--- loncom/interface/lonstatistics.pm 2002/07/17 12:53:00 1.27 +++ loncom/interface/lonstatistics.pm 2003/10/21 20:24:52 1.87 @@ -1,7 +1,6 @@ # The LearningOnline Network with CAPA -# (Publication Handler # -# $Id: lonstatistics.pm,v 1.27 2002/07/17 12:53:00 stredwic Exp $ +# $Id: lonstatistics.pm,v 1.87 2003/10/21 20:24:52 matthew Exp $ # # Copyright Michigan State University Board of Trustees # @@ -26,1794 +25,1079 @@ # http://www.lon-capa.org/ # # (Navigate problems for statistical reports -# YEAR=2001 -# 5/5,7/9,7/25/1,8/11,9/13,9/26,10/5,10/9,10/22,10/26 Behrouz Minaei -# 11/1,11/4,11/16,12/14,12/16,12/18,12/20,12/31 Behrouz Minaei -# YEAR=2002 -# 1/22,2/1,2/6,2/25,3/2,3/6,3/17,3/21,3/22,3/26,4/7,5/6 Behrouz Minaei -# 5/12,5/14,5/15,5/19,5/26 Behrouz Minaei # ### -package Apache::lonstatistics; +=pod + +=head1 NAME + +lonstatistics -use strict; +=head1 SYNOPSIS + +Main handler for statistics and chart. + +=head1 PACKAGES USED + + use strict; + use Apache::Constants qw(:common :http); + use Apache::lonnet(); + use Apache::lonhomework; + use Apache::loncommon; + use Apache::loncoursedata; + use Apache::lonhtmlcommon; + use Apache::lonproblemanalysis; + use Apache::lonproblemstatistics; + use Apache::lonstudentassessment; + use Apache::lonpercentage; + use Apache::lonmysql; +=over 4 + +=cut + +package Apache::lonstatistics; + +use strict; use Apache::Constants qw(:common :http); +use vars qw( + @FullClasslist + @Students + @Sections + @SelectedSections + %StudentData + @StudentDataOrder + @SelectedStudentData + $top_map + @Sequences + @SelectedMaps + @Assessments); + use Apache::lonnet(); use Apache::lonhomework; use Apache::loncommon; use Apache::loncoursedata; -use HTML::TokeParser; -use GDBM_File; +use Apache::lonhtmlcommon; +use Apache::lonproblemanalysis(); +use Apache::lonproblemstatistics(); +use Apache::lonstudentassessment(); +use Apache::lonpercentage; +use Apache::lonmysql; +use Apache::lonlocal; +use Time::HiRes; -# -------------------------------------------------------------- Module Globals -my %hash; -my %CachData; -my %GraphDat; -my %mapsort; -my $Pos; -my $r; -my $GData; -my %color; -my %foil_to_concept; -my @Concepts; -my %ConceptData; -my %Answer = (); - -sub Activity { - my $file="/home/minaeibi/activity.log"; - my $userid='adamsde1'; - $r->print("
Using $file"); - $r->rflush(); - open(FILEID, "<$file"); - my $line; - my @allaccess; - my $Count=0; - while ($line=) { - my ($time,$machine,$what)=split(':',$line); - $what=&Apache::lonnet::unescape($what); - my @accesses=split('&',$what); - foreach my $access (@accesses) { - my ($date,$resource,$who,$domain,$post,@posts)=split(':',$access); - if ($who ne $userid) { next; } - if (!$resource) { next; } - my $res=&Apache::lonnet::unescape($resource); - if (($res =~ /\.(problem|htm|html)/)) { - $Count++; - $r->print("
$Count) ".localtime($date).": $who --> $res"); -# if ($post) { -# $Count++; -# $r->print("
$Count) Sent data ".join(':', -# &Apache::lonnet::unescape(@posts)).''); -# } - $r->rflush(); - } - ## push (@allaccess,unescape($access)); - #print $machine; - } - } -# @allaccess=sort(@allaccess); -# $Count=0; -# foreach my $access (@allaccess) { -# my ($date,$resource,$who,$domain,$post,@posts)=split(':',$access); -# $Count++; -# $r->print("
$Count) $date: $who --> $resource"); -# $r->rflush(); -# if ($post) { -# $r->print("
Sent data ".join(':',unescape(@posts)).''); -# } -# } -} - -#---- Analyze Web Page --------------------------------------------------- - -sub InitAnalysis { - my ($uri,$part,$problem,$student,$courseID)=@_; - my ($username,$userdomain)=split(/\:/,$student); - - # Render the student's view of the problem. $Answ is the problem - # Stringafied - my $Answ=&Apache::lonnet::ssi($uri,('grade_target' => 'analyze', - 'grade_username' => $username, - 'grade_domain' => $userdomain, - 'grade_courseid' => $courseID, - 'grade_symb' => $problem)); -# my $Answ=&Apache::lonnet::ssi($uri,('grade_target' => 'analyze')); - -# (undef,$Answ)=split(/_HASH_REF__/,$Answ,2); - %Answer=(); - %Answer=&Apache::lonnet::str2hash($Answ); - -# foreach (sort(keys(%Answer))) { -# $r->print($_.' '.$Answer{$_}.'
'); -# } - - my $parts=''; - foreach my $elm (@{$Answer{"parts"}}) { - $parts.="$elm,"; - } - chop($parts); - my $conc=''; - foreach my $elm (@{$Answer{"$parts.concepts"}}) { - $conc.="$elm@"; - } - chop($conc); - - @Concepts=split(/\@/,$conc); - foreach my $concept (@{$Answer{"$parts.concepts"}}) { - foreach my $foil (@{$Answer{"$parts.concept.$concept"}}) { - $foil_to_concept{$foil} = $concept; - #$ConceptData{$foil} = $Answer{"$parts.foil.value.$foil"}; - } - } +####################################################### +####################################################### - return; -} +=pod -sub Interval { - my ($part,$symb)=@_; - my $interval=$ConceptData{"Interval"}; - my $due = &Apache::lonnet::EXT('resource.'.$part.'.duedate',$symb)+1; - my $open = &Apache::lonnet::EXT('resource.'.$part.'.opendate',$symb); - my $add=int(($due-$open)/$interval); - $ConceptData{'Interval.0'}=$open; - for (my $i=1;$i<$interval;$i++) { - $ConceptData{'Interval.'.$i}=$open+$i*$add; - } - $ConceptData{'Interval.'.$interval}=$due; - for (my $i=0;$i<$interval;$i++) { - for (my $n=0; $n<=$#Concepts; $n++ ) { - my $tmp=$Concepts[$n]; - $ConceptData{$tmp.'.'.$i.'.true'}=0; - $ConceptData{$tmp.'.'.$i.'.false'}=0; - } - } -} +=item Package Variables -sub ShowOpGraph { - my ($cache, $students, $courseID)=@_; - my $uri = $cache->{'AnalyzeURI'}; - my $part = $cache->{'AnalyzePart'}; - my $problem = $cache->{'AnalyzeProblem'}; - my $title = $cache->{'AnalyzeProblem'}; - my $interval = $cache->{'Interval'}; - $ConceptData{"Interval"} = $interval; +=item @FullClasslist The full classlist - #Initialize the option response true answers - &InitAnalysis($uri, $part, $problem, $students->[0],$courseID); +=item @Students The students we are concerned with for this invocation - #compute the intervals - &Interval($part,$problem); +=item @Sections The sections available in this class - $title =~ s/\ /"_"/eg; - $r->print('
'.$uri.''); - $r->rflush(); - - #Java script Progress window - &Create_PrgWin(); - &Update_PrgWin("Starting to analyze problem",0,0,''); - for(my $index=0; $index<(scalar @$students); $index++) { - &Update_PrgWin(scalar @$students, $index+1, $students->[$index]); - &OpStatus($problem, $students->[$index], $courseID); - } - &Close_PrgWin(); - - $r->print('
'); - for(my $k=0; $k<$interval; $k++ ) { - &DrawGraph($k,$title); - } - for(my $k=0; $k<$interval; $k++ ) { - &DrawTable($k); - } -#$Apache::lonxml::debug=1; -#&Apache::lonhomework::showhash(%ConceptData); -#$Apache::lonxml::debug=0; - my $Answ=&Apache::lonnet::ssi($uri); - $r->print("
Here you can see the Problem:
$Answ"); -} - -sub DrawTable { - my $k=shift; - my $Max=0; - my @data1; - my @data2; - my $Correct=0; - my $Wrong=0; - for (my $n=0; $n<=$#Concepts; $n++ ) { - my $tmp=$Concepts[$n]; - $data1[$n]=$ConceptData{"$tmp.$k.true"}; - $Correct+=$data1[$n]; - $data2[$n]=$ConceptData{"$tmp.$k.false"}; - $Wrong+=$data2[$n]; - my $Sum=$data1[$n]+$data2[$n]; - if ( $Max<$Sum ) {$Max=$Sum;} - } - for (my $n=0; $n<=$#Concepts; $n++ ) { - if ($data1[$n]+$data2[$n]<$Max) { - $data2[$n]+=$Max-($data1[$n]+$data2[$n]); - } - } - my $P_No = $#data1+1; -# $r->print('
From: ['.localtime($ConceptData{'Int.'.($k-1)}). -# '] To: ['.localtime($ConceptData{"Int.$k"}).']'); - my $Str = "\n".''. - "\n".''. - "\n".''. - "\n".''. - "\n".''. - "\n".''. - "\n".''; - - for (my $n=0; $n<=$#Concepts; $n++ ) { - $Str .= "\n"."". - "\n"."". - "\n".'". - "\n".'". - "\n".'". - "\n".""; - } - $Str.='"; +=item $curr_student The student currently being examined - $Str .= "\n".'
# Concept Correct Wrong
".($n+1)." '.$Concepts[$n]." '.$data1[$n]." '.$data2[$n]."
From:['.localtime($ConceptData{'Int.'.$k}). - '] To: ['.localtime($ConceptData{'Int.'.($k+1)}-1). - "]$Correct$Wrong
'; +=item $prev_student The student previous in the classlist - $r->print($Str); -#$Apache::lonxml::debug=1; -#&Apache::lonhomework::showhash(%ConceptData); -#$Apache::lonxml::debug=0; -} - - -sub DrawGraph { - my ($currentInterval,$title)=@_; - my $Max=0; - my @data1; - my @data2; - - # Adjust Data and find the Max - for(my $n=0; $n<=$#Concepts; $n++ ) { - my $tmp=$Concepts[$n]; - $data1[$n]=$ConceptData{$tmp.'.'.$currentInterval.'.true'}; - $data2[$n]=$ConceptData{$tmp.'.'.$currentInterval.'.false'}; - my $Sum=$data1[$n]+$data2[$n]; - if($Max < $Sum) { $Max = $Sum; } - } - for(my $n=0; $n<=$#Concepts; $n++) { - if($data1[$n]+$data2[$n]<$Max) { - $data2[$n]+=$Max-($data1[$n]+$data2[$n]); - } - } - my $P_No = scalar @data1; - - if($Max > 1) { - $Max += (10 - $Max % 10); - $Max = int($Max); - } else { - $Max = 1; - } - - my $Titr=($ConceptData{'Interval'}>1) ? - $title.'_interval_'.($currentInterval+1) : $title; -# $GData=$Titr.'&Concepts'.'&'.'Answers'.'&'.$Max.'&'.$P_No.'&'.$data1.'&'.$data2; - $GData = $Titr.'&Concepts&Answers&'.$Max.'&'.$P_No.'&'; - $GData .= (join(',',@data1)).'&'.(join(',',@data2)); - - $r->print(''); -} - - -sub Decide { - #deciding the true or false answer belongs to each interval - my ($type,$foil,$time)=@_; - my $k=0; - while ($time>$ConceptData{'Int.'.($k+1)} && - $k<$ConceptData{'Interval'}) {$k++;} - $ConceptData{"$foil_to_concept{$foil}.$k.$type"}++; -} - - -#restore the student submissions and finding the result -sub OpStatus { - my ($problem, $student, $courseID)=@_; - my ($username,$userdomain)=split(/':'/,$student); - my $code='U'; - my %reshash=&Apache::lonnet::restore($problem, $courseID, $userdomain, - $username); - my @True = (); - my @False = (); - my $flag=0; - if ($reshash{'version'}) { - my $tries=0; - &Apache::lonhomework::showhash(%Answer); - for (my $version=1;$version<=$reshash{'version'};$version++) { - my $time=$reshash{"$version:timestamp"}; - - foreach my $key (sort(split(/\:/,$reshash{$version.':keys'}))) { - if (($key=~/\.(\w+)\.(\w+)\.submission$/)) { - my $Id1 = $1; my $Id2 = $2; - #check if this is a repeat submission, if so skip it - if ($reshash{"$version:resource.$Id1.previous"}) { next; } - #if no solved this wasn't a real submission, ignore it - if (!defined($reshash{"$version:resource.$Id1.solved"})) { - &Apache::lonxml::debug("skipping "); - next; - } - my $Resp = $reshash{"$version:$key"}; - my %submission=&Apache::lonnet::str2hash($Resp); - foreach (keys %submission) { - my $Ansr = $Answer{"$Id1.$Id2.foil.value.$_"}; - if ($submission{$_}) { - if ($submission{$_} eq $Ansr) { - &Decide("true",$_,$time ); - } - else {&Decide("false",$_,$time );} - } - } - } - } - } - } -} - -#---- END Analyze Web Page ---------------------------------------------- - -#---- Problem Statistics Web Page --------------------------------------- - -#------- Processing upperlist and lowerlist according to each problem -sub ProcessDiscriminant { - my ($List) = @_; - my @sortedList = sort (@$List); - my $Count = scalar @sortedList; - my $Problem; - my @Dis; - my $Slvd=0; - my $tmp; - my $Sum1=0; - my $Sum2=0; - my $nIndex=0; - my $nStudent=0; - my %Proc=undef; - while ($nIndex<$Count) { - ($Problem,$tmp)=split(/\=/,$sortedList[$nIndex]); - @Dis=split(/\+/,$tmp); - my $Temp = $Problem; - do { - $nIndex++; - $nStudent++; - $Sum1 += $Dis[0]; - $Sum2 += $Dis[1]; - ($Problem,$tmp)=split(/\=/,$sortedList[$nIndex]); - @Dis=split(/\+/,$tmp); - } while ( $Problem eq $Temp && $nIndex < $Count ); -# $Proc{$Temp}=($Sum1/$nStudent).':'.$nStudent; - $Proc{$Temp}=($Sum1/$nStudent).':'.($Sum2/$nStudent); -# $r->print("$nIndex) $Temp --> ($nStudent) $Proc{$Temp}
"); - $Sum1=0; - $Sum2=0; - $nStudent=0; - } - - return %Proc; -} - - -#------- Creating Discimination factor -sub Discriminant { - my ($discriminantFactor)=@_; - my @discriminantKeys=keys(%$discriminantFactor); - my $Count = scalar @discriminantKeys; - - my $UpCnt = int(0.27*$Count); - my $low=0; - my $up=$Count-$UpCnt; - my @UpList=(); - my @LowList=(); - - $Count=0; - foreach my $key (sort(@discriminantKeys)) { - $Count++; - if($low < $UpCnt || $Count > $up) { - $low++; - my $str=$discriminantFactor->{$key}; - foreach(split(/\:/,$str)){ - if($_) { - if($low<$UpCnt) { push(@LowList,$_); } - else { push(@UpList,$_); } - } - } - } - } - my %DisUp = &ProcessDiscriminant(\@UpList); - my %DisLow = &ProcessDiscriminant(\@LowList); +=item $next_student The student next in the classlist - return (\%DisUp, \%DisLow); -} +=over -sub NumericSort { - $a <=> $b; -} +=cut -sub CreateProblemStatisticsTableHeading { - my ($displayFormat,$sequenceSource,$sequenceTitle,$headings)=@_; - if($displayFormat eq 'Display CSV Format') { - $r->print('
"'.$sequenceTitle.'","'); - $r->print($sequenceSource.'"'); - return; - } +####################################################### +####################################################### +# +# Classlist variables +# +my $curr_student; +my $prev_student; +my $next_student; - $r->print('
'.$sequenceTitle.''); +####################################################### +####################################################### - my $Result = "\n".''."\n"; - for(my $nIndex=0; $nIndex < (scalar (keys %$headings)); $nIndex++) { - $Result .= ''."\n"; - } - $Result .= "\n".''."\n"; - $r->print($Result); - $r->rflush(); -} +=pod -sub CloseTable { - my ($cache)=@_; - if($cache->{'DisplayFormat'} eq 'Display CSV Format') { - return; - } - $r->print("\n".'
P#'.''.'
'."\n"); - $r->rflush(); -} +=item &clear_classlist_variables() -# ------ Dump the Student's DB file and handling the data for statistics table -sub ExtractStudentData { - my ($cache,$name)=@_; - my %discriminantFactor; - my @list=(); - - my $totalTries = 0; - my $totalAwarded = 0; - my $tempProblemOrder=0; - foreach my $sequence (split(':', $cache->{'orderedSequences'})) { - if($cache->{'ProblemStatisticsMap'} ne 'All Maps' && - $cache->{'ProblemStatisticsMap'} ne $cache->{$sequence.':title'}) { - next; - } +undef the following package variables: - my $Dis = ''; - foreach my $problemID (split(':', $cache->{$sequence.':problems'})) { - my $problem = $cache->{$problemID.':problem'}; - my $LatestVersion = $cache->{$name.':version:'.$problem}; - - # Output dashes for all the parts of this problem if there - # is no version information about the current problem. - #if(!$LatestVersion) { - # foreach my $part (split(/\:/,$cache->{$sequence.':'. - # $problemID. - # ':parts'})) { - # $codes .= "-,"; - # $attempts .= "0,"; - # } - # next; - #} - - my %partData=undef; - # Initialize part data, display skips correctly - # Skip refers to when a student made no submissions on that - # part/problem. - foreach my $part (split(/\:/,$cache->{$sequence.':'. - $problemID. - ':parts'})) { - $partData{$part.':tries'}=0; - $partData{$part.':code'}='-'; - } +=over - # Looping through all the versions of each part, starting with the - # oldest version. Basically, it gets the most recent - # set of grade data for each part. - for(my $Version=1; $Version<=$LatestVersion; $Version++) { - foreach my $part (split(/\:/,$cache->{$sequence.':'. - $problemID. - ':parts'})) { - - if(!defined($cache->{$name.":$Version:$problem". - ":resource.$part.solved"})) { - # No grade for this submission, so skip - next; - } +=item @FullClasslist - my $tries=0; - my $time=0; - my $awarded=0; - my $code='U'; - - $awarded = $cache->{$name. - "$Version:$problem:resource.". - "$part.awarded"}; - $partData{$part.':awarded'} = ($awarded) ? $awarded : 0; - $totalAwarded += $awarded; - - $tries = $cache->{$name.":$Version:$problem". - ":resource.$part.tries"}; - $partData{$part.':tries'} = ($tries) ? $tries : 0; - $partData{$part.':wrong'} = $partData{$part.':tries'}; - $totalTries += $tries; - - my $val = $cache->{$name.":$Version:$problem". - ":resource.$part.solved"}; - if ($val eq 'correct_by_student') {$code = 'C';} - elsif ($val eq 'correct_by_override') {$code = 'O';} - elsif ($val eq 'incorrect_attempted') {$code = 'I';} - elsif ($val eq 'incorrect_by_override'){$code = 'I';} - elsif ($val eq 'excused') {$code = 'x';} - $partData{$part.':code'}=$code; - - if($partData{$part.':wrong'} ne 0 && - ($code eq 'C' || $code eq 'O')) { - $partData{$part.':wrong'}--; - } - } - } +=item @Students - # Loop through all the parts for the current problem in the - # correct order and prepare the output - foreach (split(/\:/,$cache->{$sequence.':'.$problemID. - ':parts'})) { - my $Yes = 0; - if($partData{$_.':code'} eq 'C' || - $partData{$_.':code'} eq 'O') { - $Yes=1; - } - #my $ptr = "$hash{'title_'.$ResId}"; - my $ptr = $tempProblemOrder.'&'.$problemID; +=item @Sections - if($_ > 1) { - $ptr .= "*(part $_)"; - $Dis .= '&'; - } - my $Fac = ($partData{$_.':Tries'}) ? - ($partData{$_.':awarded'}/$partData{$_.':tries'}) : 0; - my $DisF; - if($Fac > 0 && $Fac < 1) { - $DisF = sprintf( "%.4f", $Fac ); - } else { - $DisF = $Fac; - } - $Dis .= $tempProblemOrder.'='.$DisF.'+'.$Yes; - $ptr .= '&'.$partData{$_.'.Tries'}. - '&'.$partData{$_.'.Wrongs'}. - '&'.$partData{$_.'.Code'}; - push (@list, $ptr); - $tempProblemOrder++; - } - } - if($totalTries) { - my $DisFac = ($totalAwarded/$totalTries); - my $DisFactor = sprintf( "%.4f", $DisFac ); - $discriminantFactor{$DisFactor}=$Dis; - } - } +=item @SelectedSections - return (\%discriminantFactor, \@list); -} +=item %StudentData -sub MySort { - if ( $Pos > 0 ) { - if ($ENV{'form.order'} eq 'Descending') {$b <=> $a;} - else { $a <=> $b; } - } - else { - if ($ENV{'form.order'} eq 'Descending') {$b cmp $a;} - else { $a cmp $b; } - } -} +=item @StudentDataOrder -sub BuildStatisticsTable { - my ($cache,$discriminantFactor,$list,$headings)=@_; +=item @SelectedStudentData - my $p_count = 0; - my $nIndex = 0; - my $dummy; - my $p_val; - my $ResId; - my $NoElements = scalar @$list; +=item $curr_student - foreach my $sequence (split(':', $cache->{'orderedSequences'})) { - if($cache->{'ProblemStatisticsMap'} ne 'All Maps' && - $cache->{'ProblemStatisticsMap'} ne $cache->{$sequence.':title'}) { - next; - } +=item $prev_student - &CreateProblemStatisticsTableHeading($cache->{'DisplayFormat'}, - $cache->{$sequence.':source'}, - $cache->{$sequence.':title'}, - $headings); - my ($Hid,$pr)=split(/\:/,$mapsort{$_}); - my @lpr=split(/\&/,$pr); - for (my $i=1; $i<=$#lpr; $i++) { - my %storestats=(); - my ($PrOrd,$Prob,$Tries,$Wrongs,$Code)=split(/\&/,$list->[$nIndex]); - my $Temp = $Prob; - my $MxTries = 0; - my $TotalTries = 0; - my $YES = 0; - my $Incorrect = 0; - my $Override = 0; - my $StdNo = 0; - my @StdLst; - while ( $PrOrd == $lpr[$i] ) - { - $nIndex++; - $StdNo++; - $StdLst[ $StdNo ] = $Tries; - $TotalTries += $Tries; - if ( $MxTries < $Tries ) { $MxTries = $Tries; } - if ( $Code eq 'C' ){ $YES++; } - elsif( $Code eq 'I' ) { $Incorrect++; } - elsif( $Code eq 'O' ) { $Override++; } - elsif( $Code eq 'U' ) { $StdNo--; } - ($PrOrd,$Prob,$Tries,$Wrongs,$Code)=split(/\&/,$list->[$nIndex]); - } - - $p_count++; - my $Dummy; - ($ResId,$Dummy)=split(/\*/,$Temp); - - $Temp = ''.$hash{'title_'.$ResId}.$Dummy.''; - - my $res = &Apache::lonnet::declutter($hash{'src_'.$ResId}); - my $urlres=$res; - - $ResId=~/(\d+)\.(\d+)/; - my $Map = &Apache::lonnet::declutter( $hash{'map_id_'.$1} ); - $urlres=$Map; - - $res = ''.$res.''; - #$Map = ''.$res.''; - -#------------------------ Compute the Average of Tries about one problem - my $Average = ($StdNo) ? $TotalTries/$StdNo : 0; - - $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___timestamp'}=time; - $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___stdno'}=$StdNo; - $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___avetries'}=$Average; - -#-------------------------------- Compute percentage of Wrong tries - my $Wrong = ( $StdNo ) ? 100 * ( $Incorrect / $StdNo ) : 0; - -#-------------------------------- Compute Standard Deviation - my $StdDev = 0; - if ( $StdNo > 1 ) { - for ( my $n = 0; $n < $StdNo; $n++ ) { - my $Dif = $StdLst[ $n ]-$Average; - $StdDev += $Dif*$Dif; - } - $StdDev /= ( $StdNo - 1 ); - $StdDev = sqrt( $StdDev ); - } - -#-------------------------------- Compute Degree of Difficulty - my $DoDiff = 0; - if( $TotalTries > 0 ) { - $DoDiff = 1 - ( ( $YES + $Override ) / $TotalTries ); -# $DoDiff = ($TotalTries)/($YES + $Override+ 0.1); - } - - $storestats{$ENV{'request.course.id'}.'___'.$urlres.'___difficulty'}=$DoDiff; - -#-------------------------------- Compute the Skewness - my $Skewness = 0; - my $Sum = 0; - if ( $StdNo > 0 && $StdDev > 0 ) { - for ( my $n = 0; $n < $StdNo; $n++ ) { - my $Dif = $StdLst[ $n ]-$Average; - $Skewness += $Dif*$Dif*$Dif; - } - $Skewness /= $StdNo; - $Skewness /= $StdDev*$StdDev*$StdDev; - } - -#--------------------- Compute the Discrimination Factors - my ($Up1,$Up2)=split(/\:/,':');#jason$DisUp->{$lpr[$i]}); - my ($Lw1,$Lw2)=split(/\:/,':');#jason$DisLow->{$lpr[$i]}); - my $Dis1 = $Up1 - $Lw1; - my $Dis2 = $Up2 - $Lw2; - my $_D1 = sprintf("%.2f", $Dis1); - my $_D2 = sprintf("%.2f", $Dis2); - -#----------------- Some restition in presenting the float numbers - my $Avg = sprintf( "%.2f", $Average ); - my $Wrng = sprintf( "%.1f", $Wrong ); - my $SD = sprintf( "%.1f", $StdDev ); - my $DoD = sprintf( "%.2f", $DoDiff ); - my $Sk = sprintf( "%.1f", $Skewness ); - my $join = $lpr[$i].'&'.$Temp.'&'.$StdNo.'&'. - $TotalTries.'&'.$MxTries.'&'.$Avg.'&'. - $YES.'&'.$Override.'&'.$Wrng.'&'.$DoD.'&'. - $SD.'&'.$Sk.'&'.$_D1.'&'.$_D2.'&'. - $Prob; - $CachData{($p_count-1)}=$join; - - $urlres=~/^(\w+)\/(\w+)/; - if ($StdNo) { - &Apache::lonnet::put('resevaldata',\%storestats,$1,$2); - } -#-------------------------------- Row of statistical table - &TableRow($cache,$join,$i,($p_count-1)); - } - &CloseTable($cache); - } - &Close_PrgWin(); +=item $next_student + +=back + +=cut + +####################################################### +####################################################### +sub clear_classlist_variables { + undef(@FullClasslist); + undef(@Students); + undef(@Sections); + undef(@SelectedSections); + undef(%StudentData); + undef(@SelectedStudentData); + undef($curr_student); + undef($prev_student); + undef($next_student); } +####################################################### +####################################################### + =pod -sub Cache_Statistics { - my ($cache)=@_; - my @list = (); - my $Useful; - my $UnUseful; -# $r->print(''."\n"); - my %myHeader = reverse( %Header ); - $Pos = $myHeader{$ENV{'form.sort'}}; - if ($Pos > 0) {$Pos++;} - my $p_count = 0; - foreach my $key( keys %CachData) { - my @Temp=split(/\&/,$CachData{$key}); - if ( $Pos == 0 ) { - ($UnUseful,$Useful)=split(/\>/,$Temp[$Pos]); - } - else { - $Useful = $Temp[$Pos]; - } - $list[$p_count]=$Useful.'@'.$CachData{$key}; - $p_count++; - } - - @list = sort MySort (@list); - - my $nIndex=0; - - if ( $Pos == 0 ) { - foreach (sort keys %mapsort) { - my ($Hid,$pr)=split(/\:/,$mapsort{$_}); - &CreateProblemStatisticsTableHeading($cache,1,$Hid); - my @lpr=split(/\&/,$pr); - for (my $i=1; $i<=$#lpr; $i++) { - my($Pre, $Post) = split(/\@/,$list[$nIndex]); - #$r->print('
'.$Pre.'---'.$Post); - &TableRow($cache,$Post,$i,$nIndex); - $nIndex++; - } - &CloseTable($cache); - } - } - else { - &CreateProblemStatisticsTableHeading($cache,0); - for ( my $nIndex = 0; $nIndex < $p_count; $nIndex++ ) { - my($Pre, $Post) = split(/\@/,$list[$nIndex]); - &TableRow($cache,$Post,$nIndex,$nIndex); - } - &CloseTable($cache); - } -} -=cut -sub TableRow { - my ($cache,$Str,$Idx,$RealIdx)=@_; - my($PrOrd,$Temp,$StdNo,$TotalTries,$MxTries,$Avg,$YES,$Override, - $Wrng,$DoD,$SD,$Sk,$_D1,$_D2,$Prob)=split(/\&/,$Str); - if($cache->{'DisplayFormat'} eq 'Display CSV Format') { - my ($ResId,$Dummy)=split(/\*/,$Prob); - my $Ptr = "\n".'
'. - "\n".'"'.($RealIdx+1).'",'. - "\n".'"'.$hash{'title_'.$ResId}.$Dummy.'",'. - "\n".'"'.$hash{'src_'.$ResId}.'",'. - "\n".'"'.$StdNo.'",'. - "\n".'"'.$TotalTries.'",'. - "\n".'"'.$MxTries.'",'. - "\n".'"'.$Avg.'",'. - "\n".'"'.$YES.'",'. - "\n".'"'.$Override.'",'. - "\n".'"'.$Wrng.'",'. - "\n".'"'.$DoD.'",'. - "\n".'"'.$SD.'",'. - "\n".'"'.$Sk.'",'. - "\n".'"'.$_D1.'",'. - "\n".'"'.$_D2.'"'; - $r->print("\n".$Ptr); - } else { - my $Ptr = "\n".''. - "\n".''.($RealIdx+1).''. - # "\n".''.$PrOrd.$Temp.''. - "\n".''.$Temp.''. - "\n".' '.$StdNo.''. - "\n".''.$TotalTries.''. - "\n".''.$MxTries.''. - "\n".''.$Avg.''. - "\n".' '.$YES.''. - "\n".' '.$Override.''. - "\n".' '.$Wrng.''. - "\n".' '.$DoD.''. - "\n".' '.$SD.''. - "\n".' '.$Sk.''. - "\n".' '.$_D1.''. - "\n".' '.$_D2.''; - $r->print("\n".$Ptr.'' ); - } - $GraphDat{$RealIdx}=$DoD.':'.$Wrng; -} - -sub StatusOptions { - my ($cache)=@_; - - my $Status = $cache->{'Status'}; - my $OpSel1 = ''; - my $OpSel2 = ''; - my $OpSel3 = ''; - - if($Status eq 'Any') { $OpSel3 = ' selected'; } - elsif($Status eq 'Expired' ) { $OpSel2 = ' selected'; } - else { $OpSel1 = ' selected'; } - - my $Ptr = ''; - $Ptr .= 'Student Status:'."\n"; - $Ptr .= ''."\n"; - - return $Ptr; -} - -sub AscendOrderOptions { - my ($cache)=@_; - - my $order = $cache->{'Ascend'}; - my $OpSel1 = ''; - my $OpSel2 = ''; - if($order eq 'Ascending') { - $OpSel1 = ' selected'; - } else { - $OpSel2 = ' selected'; - } +=item &PrepareClasslist() - my $Ptr = ''; - $Ptr .= 'Sorting Type:'."\n"; - $Ptr .= ''."\n"; - - return $Ptr; -} - -sub ProblemStatisticsButtons { - my ($cache)=@_; - - my $Ptr = ''; - $Ptr .= '{'DisplayFormat'} eq 'Display CSV Format') { - $Ptr .= 'value="Display CSV Format" />'."\n"; - } else { - $Ptr .= 'value="Display Table Format" />'."\n"; - } - $Ptr .= ''; +Build up the classlist information. The classlist information is kept in +the following package variables: - return $Ptr; -} +=over -sub ProblemStatisticsLegend { - my $Ptr = ''; - $Ptr = ''; - $Ptr .= ''; - $Ptr .= ''; - $Ptr .= ''; - $Ptr .= ''; - $Ptr .= ''; - $Ptr .= ''; - $Ptr .= ''; - $Ptr .= ''; - $Ptr .= ''; - $Ptr .= ''; - $Ptr .= ''; - $Ptr .= '
'; - $Ptr .= '#Stdnts:Total Number of Students opened the problem.'; - $Ptr .= '
'; - $Ptr .= 'Tries:Total Number of Tries for solving the problem.'; - $Ptr .= '
'; - $Ptr .= 'Mod:Maximunm Number of Tries for solving the problem.'; - $Ptr .= '
'; - $Ptr .= 'Mean:Average Number of the tries. [ Tries / #Stdnts ]'; - $Ptr .= '
'; - $Ptr .= '#YES:Number of students solved the problem correctly.'; - $Ptr .= '
'; - $Ptr .= '#yes:Number of students solved the problem by override.'; - $Ptr .= '
'; - $Ptr .= '%Wrng:Percentage of students tried to solve the problem '; - $Ptr .= 'but still incorrect. [ 100*((#Stdnts-(#YES+#yes))/#Stdnts) ]'; - $Ptr .= '
'; -# Kashy formula -# ' DoDiff : Degree of Difficulty of the problem.
'. -# '[ Tries/(#YES+#yes+0.1) ]
'. - #Gerd formula - $Ptr .= 'DoDiff:		Degree of Difficulty of the problem. '; - $Ptr .= '[ 1 - ((#YES+#yes) / Tries) ]'; - $Ptr .= '
'; - $Ptr .= 'S.D.:Standard Deviation of the tries. '; - $Ptr .= '[ sqrt(sum((Xi - Mean)^2)) / (#Stdnts-1) '; - $Ptr .= 'where Xi denotes every student\'s tries ]'; - $Ptr .= '
'; - $Ptr .= 'Skew.:Skewness of the students tries.'; - $Ptr .= '[(sqrt( sum((Xi - Mean)^3) / #Stdnts)) / (S.D.^3)]'; - $Ptr .= '
'; - $Ptr .= 'Dis.F.:Discrimination Factor: A Standard for evaluating the '; - $Ptr .= 'problem according to a Criterion
'; - $Ptr .= '[Applied Criterion in %27 Upper Students - '; - $Ptr .= 'Applied the same Criterion in %27 Lower Students]
'; - $Ptr .= '1st Criterion for Sorting the Students: '; - $Ptr .= 'Sum of Partial Credit Awarded / Total Number of Tries
'; - $Ptr .= '2nd Criterion for Sorting the Students: '; - $Ptr .= 'Total number of Correct Answers / Total Number of Tries'; - $Ptr .= '
'; - - return $Ptr; -} - -#---- END Problem Statistics Web Page ---------------------------------------- - -#---- Problem Statistics Graph Web Page -------------------------------------- - -sub GetGraphData { - my ($whichGraph, $courseID)=@_; - my $Col=0; - my $graphTitle=''; - my $data=''; - my $count = 0; - my $Max = 0; - my $graphData='Graph data does not exist.'; - my $GraphDB = "/home/httpd/perl/tmp/$ENV{'user.name'}". - "_$ENV{'user.domain'}_$courseID\_graph.db"; - if(-e $GraphDB) { - if(tie(%GraphDat,'GDBM_File',"$GraphDB",&GDBM_READER,0640)) { - if($whichGraph eq 'DiffGraph') { - $graphTitle = 'Degree-of-Difficulty'; - $Col = 0; - } else { - $graphTitle = 'Wrong-Percentage'; - $Col = 1; - } - foreach (sort NumericSort keys %GraphDat) { - my @Temp=split(/\:/,$GraphDat{$_}); - my $inf = $Temp[$Col]; - if($Max < $inf) { - $Max = $inf; - } - $data .= $inf.','; - $count++; - } - if($Max > 1) { - $Max += (10 - $Max % 10); - $Max = int($Max); - } else { - $Max = 1; - } - untie(%GraphDat); - my $Course = $ENV{'course.'.$courseID.'.description'}; - $Course =~ s/\ /"_"/eg; - $graphData = $Course.'&'.'Problems'.'&'.$graphTitle.'&'.$Max.'&'; - $graphData .= $count.'&'.$data; - } else { - $graphData = "Unable to tie hash to db file"; - } - } +=item @FullClasslist - return $graphData; -} +=item @Students -#---- END Problem Statistics Graph Web Page ---------------------------------- +=item @Sections -#---- Problem Analysis Web Page ---------------------------------------------- +=item @SelectedSections -sub IntervalOptions { - my ($cache)=@_; +=item %StudentData - my $interval = 1; - for(my $n=1; $n<=7; $n++) { - if($cache->{'Interval'} == $n) { - $interval = $n; +=item @SelectedStudentData + +=item $curr_student + +=item $prev_student + +=item $next_student + +=back + +$curr_student, $prev_student, and $next_student may not be defined, depending +upon the calling context. + +=cut + +####################################################### +####################################################### +sub PrepareClasslist { + my %Sections; + &clear_classlist_variables(); + # + # Retrieve the classlist + my $cid = $ENV{'request.course.id'}; + my $cdom = $ENV{'course.'.$cid.'.domain'}; + my $cnum = $ENV{'course.'.$cid.'.num'}; + my ($classlist,$field_names) = &Apache::loncoursedata::get_classlist($cid, + $cdom,$cnum); + if (exists($ENV{'form.Section'})) { + if (ref($ENV{'form.Section'})) { + @SelectedSections = @{$ENV{'form.Section'}}; + } elsif ($ENV{'form.Section'} !~ /^\s*$/) { + @SelectedSections = ($ENV{'form.Section'}); + } + } + @SelectedSections = ('all') if (! @SelectedSections); + foreach (@SelectedSections) { + if ($_ eq 'all') { + @SelectedSections = ('all'); + } + } + # + # Deal with instructors with restricted section access + if ($ENV{'request.course.sec'} !~ /^\s*$/) { + @SelectedSections = ($ENV{'request.course.sec'}); + } + # + # Set up %StudentData + @StudentDataOrder = qw/fullname username domain id section status/; + foreach my $field (@StudentDataOrder) { + $StudentData{$field}->{'title'} = $field; + $StudentData{$field}->{'base_width'} = length($field); + $StudentData{$field}->{'width'} = + $StudentData{$field}->{'base_width'}; + } + # + # get the status requested + my $requested_status = 'Active'; + $requested_status = $ENV{'form.Status'} if (exists($ENV{'form.Status'})); + # + # Process the classlist + while (my ($student,$student_data) = each (%$classlist)) { + my $studenthash = (); + for (my $i=0; $i< scalar(@$field_names);$i++) { + my $field = $field_names->[$i]; + # Store the data + $studenthash->{$field}=$student_data->[$i]; + # Keep track of the width of the fields + next if (! exists($StudentData{$field})); + my $length = length($student_data->[$i]); + if ($StudentData{$field}->{'width'} < $length) { + $StudentData{$field}->{'width'} = $length; + } + } + push (@FullClasslist,$studenthash); + # + # Build up a list of sections + my $section = $studenthash->{'section'}; + if (! defined($section) || $section =~/^\s*$/ || $section == -1) { + $studenthash->{'section'} = 'none'; + $section = $studenthash->{'section'}; + } + $Sections{$section}++; + # + # Only put in the list those students we are interested in + foreach my $sect (@SelectedSections) { + if ( (($sect eq 'all') || + ($section eq $sect)) && + (($studenthash->{'status'} eq $requested_status) || + ($requested_status eq 'Any')) + ){ + push (@Students,$studenthash); + last; + } } } - - my $Ptr = '
Select number of intervals'."\n". - ''."\n"; - - return $Ptr; + # + if (exists($ENV{'form.StudentData'})) { + if (ref($ENV{'form.StudentData'}) eq 'ARRAY') { + @SelectedStudentData = @{$ENV{'form.StudentData'}}; + } else { + @SelectedStudentData = ($ENV{'form.StudentData'}); + } + } else { + @SelectedStudentData = ('username'); + } + foreach (@SelectedStudentData) { + if ($_ eq 'all') { + @SelectedStudentData = ('all'); + last; + } + } + # + return; } -sub OptionResponseTable { - my ($cache)=@_; - my $Str = ''; - $Str .= '
Option Response Problems in this course:'."\n"; - $Str .= '

'."\n"; - $Str .= ""; - $Str .= ''."\n"; - - my $number=1; - foreach (split(':::',$cache->{'OptionResponses'})) { - my ($uri,$title,$part,$problem)=split('::',$_); - my $Temp = ''.$title.''; - $Str .= ''; - $Str .= ''; - $Str .= ''; - $Str .= ''; - $Str .= ''."\n"; - $number++; - } - $Str .= '
\# Problem Title Resource Analysis
'.$number.' '.$Temp.' '.$uri.'
'."\n"; - return $Str; -} +####################################################### +####################################################### -#---- END Problem Analysis Web Page ------------------------------------------ +=pod -#---- Student Assessment Web Page -------------------------------------------- +=item get_students -sub MapOptions { - my ($cache, $page)=@_; - my $Ptr = ''; - $Ptr .= 'Select Map'."\n"; - $Ptr .= '{'OptionResponses'})) { - $Ptr .= '{'symb'} ne $map_symb && $map_symb ne 'all'); + next if ($sequence->{'num_assess'} < 1); + push (@Sequences_to_Show,$sequence); + } + } + return @Sequences_to_Show; } -#---- END Menu Web Page ------------------------------------------------------ +####################################################### +####################################################### -#---- HELPER FUNCTIONS ------------------------------------------------------- +=pod -sub CheckFormElement { - my ($cache, $ENVName, $cacheName, $default)=@_; +=item &PrepareCourseData($r) - if(defined($ENV{'form.'.$ENVName})) { - $cache->{$cacheName} = $ENV{'form.'.$ENVName}; - } elsif(!defined($cache->{$cacheName})) { - $cache->{$cacheName} = $default; - } +=cut +####################################################### +####################################################### +sub PrepareCourseData { + my ($r) = @_; + &clear_sequence_variables(); + my ($top,$sequences,$assessments) = + &Apache::loncoursedata::get_sequence_assessment_data(); + if (! defined($top) || ! ref($top)) { + # There has been an error, better report it + &Apache::lonnet::logthis('top is undefined'); + return; + } + $top_map = $top if (ref($top)); + @Sequences = @{$sequences} if (ref($sequences) eq 'ARRAY'); + @Assessments = @{$assessments} if (ref($assessments) eq 'ARRAY'); + # + # Compute column widths + foreach my $seq (@Sequences) { + my $name_length = length($seq->{'title'}); + my $num_parts = $seq->{'num_assess_parts'}; + # + # Use 3 digits for each the sum and total, which means 7 total... + my $num_col = $num_parts+7; + if ($num_col < $name_length) { + $num_col = $name_length; + } + $seq->{'base_width'} = $name_length; + $seq->{'width'} = $num_col; + } return; } -sub ProcessFormData{ - my ($cacheDB, $isCached)=@_; - my %cache; - - if(tie(%cache,'GDBM_File',$cacheDB,&GDBM_WRCREAT,0640)) { - # Select page to display - if(defined($ENV{'form.ProblemStatistics'}) || - defined($ENV{'form.ProblemStatisticsRecalculate'}) || - defined($ENV{'form.DisplayCSVFormat'})) { - $cache{'GoToPage'} = 'ProblemStatistics'; - &CheckFormElement(\%cache, 'DisplayCSVFormat', - 'DisplayFormat', 'Display Table Format'); - &CheckFormElement(\%cache, 'Ascend','ProblemStatisticsAscend', - 'Ascending'); - &CheckFormElement(\%cache, 'Maps', 'ProblemStatisticsMap', - 'All Maps'); - } elsif(defined($ENV{'form.ProblemAnalysis'})) { - $cache{'GoToPage'} = 'ProblemAnalysis'; - &CheckFormElement(\%cache, 'Interval', 'Interval', '1'); - } elsif(defined($ENV{'form.StudentAssessment'}) || - defined($ENV{'form.CreateStudentAssessment'}) || - defined($ENV{'form.NextStudent'}) || - defined($ENV{'form.PreviousStudent'})) { - $cache{'GoToPage'} = 'StudentAssessment'; - if(defined($ENV{'form.NextStudent'})) { - $cache{'StudentAssessmentMove'} = 'next'; - } elsif(defined($ENV{'form.PreviousStudent'})) { - $cache{'StudentAssessmentMove'} = 'previous'; - } else { - $cache{'StudentAssessmentMove'} = 'selected'; - } - &CheckFormElement(\%cache, 'Maps', 'StudentAssessmentMap', - 'All Maps'); +####################################################### +####################################################### - &CheckFormElement(\%cache, 'Students', 'StudentAssessmentStudent', - 'No Student Selected'); - } elsif(defined($ENV{'form.DoDiffGraph'})) { - $cache{'GoToPage'} = 'DoDiffGraph'; - } elsif(defined($ENV{'form.PercentWrongGraph'})) { - $cache{'GoToPage'} = 'PercentWrongGraph'; - } elsif(defined($ENV{'form.ActivityLog'})) { - $cache{'GoToPage'} = 'ActivityLog'; - } else { - $cache{'GoToPage'} = 'Menu'; - } +=pod - &CheckFormElement(\%cache, 'Status', 'Status', 'Active'); +=item &log_sequence($sequence,$recursive,$padding) - foreach (keys(%ENV)) { - if(/form\.Analyze:::/) { - $cache{'GoToPage'} = 'Analyze'; - my ($uri, $title, $part, $problem); - (undef, $uri, $title, $part, $problem)=split(':::', $_); - $cache{'AnalyzeURI'} = $uri; - $cache{'AnalyzeTitle'} = $title; - $cache{'AnalyzePart'} = $part; - $cache{'AnalyzeProblem'} = $problem; +Write data about the sequence to a logfile. If $recursive is not +undef the data is written recursively. $padding is used for recursive +calls. - &CheckFormElement(\%cache, 'Interval', 'Interval', '1'); +=cut + +####################################################### +####################################################### +sub log_sequence { + my ($seq,$recursive,$padding) = @_; + $padding = '' if (! defined($padding)); + if (ref($seq) ne 'HASH') { + &Apache::lonnet::logthis('log_sequence passed bad sequnce'); + return; + } + &Apache::lonnet::logthis($padding.'sequence '.$seq->{'title'}); + while (my($key,$value) = each(%$seq)) { + next if ($key eq 'contents'); + if (ref($value) eq 'ARRAY') { + for (my $i=0;$i< scalar(@$value);$i++) { + &Apache::lonnet::logthis($padding.$key.'['.$i.']='. + $value->[$i]); } + } else { + &Apache::lonnet::logthis($padding.$key.'='.$value); } } - + if (defined($recursive)) { + &Apache::lonnet::logthis($padding.'-'x20); + &Apache::lonnet::logthis($padding.'contains:'); + foreach my $item (@{$seq->{'contents'}}) { + if ($item->{'type'} eq 'container') { + &log_sequence($item,$recursive,$padding.' '); + } else { + &Apache::lonnet::logthis($padding.'title = '.$item->{'title'}); + while (my($key,$value) = each(%$item)) { + next if ($key eq 'title'); + if (ref($value) eq 'ARRAY') { + for (my $i=0;$i< scalar(@$value);$i++) { + &Apache::lonnet::logthis($padding.$key.'['.$i.']='. + $value->[$i]); + } + } else { + &Apache::lonnet::logthis($padding.$key.'='.$value); + } + } + } + } + &Apache::lonnet::logthis($padding.'end contents of '.$seq->{'title'}); + &Apache::lonnet::logthis($padding.'-'x20); + } return; } -=pod +############################################## +############################################## -=item &SortStudents() +=pod -Determines which students to display and in which order. Which are -displayed are determined by their status(active/expired). The order -is determined by the sort button pressed (default to username). The -type of sorting is username, lastname, or section. +=item &StudentDataSelect($elementname,$status,$numvisible,$selected) -=over 4 +Returns html for a selection box allowing the user to choose one (or more) +of the fields of student data available (fullname, username, id, section, etc) -Input: $students, $CacheData - -$students: A array pointer to a list of students (username:domain) +=over 4 -$CacheData: A pointer to the hash tied to the cached data +=item $elementname The name of the HTML form element -Output: \@order +=item $status 'multiple' or 'single' selection box -@order: An ordered list of students (username:domain) +=item $numvisible The number of options to be visible =back =cut -sub SortStudents { - my ($students,$cache)=@_; - - my @sorted1Students=(); - foreach (@$students) { - push(@sorted1Students, $_); - } -# my ($end,$start)=split(/\:/,$cache->{$_.':date'}); -# my $active=1; -# my $now=time; -# my $Status=$cache->{'form.Status'}; -# $Status = ($Status) ? $Status : 'Active'; -# if((($end) && $now > $end) && (($Status eq 'Active'))) { -# $active=0; -# } -# if(($Status eq 'Expired') && ($end == 0 || $now < $end)) { -# $active=0; -# } -# if($active) { -# push(@sorted1Students, $_); -# } -# } - - my $Pos = $cache->{'form.ChartSort'}; - my %sortData; - if($Pos eq 'Last Name') { - for(my $index=0; $index{$sorted1Students[$index].':fullname'}}= - $sorted1Students[$index]; - } - } elsif($Pos eq 'Section') { - for(my $index=0; $index{$sorted1Students[$index].':section'}. - $sorted1Students[$index]}=$sorted1Students[$index]; - } - } else { - # Sort by user name - for(my $index=0; $index'."\n"; + # + # Deal with 'all' + $Str .= '