version 1.23, 2002/08/13 15:05:13
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version 1.24, 2002/08/14 13:13:37
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Line 87 sub BuildProblemStatisticsPage {
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Line 87 sub BuildProblemStatisticsPage {
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# my %Discuss=&Apache::loncoursedata::LoadDiscussion($courseID); |
# my %Discuss=&Apache::loncoursedata::LoadDiscussion($courseID); |
# my ($upper, $lower) = &Discriminant(\%discriminant,$r); |
# my ($upper, $lower) = &Discriminant(\%discriminant,$r); |
if(!defined($cache{'StatisticsCached'})) { |
if(!defined($cache{'StatisticsCached'})) { |
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if(defined($cache{'StatisticsCached'})) { |
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untie(%cache); |
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unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_WRCREAT(),0640)) { |
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$r->print('Unable to tie database.'); |
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return; |
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} |
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my @statkeys = split(':::', $cache{'StatisticsKeys'}); |
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delete $cache{'StatisticsKeys'}; |
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delete $cache{'StatisticsCached'}; |
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foreach(@statkeys) { |
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delete $cache{$_}; |
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} |
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} |
untie(%cache); |
untie(%cache); |
&Apache::loncoursedata::DownloadStudentCourseDataSeparate($students, |
&Apache::loncoursedata::DownloadStudentCourseDataSeparate($students, |
'true', |
'true', |
Line 102 sub BuildProblemStatisticsPage {
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Line 115 sub BuildProblemStatisticsPage {
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return; |
return; |
} |
} |
my ($problemData) = &ExtractStudentData(\%cache, $students); |
my ($problemData) = &ExtractStudentData(\%cache, $students); |
&CalculateStatistics($problemData); |
&CalculateStatistics($problemData, \%cache); |
untie(%cache); |
untie(%cache); |
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unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_WRCREAT(),0640)) { |
unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_WRCREAT(),0640)) { |
Line 112 sub BuildProblemStatisticsPage {
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Line 125 sub BuildProblemStatisticsPage {
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foreach(keys(%$problemData)) { |
foreach(keys(%$problemData)) { |
$cache{$_} = $problemData->{$_}; |
$cache{$_} = $problemData->{$_}; |
} |
} |
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$cache{'StatisticsKeys'} = join(':::', keys(%$problemData)); |
$cache{'StatisticsCached'} = 'true'; |
$cache{'StatisticsCached'} = 'true'; |
untie(%cache); |
untie(%cache); |
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Line 130 sub BuildProblemStatisticsPage {
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Line 144 sub BuildProblemStatisticsPage {
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return; |
return; |
} |
} |
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sub BuildGraphicChart { |
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my ($graph,$cacheDB,$courseDescription,$r)=@_; |
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my %cache; |
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my $max = 0; |
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unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) { |
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return '<html><body>Unable to tie database.</body></html>'; |
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} |
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my @problems = split(':::', $cache{'problemList'}); |
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my @values = (); |
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foreach (@problems) { |
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my $data = 0; |
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if($graph eq 'DoDiffGraph') { |
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$data = sprintf("%.2f", $cache{$_.':degreeOfDifficulty'}), |
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} else { |
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$data = sprintf("%.1f", $cache{$_.':percentWrong'}), |
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} |
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if($max < $data) { |
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$max = $data; |
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} |
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push(@values, $data); |
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} |
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untie(%cache); |
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my $sendValues = join(',', @values); |
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# my $sendCount = $#values; |
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my $sendCount = scalar(@values); |
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my $title = ''; |
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if($graph eq 'DoDiffGraph') { |
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$title = 'Degree-of-Difficulty'; |
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} else { |
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$title = 'Wrong-Percentage'; |
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} |
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my @GData = ($courseDescription, 'Problems', $title, $max, $sendCount, |
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$sendValues); |
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$r->print('</form>'."\n"); |
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$r->print('<IMG src="/cgi-bin/graph.gif?'.(join('&', @GData)).'" border="1" />'); |
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$r->print('<form>'."\n"); |
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return; |
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} |
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#---- Problem Statistics Web Page --------------------------------------- |
#---- Problem Statistics Web Page --------------------------------------- |
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Line 452 sub ExtractStudentData {
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Line 510 sub ExtractStudentData {
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} |
} |
} |
} |
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my @upperStudents1=(); |
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my @lowerStudents1=(); |
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my @upperStudents2=(); |
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my @lowerStudents2=(); |
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my $upperCount = int(0.27*scalar(@$students)); |
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# Discriminant Factor criterion 1 |
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my $sortedStudents = &SortDivideByTries($students,$cache,':totalAwarded'); |
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for(my $i=0; $i<$upperCount; $i++) { |
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push(@lowerStudents1, $sortedStudents->[$i]); |
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push(@upperStudents1, $sortedStudents->[(scalar(@$students)-$i-1)]); |
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} |
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$problemData{'studentsUpperListCriterion1'}=join(':::', @upperStudents1); |
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$problemData{'studentsLowerListCriterion1'}=join(':::', @lowerStudents1); |
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# Discriminant Factor criterion 2 |
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$sortedStudents = &SortDivideByTries($students, $cache, ':totalSolved'); |
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for(my $i=0; $i<$upperCount; $i++) { |
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push(@lowerStudents2, $sortedStudents->[$i]); |
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push(@upperStudents2, $sortedStudents->[(scalar(@$students)-$i-1)]); |
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} |
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$problemData{'studentsUpperListCriterion2'}=join(':::', @upperStudents2); |
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$problemData{'studentsLowerListCriterion2'}=join(':::', @lowerStudents2); |
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$problemData{'problemList'} = join(':::', @problemList); |
$problemData{'problemList'} = join(':::', @problemList); |
# $Discussed=0; |
# $Discussed=0; |
# if($Discuss->{"$name:$problem"}) { |
# if($Discuss->{"$name:$problem"}) { |
Line 462 sub ExtractStudentData {
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Line 546 sub ExtractStudentData {
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return \%problemData; |
return \%problemData; |
} |
} |
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sub SortDivideByTries { |
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my ($toSort, $data, $sortOn)=@_; |
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my @orderedData = sort { ($data->{$a.':totalTries'}) ? |
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($data->{$a.$sortOn}/$data->{$a.':totalTries'}):0 |
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<=> |
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($data->{$b.':totalTries'}) ? |
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($data->{$b.$sortOn}/$data->{$b.':totalTries'}):0 |
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} @$toSort; |
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return \@orderedData; |
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} |
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sub SortProblems { |
sub SortProblems { |
my ($problemData,$sortBy,$ascend)=@_; |
my ($problemData,$sortBy,$ascend)=@_; |
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Line 498 sub SortProblems {
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Line 594 sub SortProblems {
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} |
} |
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sub CalculateStatistics { |
sub CalculateStatistics { |
my ($data)=@_; |
my ($data, $cache)=@_; |
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my @problems = split(':::', $data->{'problemList'}); |
my @problems = split(':::', $data->{'problemList'}); |
foreach(@problems) { |
foreach(@problems) { |
Line 542 sub CalculateStatistics {
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Line 638 sub CalculateStatistics {
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0; |
0; |
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# Discrimination Factor 1 |
# Discrimination Factor 1 |
$data->{$_.':discriminationFactor1'} = 0; |
my ($sequence, $problem, $part) = split(':', $_); |
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# Discrimination Factor 2 |
my @upper1 = split(':::', $data->{'studentsUpperListCriterion1'}); |
$data->{$_.':discriminationFactor2'} = 0; |
my @lower1 = split(':::', $data->{'studentsLowerListCriterion1'}); |
} |
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return; |
my $upper1Sum=0; |
} |
foreach my $name (@upper1) { |
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$upper1Sum += $cache->{"$name:$problem:$part:awarded"}; |
sub ProcessDiscriminant { |
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my ($List) = @_; |
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my @sortedList = sort (@$List); |
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my $Count = scalar @sortedList; |
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my $Problem; |
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my @Dis; |
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my $Slvd=0; |
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my $tmp; |
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my $Sum1=0; |
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my $Sum2=0; |
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my $nIndex=0; |
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my $nStudent=0; |
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my %Proc=undef; |
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while ($nIndex<$Count) { |
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# $jr->print("<br> $nIndex) $sortedList[$nIndex]"); |
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($Problem,$tmp)=split(/\=/,$sortedList[$nIndex]); |
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@Dis=split(/\+/,$tmp); |
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my $Temp = $Problem; |
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do { |
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$nIndex++; |
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$nStudent++; |
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$Sum1 += $Dis[0]; |
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$Sum2 += $Dis[1]; |
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($Problem,$tmp)=split(/\=/,$sortedList[$nIndex]); |
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@Dis=split(/\+/,$tmp); |
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} while ( $Problem eq $Temp && $nIndex < $Count ); |
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$Proc{$Temp}=($Sum1/$nStudent).':'.($Sum2/$nStudent); |
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# $jr->print("<br> $nIndex) $Temp --> ($nStudent) $Proc{$Temp}"); |
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$Sum1=0; |
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$Sum2=0; |
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$nStudent=0; |
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} |
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return %Proc; |
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} |
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#------- Creating Discimination factor |
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sub Discriminant { |
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my ($discriminant)=@_; |
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my @discriminantKeys=keys(%$discriminant); |
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my $Count = scalar @discriminantKeys; |
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my $UpCnt = int(0.27*$Count); |
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my $low=0; |
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my $up=$Count-$UpCnt; |
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my @UpList=(); |
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my @LowList=(); |
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$Count=0; |
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foreach my $key (sort(@discriminantKeys)) { |
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$Count++; |
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if($low < $UpCnt || $Count > $up) { |
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$low++; |
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my $str=$discriminant->{$key}; |
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foreach(split(/\&/,$str)){ |
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if($_) { |
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if($low<$UpCnt) { push(@LowList,$_); } |
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else { push(@UpList,$_); } |
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} |
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} |
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} |
} |
} |
$upper1Sum /= (scalar(@upper1)) ? (scalar(@upper1)) : 0; |
my %DisUp = &ProcessDiscriminant(\@UpList); |
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my %DisLow = &ProcessDiscriminant(\@LowList); |
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return (\%DisUp, \%DisLow); |
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} |
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#---- END Problem Statistics Web Page ---------------------------------------- |
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#---- Problem Statistics Graph Web Page -------------------------------------- |
my $lower1Sum=0; |
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foreach my $name (@lower1) { |
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$lower1Sum += $cache->{"$name:$problem:$part:awarded"}; |
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} |
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$lower1Sum /= (scalar(@lower1)) ? (scalar(@lower1)) : 0; |
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# ------------------------------------------- Prepare data for Graphical chart |
$data->{$_.':discriminationFactor1'} = $upper1Sum - $lower1Sum; |
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sub BuildGraphicChart { |
# Discrimination Factor 2 |
my ($graph,$cacheDB,$courseDescription,$r)=@_; |
my @upper2 = split(':::', $data->{'studentsUpperListCriterion2'}); |
my %cache; |
my @lower2 = split(':::', $data->{'studentsLowerListCriterion2'}); |
my $max = 0; |
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unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) { |
my $upper2Sum=0; |
return '<html><body>Unable to tie database.</body></html>'; |
foreach my $name (@upper2) { |
} |
$upper2Sum += $cache->{"$name:$problem:$part:awarded"}; |
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my @problems = split(':::', $cache{'problemList'}); |
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my @values = (); |
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foreach (@problems) { |
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my $data = 0; |
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if($graph eq 'DoDiffGraph') { |
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$data = sprintf("%.2f", $cache{$_.':degreeOfDifficulty'}), |
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} else { |
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$data = sprintf("%.1f", $cache{$_.':percentWrong'}), |
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} |
} |
if($max < $data) { |
$upper2Sum /= (scalar(@upper2)) ? (scalar(@upper2)) : 0; |
$max = $data; |
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} |
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push(@values, $data); |
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} |
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untie(%cache); |
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my $sendValues = join(',', @values); |
my $lower2Sum=0; |
# my $sendCount = $#values; |
foreach my $name (@lower2) { |
my $sendCount = scalar(@values); |
$lower2Sum += $cache->{"$name:$problem:$part:awarded"}; |
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} |
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$lower2Sum /= (scalar(@lower2)) ? (scalar(@lower2)) : 0; |
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my $title = ''; |
$data->{$_.':discriminationFactor2'} = $upper2Sum - $lower2Sum; |
if($graph eq 'DoDiffGraph') { |
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$title = 'Degree-of-Difficulty'; |
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} else { |
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$title = 'Wrong-Percentage'; |
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} |
} |
my @GData = ($courseDescription, 'Problems', $title, $max, $sendCount, |
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$sendValues); |
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$r->print('</form>'."\n"); |
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$r->print('<IMG src="/cgi-bin/graph.gif?'.(join('&', @GData)).'" border="1" />'); |
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$r->print('<form>'."\n"); |
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return; |
return; |
} |
} |
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#---- END Problem Statistics Web Page ---------------------------------------- |
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1; |
1; |
__END__ |
__END__ |