". + $ENV{'course.'.$ENV{'request.course.id'}.'.description'}. + "
\n"); + $r->print("".localtime(time)."
"); + $r->rflush(); + if ($show eq 'grouped') { + &output_html_grouped_by_sequence($r); + } elsif ($show eq 'ungrouped') { + &output_html_ungrouped($r); + } + } elsif ($output_mode eq 'excel') { + $r->print("Preparing Excel Spreadsheet
"); + &output_excel($r); + } elsif ($output_mode eq 'plot') { + if ($show eq 'deg of diff') { + &plot_statistics($r,'DoDiff'); + } elsif ($show eq 'per wrong') { + &plot_statistics($r,'%Wrng'); + } + } else { + $r->print("Not implemented
"); + } + return; } -sub BuildStatisticsTable { - my ($cache,$displayFormat,$orderedProblems,$headings,$r,$color)=@_; +############################################### +############################################### + +=pod + +=item &output_html_grouped_by_sequence() -#6666666 -# my $file="/home/httpd/perl/tmp/183d.txt"; -# open(OUT, ">$file"); -#6666666 -## &Apache::lonstatistics::Create_PrgWin($r); -##777777 -## my (%Activity) = &LoadActivityLog(); -## $r->print(''); -## my ($doDiffFile) = &LoadDoDiffFile(); +Presents the statistics data as an html table organized by the order +the assessments appear in the course. -##777777 -## $Str .= &Classify($discriminantFactor, $students); +=cut - if($displayFormat ne 'Display CSV Format') { +############################################### +############################################### +sub output_html_grouped_by_sequence { + my ($r) = @_; + my $problem_num = 0; + #$r->print(&ProblemStatisticsLegend()); + my @Header = ("Title","Part","#Stdnts","Tries","Mod", + "Mean","#YES","#yes","%Wrng","DoDiff", + "S.D.","Skew.");#,"D.F.1st","D.F.2nd"); + # #FFFFE6 #EEFFCC #DDFFFF FFDDDD #DDFFDD #FFDDFF + foreach my $sequence (&Apache::lonstatistics::Sequences_with_Assess()) { + next if ($sequence->{'num_assess'}<1); + $r->print("".$sequence->{'title'}."
"); $r->print(''."\n");
$r->print('
|
'.$out.'&'.$DoD); -# print (OUT $out.'@'.$DoD.'&'); -#6666666 - -#check with Gerd -# $urlres=~/^(\w+)\/(\w+)/; -# if ($StdNo) { -# &Apache::lonnet::put('nohist_resevaldata',\%storestats, -# $1,$2); -# } -#-------------------------------- Row of statistical table - &TableRow($displayFormat,$tableData,$count,$r,$color); - $count++; - } - if($cache->{'DisplayFormat'} ne 'Display CSV Format') { - $r->print(''."\n"); - } - $r->print(''); -#6666666 -# close( OUT ); -#666666 + # return; } -sub TableRow { - my ($displayFormat,$Str,$RealIdx,$r,$color)=@_; - my($ref,$title,$source,$StdNo,$TotalTries,$MxTries,$Avg,$YES,$Override, - $Wrng,$DoD,$SD,$Sk,$_D1,$_D2,$DiscNo,$Prob)=split(/\&/,$Str); - my $Ptr; - if($displayFormat eq 'Display CSV Format') { - $Ptr="\n".'
'. - "\n".'"'.$RealIdx.'",'. - "\n".'"'.$title.'",'. - "\n".'"'.$source.'",'. - "\n".'"'.$StdNo.'",'. - "\n".'"'.$TotalTries.'",'. - "\n".'"'.$MxTries.'",'. - "\n".'"'.$Avg.'",'. - "\n".'"'.$YES.'",'. - "\n".'"'.$Override.'",'. - "\n".'"'.$Wrng.'",'. - "\n".'"'.$DoD.'",'. - "\n".'"'.$SD.'",'. - "\n".'"'.$Sk.'",'. - "\n".'"'.$_D1.'",'. - "\n".'"'.$_D2.'"'. - "\n".'"'.$DiscNo.'"'; +############################################### +############################################### + +=pod - $r->print("\n".$Ptr); +=item &output_html_ungrouped() + +Presents the statistics data in a single html table which can be sorted by +different columns. + +=cut + +############################################### +############################################### +sub output_html_ungrouped { + my ($r,$option) = @_; + # + my $problem_num = 0; + my $show_container = 0; + my $show_part = 0; + #$r->print(&ProblemStatisticsLegend()); + my @Header = ("Title","Part","#Stdnts","Tries","Mod", + "Mean","#YES","#yes","%Wrng","DoDiff", + "S.D.","Skew");#,"D.F.1st","D.F.2nd"); + # + my $sortby = undef; + foreach (@Header) { + if ($ENV{'form.sortby'} eq $_) { + $sortby = $_; + } + } + if (! defined($sortby) || $sortby eq '') { + $sortby = 'Container'; + } + # If there is more than one sequence, list their titles + my @Sequences = &Apache::lonstatistics::Sequences_with_Assess(); + if (@Sequences > 1) { + unshift(@Header,"Container"); + $show_container = 1; + } + # + # If the option for showing the problem number is needed, push that + # on the list too + if (defined($option) && $option =~ /show probnum/) { + unshift(@Header,"P#"); + } + # + $r->print('
'."\n");
+ $r->rflush();
+ #
+ # Compile the data
+ my @Statsarray;
+ foreach my $sequence (@Sequences) {
+ next if ($sequence->{'num_assess'}<1);
+ foreach my $resource (@{$sequence->{'contents'}}) {
+ next if ($resource->{'type'} ne 'assessment');
+ foreach my $part (@{$resource->{'parts'}}) {
+ $problem_num++;
+ my ($num,$tries,$mod,$mean,$Solved,$solved,$DegOfDiff,$STD,
+ $SKEW) = &get_statistics($resource->{'symb'},$part);
+ #
+ $show_part = 1 if ($part ne '0');
+ $part = ' ' if ($part == 0);
+ #
+ my $wrongpercent = 0;
+ if (defined($num) && $num > 0) {
+ $wrongpercent=int(10*100*($num-$Solved+$solved)/$num)/10;
+ }
+ push (@Statsarray,
+ { 'sequence' => $sequence,
+ 'resource' => $resource,
+ 'Title' => $resource->{'title'},
+ 'Part' => $part,
+ '#Stdnts' => $num,
+ 'Tries' => $tries,
+ 'Mod' => $mod,
+ 'Mean' => $mean,
+ '#YES' => $Solved,
+ '#yes' => $solved,
+ '%Wrng' => $wrongpercent,
+ 'DoDiff' => $DegOfDiff,
+ 'S.D.' => $STD,
+ 'Skew' => $SKEW,
+ 'problem_num' => $problem_num,
+ });
+ }
+ }
+ }
+ #
+ # Table Headers
+ $r->print('
|
'. + 'Your Excel spreadsheet.'."\n"); + $r->rflush(); + return; +} - return $Ptr; +############################################### +############################################### + +=pod + +=item &statistics_html_table_data() + +Help function used to format the rows for HTML table output. + +=cut + +############################################### +############################################### +sub statistics_html_table_data { + my ($resource,$part,$num,$tries,$mod,$mean,$Solved,$solved,$wrongpercent, + $DegOfDiff,$STD,$SKEW,$options) = @_; + my $row = ''; + $row .= '
".&DrawGraph(\@Data,$title,'Problem Number',$yaxis, + $Max)."
\n"); + # + # Print out the data + $ENV{'form.sortby'} = 'Contents'; + &output_html_ungrouped($r,'show probnum'); + return; } +############################################### +############################################### + +=pod + +=item &DrawGraph() + +=cut + +############################################### +############################################### +sub DrawGraph { + my ($values,$title,$xaxis,$yaxis,$Max)=@_; + $title = '' if (! defined($title)); + $xaxis = '' if (! defined($xaxis)); + $yaxis = '' if (! defined($yaxis)); + # + my $sendValues = join(',', @$values); + my $sendCount = scalar(@$values); + if ( $Max > 1 ) { + if ($Max % 10) { + if ( int($Max) < $Max ) { + $Max++; + $Max = int($Max); + } + } + } else { + $Max = 1; + } + my @GData = ($title,$xaxis,$yaxis,$Max,$sendCount,$sendValues); + return ').')
';
+}
+
+sub get_statistics {
+ my ($symb,$part) = @_;
+ #
+ my $courseid = $ENV{'request.course.id'};
+ #
+ my $students = \@Apache::lonstatistics::Students;
+ if ($Apache::lonstatistics::SelectedSections[0] eq 'all') {
+ $students = undef;
+ }
+ my @Results = &Apache::loncoursedata::get_problem_statistics
+ ($students,$symb,$part,$courseid);
+ return @Results;
+}
+
+###############################################
+###############################################
+
+=pod
+
+=item &ProblemStatisticsLegend()
+
+=cut
+
+###############################################
+###############################################
sub ProblemStatisticsLegend {
my $Ptr = '';
$Ptr = '| 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 .= '[Criterion to group students into %27 Upper Students - '; + $Ptr .= 'and %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: '; @@ -378,298 +916,10 @@ sub ProblemStatisticsLegend { $Ptr .= ' | |
| Disc. | '; $Ptr .= 'Number of Students had at least one discussion.'; $Ptr .= ' |
$nIndex) $sortedList[$nIndex]"); - ($Problem,$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).':'.($Sum2/$nStudent); -# $jr->print("
$nIndex) $Temp --> ($nStudent) $Proc{$Temp}"); - $Sum1=0; - $Sum2=0; - $nStudent=0; - } - - return %Proc; -} - -#------- Creating Discimination factor -sub Discriminant { - my ($discriminant)=@_; - my @discriminantKeys=keys(%$discriminant); - 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 $str=$discriminant->{$key}; - foreach(split(/\&/,$str)){ - if($_) { - if($low<$UpCnt) { push(@LowList,$_); } - else { push(@UpList,$_); } - } - } - } - } - my %DisUp = &ProcessDiscriminant(\@UpList); - my %DisLow = &ProcessDiscriminant(\@LowList); - - return (\%DisUp, \%DisLow); -} - #---- END Problem Statistics Web Page ---------------------------------------- -#---- Problem Statistics Graph Web Page -------------------------------------- - -# ------------------------------------------- Prepare data for Graphical chart - -sub BuildGraphicChart { - my ($graph,$cacheDB,$courseDescription,$r)=@_; - my %cache; - my $max = 0; - - unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) { - return 'Unable to tie database.'; - } - - my @problems = split(':::', $cache{'problemList'}); - my @values = (); - foreach (@problems) { - my $data = 0; - if($graph eq 'DoDiffGraph') { - $data = sprintf("%.2f", $cache{$_.':degreeOfDifficulty'}), - } else { - $data = sprintf("%.1f", $cache{$_.':percentWrong'}), - } - if($max < $data) { - $max = $data; - } - push(@values, $data); - } - untie(%cache); - - my $sendValues = join(',', @values); -# my $sendCount = $#values; - my $sendCount = scalar(@values); - - my $title = ''; - if($graph eq 'DoDiffGraph') { - $title = 'Degree-of-Difficulty'; - } else { - $title = 'Wrong-Percentage'; - } - my @GData = ($courseDescription, 'Problems', $title, $max, $sendCount, - $sendValues); - - $r->print(''."\n"); - $r->print('
).')
');
- $r->print('