
@@ -1038,16 +1479,24 @@ sub build_foil_index {
                        ten   => 10,);
         my $a1 = lc($a); 
         my $b1 = lc($b);
-        if (exists($Numbers{$a})) {
-            $a1 = $Numbers{$a};
+        if (exists($Numbers{$a1})) {
+            $a1 = $Numbers{$a1};
+        }
+        if (exists($Numbers{$b1})) {
+            $b1 = $Numbers{$b1};
         }
-        if (exists($Numbers{$b})) {
-            $b1 = $Numbers{$b};
+        if (($a1 =~/^\d+$/) && ($b1 =~/^\d+$/)) {
+            return $a1 <=> $b1;
+        } else {
+            return $a1 cmp $b1;
         }
-        $a1 cmp $b1;
     };
     my @Concepts;
     foreach my $concept (sort $sortfunction (keys(%Concepts))) {
+        if (! defined($Concepts{$concept})) {
+            $Concepts{$concept}=[];
+#            next;
+        }
         push(@Concepts,{ name => $concept,
                         foils => [@{$Concepts{$concept}}]});
         push(@Foils,(@{$Concepts{$concept}}));
@@ -1080,18 +1529,18 @@ sub build_foil_index {
         if (@Concepts > 1) {
             $table .= '<tr>'.
                 '<td>'.$conceptindex.'</td>'.
-                '<td>'.$concept->{'name'}.'</td>'.
+                '<td>'.&HTML::Entities::encode($concept->{'name'}).'</td>'.
                 '<td>'.$foilindex++.'</td>'.
-                '<td>'.$Foildata{$firstfoil}->{'name'}.'</td>'.
+                '<td>'.&HTML::Entities::encode($Foildata{$firstfoil}->{'name'}).'</td>'.
                 '<td>'.$Foildata{$firstfoil}->{'text'}.'</td>'.
-                '<td>'.$Foildata{$firstfoil}->{'value'}.'</td>'.
+                '<td>'.&HTML::Entities::encode($Foildata{$firstfoil}->{'value'}).'</td>'.
                 "</tr>\n";
         } else {
             $table .= '<tr>'.
                 '<td>'.$foilindex++.'</td>'.
-                '<td>'.$Foildata{$firstfoil}->{'name'}.'</td>'.
+                '<td>'.&HTML::Entities::encode($Foildata{$firstfoil}->{'name'}).'</td>'.
                 '<td>'.$Foildata{$firstfoil}->{'text'}.'</td>'.
-                '<td>'.$Foildata{$firstfoil}->{'value'}.'</td>'.
+                '<td>'.&HTML::Entities::encode($Foildata{$firstfoil}->{'value'}).'</td>'.
                 "</tr>\n";
         }
         foreach my $foilid (@FoilsInConcept) {
@@ -1100,16 +1549,16 @@ sub build_foil_index {
                     '<td></td>'.
                     '<td></td>'.
                     '<td>'.$foilindex.'</td>'.
-                    '<td>'.$Foildata{$foilid}->{'name'}.'</td>'.
+                    '<td>'.&HTML::Entities::encode($Foildata{$foilid}->{'name'}).'</td>'.
                     '<td>'.$Foildata{$foilid}->{'text'}.'</td>'.
-                    '<td>'.$Foildata{$foilid}->{'value'}.'</td>'.
+                    '<td>'.&HTML::Entities::encode($Foildata{$foilid}->{'value'}).'</td>'.
                     "</tr>\n";
             } else {
                 $table .= '<tr>'.
                     '<td>'.$foilindex.'</td>'.
-                    '<td>'.$Foildata{$foilid}->{'name'}.'</td>'.
+                    '<td>'.&HTML::Entities::encode($Foildata{$foilid}->{'name'}).'</td>'.
                     '<td>'.$Foildata{$foilid}->{'text'}.'</td>'.
-                    '<td>'.$Foildata{$foilid}->{'value'}.'</td>'.
+                    '<td>'.&HTML::Entities::encode($Foildata{$foilid}->{'value'}).'</td>'.
                     "</tr>\n";
             }                
         } continue {
@@ -1129,12 +1578,12 @@ sub build_option_index {
     my $table = "<table>\n";
     my $optionindex = 0;
     my @Rows;
-    foreach my $option (&mt('correct option chosen'),@{$ORdata->{'Options'}}) {
+    foreach my $option (&mt('correct option chosen'),@{$ORdata->{'_Options'}}) {
         push (@Rows,
               '<tr>'.
               '<td bgcolor="'.$plotcolors->[$optionindex++].'">'.
               ('&nbsp;'x4).'</td>'.
-              '<td>'.$option.'</td>'.
+              '<td>'.&HTML::Entities::encode($option).'</td>'.
               "</tr>\n");
     }
     shift(@Rows); # Throw away 'correct option chosen' color
@@ -1192,6 +1641,8 @@ sub CreateInterface {
     { # These braces are here to organize the code, not scope it.
         {
             $Str .= '<nobr>'.&mt('Analyze Over ');
+            $Str .= &Apache::loncommon::help_open_topic
+                                                  ('Analysis_Analyze_Over');
             $Str .='<select name="AnalyzeOver" >';
             $Str .= '<option value="Tries" ';
             if (! exists($ENV{'form.AnalyzeOver'}) || 
@@ -1203,10 +1654,13 @@ sub CreateInterface {
             $Str .= '<option value="Time" ';
             $Str .= ' selected ' if ($ENV{'form.AnalyzeOver'} eq 'Time');
             $Str .= '>'.&mt('Time').'</option>';
-            $Str .= '</select></nobr><br />';
+            $Str .= '</select>';
+            $Str .= '</nobr><br />';
         }
         {
             $Str .= '<nobr>'.&mt('Analyze as ');
+            $Str .= &Apache::loncommon::help_open_topic
+                                                  ('Analysis_Analyze_as');
             $Str .='<select name="AnalyzeAs" >';
             $Str .= '<option value="Concepts" ';
             if (! exists($ENV{'form.AnalyzeAs'}) || 
@@ -1222,6 +1676,8 @@ sub CreateInterface {
         }
         {
             $Str .= '<br /><nobr>'.&mt('Number of Plots:');
+            $Str .= &Apache::loncommon::help_open_topic
+                                                  ('Analysis_num_plots');
             $Str .= '<select name="NumPlots">';
             if (! exists($ENV{'form.NumPlots'}) 
                 || $ENV{'form.NumPlots'} < 1 
@@ -1244,95 +1700,48 @@ sub CreateInterface {
     return $Str;
 }
 
-sub ProblemSelector {
-    my $Str;
-    $Str = "\n<table>\n";
-    foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
-        next if ($seq->{'num_assess'}<1);
-        my $seq_str = '';
-        foreach my $res (@{$seq->{'contents'}}) {
-            next if ($res->{'type'} ne 'assessment');
-            foreach my $part (@{$res->{'parts'}}) {
-                my $partdata = $res->{'partdata'}->{$part};
-                if (! exists($partdata->{'option'}) || 
-                    $partdata->{'option'} == 0) {
-                    next;
-                }
-                for (my $i=0;$i<scalar(@{$partdata->{'ResponseTypes'}});$i++){
-                    my $respid = $partdata->{'ResponseIds'}->[$i];
-                    my $resptype = $partdata->{'ResponseTypes'}->[$i];
-                    if ($resptype eq 'option') {
-                        my $value = &Apache::lonnet::escape($res->{'symb'}.':'.$part.':'.$respid);
-                        my $checked = '';
-                        if ($ENV{'form.problemchoice'} eq $value) {
-                            $checked = 'checked ';
-                        }
-                        $seq_str .= '<tr><td>'.
-  '<input type="radio" name="problemchoice" value="'.$value.'" '.$checked.'/>'.
-  '</td><td>'.
-  '<a href="'.$res->{'src'}.'">'.$res->{'title'}.'</a> ';
-                        if ($partdata->{'option'} > 1) {
-                            $seq_str .= &mt('response').' '.$respid;
-                        }
-                        $seq_str .= "</td></tr>\n";
-                    }
-                }
-            }
-        }
-        if ($seq_str ne '') {
-            $Str .= '<tr><td>&nbsp</td><td><b>'.$seq->{'title'}.'</b></td>'.
-                "</tr>\n".$seq_str;
-        }
-    }
-    $Str .= "</table>\n";
-    return $Str;
-}
-
 #########################################################
 #########################################################
 ##
-##              Misc functions
+##              Misc Option Response functions
 ##
 #########################################################
 #########################################################
-sub get_problem_symb {
-    my $problemstring = shift();
-    my ($symb,$partid,$resid) = ($problemstring=~ /^(.*):([^:]*):([^:]*)$/);
-    return ($symb,$partid,$resid);
-}
-
-sub get_resource_from_symb {
-    my ($symb) = @_;
-    foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
-        foreach my $res (@{$seq->{'contents'}}) {
-            if ($res->{'symb'} eq $symb) {
-                return $res;
-            }
-        }
-    }
-    return undef;
-}
-
-sub get_time_from_OR_row {
+sub get_time_from_row {
     my ($row) = @_;
     if (ref($row)) {
-        return $row->[4];
+        return $row->[&Apache::loncoursedata::RD_timestamp()];
     } 
     return undef;
 }
 
-sub get_tries_from_OR_row {
+sub get_tries_from_row {
     my ($row) = @_;
     if (ref($row)) {
-        return $row->[5];
+        return $row->[&Apache::loncoursedata::RD_tries()];
     }
     return undef;
 }
 
+sub hashify_attempt {
+    my ($row) = @_;
+    my %attempt;
+    $attempt{'tries'}      = $row->[&Apache::loncoursedata::RD_tries()];
+    $attempt{'submission'} = $row->[&Apache::loncoursedata::RD_submission()];
+    $attempt{'award'}      = $row->[&Apache::loncoursedata::RD_awarddetail()];
+    $attempt{'timestamp'}  = $row->[&Apache::loncoursedata::RD_timestamp()];
+    return %attempt;
+}
+
 sub Process_OR_Row {
     my ($row) = @_;
     my %RowData;
-    my ($student_id,$award,$grading,$submission,$time,$tries) = @$row;
+    my $student_id = $row->[&Apache::loncoursedata::RD_student_id()];
+    my $award      = $row->[&Apache::loncoursedata::RD_awarddetail()];
+    my $grading    = $row->[&Apache::loncoursedata::RD_response_eval()];
+    my $submission = $row->[&Apache::loncoursedata::RD_submission()];
+    my $time       = $row->[&Apache::loncoursedata::RD_timestamp()];
+    my $tries      = $row->[&Apache::loncoursedata::RD_tries()];
     return undef if ($award eq 'MISSING_ANSWER');
     if ($award =~ /(APPROX_ANS|EXACT_ANS)/) {
         $RowData{'_correct'} = 1;
@@ -1342,6 +1751,7 @@ sub Process_OR_Row {
     my @Foilsubs   = split('&',$submission);
     for (my $j=0;$j<=$#Foilgrades;$j++) {
         my ($foilid,$correct)  = split('=',$Foilgrades[$j]);
+        $foilid = &Apache::lonnet::unescape($foilid);
         my (undef,$submission) = split('=',$Foilsubs[$j]);
         if ($correct) {
             $RowData{$foilid}->{'_correct'}++;
@@ -1354,6 +1764,27 @@ sub Process_OR_Row {
     return %RowData;
 }
 
+
+sub analyze_problem_as_student {
+    my ($resource,$sname,$sdom,$partid,$respid) = @_;
+    my $url = $resource->{'src'};
+    my $symb = $resource->{'symb'};
+    my $courseid = $ENV{'request.course.id'};
+    my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze',
+                                        'grade_domain' => $sdom,
+                                        'grade_username' => $sname,
+                                        'grade_symb' => $symb,
+                                        'grade_courseid' => $courseid));
+    (my $garbage,$Answ)=split(/_HASH_REF__/,$Answ,2);
+    my %Answer=&Apache::lonnet::str2hash($Answ);
+    my $key = $partid.'.'.$respid.'.answer';
+    my $student_answer = $Answer{$key}->[0];
+    if (! defined($student_answer)) {
+        $student_answer = $Answer{$key}->[1];
+    }
+    return ($student_answer);
+}
+
 ##
 ## get problem data and put it into a useful data structure.
 ## note: we must force each foil and option to not begin or end with
@@ -1368,29 +1799,42 @@ sub get_problem_data {
     my %Partdata;
     foreach my $part (@{$Answer{'parts'}}) {
         while (my($key,$value) = each(%Answer)) {
+            #
+            # Logging code:
+            if (0) {
+                &Apache::lonnet::logthis($part.' got key "'.$key.'"');
+                if (ref($value) eq 'ARRAY') {
+                    &Apache::lonnet::logthis('    '.join(',',@$value));
+                } else {
+                    &Apache::lonnet::logthis('    '.$value);
+                }
+            }
+            # End of logging code
             next if ($key !~ /^$part/);
             $key =~ s/^$part\.//;
             if (ref($value) eq 'ARRAY') {
                 if ($key eq 'options') {
-                    $Partdata{$part}->{'Options'}=$value;
+                    $Partdata{$part}->{'_Options'}=$value;
                 } elsif ($key eq 'concepts') {
-                    $Partdata{$part}->{'Concepts'}=$value;
+                    $Partdata{$part}->{'_Concepts'}=$value;
                 } elsif ($key =~ /^concept\.(.*)$/) {
                     my $concept = $1;
                     foreach my $foil (@$value) {
-                        $Partdata{$part}->{'Foils'}->{$foil}->{'Concept'}=
+                        $Partdata{$part}->{'_Foils'}->{$foil}->{'_Concept'}=
                                                                       $concept;
                     }
+                } elsif ($key =~ /^(incorrect|answer|ans_low|ans_high)$/) {
+                    $Partdata{$part}->{$key}=$value;
                 }
             } else {
                 if ($key=~ /^foil\.text\.(.*)$/) {
                     my $foil = $1;
-                    $Partdata{$part}->{'Foils'}->{$foil}->{'name'}=$foil;
+                    $Partdata{$part}->{'_Foils'}->{$foil}->{'name'}=$foil;
                     $value =~ s/(\s*$|^\s*)//g;
-                    $Partdata{$part}->{'Foils'}->{$foil}->{'text'}=$value;
+                    $Partdata{$part}->{'_Foils'}->{$foil}->{'text'}=$value;
                 } elsif ($key =~ /^foil\.value\.(.*)$/) {
                     my $foil = $1;
-                    $Partdata{$part}->{'Foils'}->{$foil}->{'value'}=$value;
+                    $Partdata{$part}->{'_Foils'}->{$foil}->{'value'}=$value;
                 }
             }
         }