". + $ENV{'course.'.$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 { + $r->print("Not implemented
"); + } return; } +############################################### +############################################### -#---- Problem Statistics Web Page --------------------------------------- +=pod -sub CreateProblemStatisticsTableHeading { - my ($headings,$r)=@_; +=item &output_html_grouped_by_sequence() - my $Str=''; - $Str .= '".$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); -# $GraphDat->{'GraphGif:'.($count-1)}=$DoD.':'.$Wrng; - $count++; - } -# $TempCache{'ProblemCount'}=$count; - if($cache->{'DisplayFormat'} ne 'Display CSV Format') { - $r->print(''."\n"); - } - $r->print(''); -#6666666 -# close( OUT ); -#666666 - return \%TempCache; + # + return; } -=pod -sub CacheStatisticsTable { - my ($state,$cache,$headings,$r,$color)=@_; - my @list = (); - my %TempCache; - my %myHeader = reverse( %$headings ); - my $pos = $myHeader{$state}; - if ($pos > 0) {$pos++;} - my $p_count = $cache->{'ProblemCount'}; - - for ( my $k=0; $k<$p_count;$k++) { - my $key=$cache->{'CacheTable:'.$k}; - my @Temp=split(/\&/,$key); - $list[$k]=$Temp[$pos].'+'.$key; +############################################### +############################################### + +=pod + +=item &output_html_ungrouped() + +Presents the statistics data in a single html table which can be sorted by +different columns. + +=cut + +############################################### +############################################### +sub output_html_ungrouped { + my ($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 = $_; + } } - - if ($pos>0) { - @list = sort OrderedSort (@list); + 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
+ $r->print('
|
'. - "\n".'"'.$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 + +=item &output_excel() + +Presents the statistical data in an Excel 95 compatable spreadsheet file. - $r->print("\n".$Ptr); +=cut + +############################################### +############################################### +sub output_excel { + my ($r) = @_; + my $filename = '/prtspool/'. + $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'. + time.'_'.rand(1000000000).'.xls'; + # + my $excel_workbook = undef; + my $excel_sheet = undef; + # + my $rows_output = 0; + my $cols_output = 0; + # + # Create sheet + $excel_workbook = Spreadsheet::WriteExcel->new('/home/httpd'.$filename); + # + # Check for errors + if (! defined($excel_workbook)) { + $r->log_error("Error creating excel spreadsheet $filename: $!"); + $r->print("Problems creating new Excel file. ". + "This error has been logged. ". + "Please alert your LON-CAPA administrator"); + return ; + } + # + # The excel spreadsheet stores temporary data in files, then put them + # together. If needed we should be able to disable this (memory only). + # The temporary directory must be specified before calling 'addworksheet'. + # File::Temp is used to determine the temporary directory. + $excel_workbook->set_tempdir($Apache::lonnet::tmpdir); + # + # Add a worksheet + my $sheetname = $ENV{'course.'.$ENV{'request.course.id'}.'.description'}; + if (length($sheetname) > 31) { + $sheetname = substr($sheetname,0,31); + } + $excel_sheet = $excel_workbook->addworksheet($sheetname); + # + # Put the course description in the header + $excel_sheet->write($rows_output,$cols_output++, + $ENV{'course.'.$ENV{'request.course.id'}.'.description'}); + $cols_output += 3; + # + # Put a description of the sections listed + my $sectionstring = ''; + my @Sections = @Apache::lonstatistics::SelectedSections; + if (scalar(@Sections) > 1) { + if (scalar(@Sections) > 2) { + my $last = pop(@Sections); + $sectionstring = "Sections ".join(', ',@Sections).', and '.$last; + } else { + $sectionstring = "Sections ".join(' and ',@Sections); + } } else { - $Ptr="\n".'
'. + 'Your Excel spreadsheet.'."\n"); + $r->rflush(); return; } -# For loading the colored table for display or un-colored for print -sub setbgcolor { - my $PrintTable=shift; - my %color; - if ($PrintTable){ - $color{"gb"}="#FFFFFF"; - $color{"red"}="#FFFFFF"; - $color{"yellow"}="#FFFFFF"; - $color{"green"}="#FFFFFF"; - $color{"purple"}="#FFFFFF"; - } else { - $color{"gb"}="#DDFFFF"; - $color{"red"}="#FFDDDD"; - $color{"yellow"}="#EEFFCC"; - $color{"green"}="#DDFFDD"; - $color{"purple"}="#FFDDFF"; - } - - return \%color; -} - -sub ProblemStatisticsButtons { - my ($displayFormat, $displayLegend)=@_; - - my $Ptr = '
".&DrawGraph(\@Data,$title,'Problem Number',$yaxis, + $Max)."
\n"); + # + # Print out the data + $ENV{'form.sortby'} = 'Contents'; + &output_html_ungrouped($r,'show probnum'); + return; +} - return $Ptr; +############################################### +############################################### + +=pod + +=item &DrawGraph() + +=cut + +############################################### +############################################### +sub DrawGraph { + my ($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: '; @@ -438,308 +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,$_); } - } - } - } - } - my %DisUp = &ProcessDiscriminant(\@UpList); - my %DisLow = &ProcessDiscriminant(\@LowList); - - return (\%DisUp, \%DisLow); -} - #---- END Problem Statistics Web Page ---------------------------------------- -#---- Problem Statistics Graph Web Page -------------------------------------- - -# ------------------------------------------- Prepare data for Graphical chart - -sub BuildGraphicChart { - my ($ylab,$r,$cacheDB)=@_; - my %cache; - my $Col; - my $data=''; - my $count = 0; - my $Max = 0; - - unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) { - return 'Unable to tie database.'; - } - - my $p_count = $cache{'ProblemCount'}; - - for ( my $k=0; $k<$p_count;$k++) { - my @Temp=split(/\:/,$cache{'GraphGif:'.$k}); - my $inf = $Temp[$Col]; - if ( $Max < $inf ) {$Max = $inf;} - $data .= $inf.','; - $count++; - } - untie(%cache); -# $r->print("
count=$p_count >>data= $data"); - - if ( $Max > 1 ) { - $Max += (10 - $Max % 10); - $Max = int($Max); - } else { $Max = 1; } - - my $cid=$ENV{'request.course.id'}; - - if ( $ylab eq 'DoDiff Graph' ) { - $ylab = 'Degree-of-Difficulty'; - $Col = 0; - } else { - $ylab = 'Wrong-Percentage'; - $Col = 1; - } - my $Course = $ENV{'course.'.$cid.'.description'}; - $Course =~ s/\ /"_"/eg; - my $GData=$Course.'&'.'Problems#'.'&'.$ylab.'&'. - $Max.'&'.$count.'&'.$data; - - $r->print('
');
-
- return;
-}
-
1;
__END__