--- loncom/interface/statistics/lonproblemstatistics.pm 2004/03/29 19:41:24 1.76
+++ loncom/interface/statistics/lonproblemstatistics.pm 2004/04/01 20:02:56 1.79
@@ -1,6 +1,6 @@
# The LearningOnline Network with CAPA
#
-# $Id: lonproblemstatistics.pm,v 1.76 2004/03/29 19:41:24 matthew Exp $
+# $Id: lonproblemstatistics.pm,v 1.79 2004/04/01 20:02:56 matthew Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -61,6 +61,7 @@ use Apache::lonstathelpers();
use Time::HiRes;
my @StatsArray;
+my %SeqStat; # keys are symbs, values are hash refs
##
## Localization notes:
@@ -69,6 +70,31 @@ my @StatsArray;
## header for plots created with Graph.pm, both of which more than likely do
## not support localization.
##
+#
+#
+##
+## Description of Field attributes
+##
+## Attribute Required Value Meaning or Use
+##
+## name yes any scalar Used to uniquely identify field
+## title yes any scalar This is what the user sees to identify
+## the field. Passed through &mt().
+## long_title yes any scalar Used as graph heading and in excel
+## output. NOT translated
+## align no (left|right|center) HTML cell contents alignment
+## color yes html color HTML cell background color
+## used to visually group statistics
+## special no (link) Indicates a link, target is name.link
+## Currently set in &get_statistics()
+## graphable no (yes|no) Can a bar graph of the field be
+## produced?
+## sortable no (yes|no) Should a sort link be put in the
+## column header?
+## selectable yes (yes|no) Can the column be removed from the
+## statistics display?
+## selected yes (yes|no) Is the column selected by default?
+##
my @Fields = (
{ name => 'problem_num',
title => 'P#',
@@ -186,7 +212,7 @@ my @Fields = (
sortable => 'yes',
graphable => 'yes',
long_title => 'Number of Students able to Solve',
- selectable => 'no',
+ selectable => 'yes',
selected => 'yes',
},
{ name => 'num_override',
@@ -236,6 +262,150 @@ my @Fields = (
},
);
+my @SeqFields = (
+ { name => 'title',
+ title => 'Sequence',
+ align => 'left',
+ color => '#FFFFE6',
+ special => 'no',
+ sortable => 'no',
+ selectable => 'yes',
+ selected => 'no',
+ },
+ { name => 'items',
+ title => '#Items',
+ align => 'right',
+ color => '#FFFFE6',
+ format => '%4d',
+ sortable => 'no',
+ graphable => 'no',
+ long_title => 'Number of Items in Sequence',
+ selectable => 'yes',
+ selected => 'no',
+ },
+ { name => 'scoremean',
+ title => 'Score Mean',
+ align => 'right',
+ color => '#FFFFE6',
+ format => '%4.2f',
+ sortable => 'no',
+ graphable => 'no',
+ long_title => 'Mean Sequence Score',
+ selectable => 'yes',
+ selected => 'no',
+ },
+ { name => 'scorestd',
+ title => 'Score STD',
+ align => 'right',
+ color => '#FFFFE6',
+ format => '%4.2f',
+ sortable => 'no',
+ graphable => 'no',
+ long_title => 'Standard Deviation of Sequence Scores',
+ selectable => 'yes',
+ selected => 'no',
+ },
+ { name => 'scoremax',
+ title => 'Score Max',
+ align => 'right',
+ color => '#FFFFE6',
+ format => '%4.2f',
+ sortable => 'no',
+ graphable => 'no',
+ long_title => 'Maximum Sequence Score',
+ selectable => 'yes',
+ selected => 'no',
+ },
+ { name => 'scoremin',
+ title => 'Score Min',
+ align => 'right',
+ color => '#FFFFE6',
+ format => '%4.2f',
+ sortable => 'no',
+ graphable => 'no',
+ long_title => 'Minumum Sequence Score',
+ selectable => 'yes',
+ selected => 'no',
+ },
+ { name => 'scorecount',
+ title => 'Score N',
+ align => 'right',
+ color => '#FFFFE6',
+ format => '%4d',
+ sortable => 'no',
+ graphable => 'no',
+ long_title => 'Number of Students in score computations',
+ selectable => 'yes',
+ selected => 'no',
+ },
+ { name => 'countmean',
+ title => 'Count Mean',
+ align => 'right',
+ color => '#FFFFFF',
+ format => '%4.2f',
+ sortable => 'no',
+ graphable => 'no',
+ long_title => 'Mean Sequence Score',
+ selectable => 'yes',
+ selected => 'no',
+ },
+ { name => 'countstd',
+ title => 'Count STD',
+ align => 'right',
+ color => '#FFFFFF',
+ format => '%4.2f',
+ sortable => 'no',
+ graphable => 'no',
+ long_title => 'Standard Deviation of Sequence Scores',
+ selectable => 'yes',
+ selected => 'no',
+ },
+ { name => 'countmax',
+ title => 'Count Max',
+ align => 'right',
+ color => '#FFFFFF',
+ format => '%4.2f',
+ sortable => 'no',
+ graphable => 'no',
+ long_title => 'Maximum Number of Correct Problems',
+ selectable => 'yes',
+ selected => 'no',
+ },
+ { name => 'countmin',
+ title => 'Count Min',
+ align => 'right',
+ color => '#FFFFFF',
+ format => '%4.2f',
+ sortable => 'no',
+ graphable => 'no',
+ long_title => 'Minumum Number of Correct Problems',
+ selectable => 'yes',
+ selected => 'no',
+ },
+ { name => 'count',
+ title => 'Count N',
+ align => 'right',
+ color => '#FFFFFF',
+ format => '%4d',
+ sortable => 'no',
+ graphable => 'no',
+ long_title => 'Number of Students in score computations',
+ selectable => 'yes',
+ selected => 'no',
+ },
+ { name => 'KR-21',
+ title => 'KR-21',
+ align => 'right',
+ color => '#FFAAAA',
+ format => '%4.2f',
+ sortable => 'no',
+ graphable => 'no',
+ long_title => 'KR-21 reliability statistic',
+ selectable => 'yes',
+ selected => 'no',
+ },
+);
+
my %SelectedFields;
sub parse_field_selection {
@@ -369,7 +539,8 @@ sub BuildProblemStatisticsPage {
'statsoutputmode' => 'scalar',
'Section' => 'array',
'StudentData' => 'array',
- 'Maps' => 'array');
+ 'Maps' => 'array',
+ 'fieldselections'=> 'array');
&Apache::loncommon::store_course_settings('statistics',
\%Saveable_Parameters);
&Apache::loncommon::restore_course_settings('statistics',
@@ -379,6 +550,7 @@ sub BuildProblemStatisticsPage {
#
# Clear the package variables
undef(@StatsArray);
+ undef(%SeqStat);
#
# Finally let the user know we are here
my $interface = &CreateInterface();
@@ -415,7 +587,7 @@ sub BuildProblemStatisticsPage {
} else {
my $count = 0;
foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
- $count += $seq->{'num_assess'};
+ $count += $seq->{'num_assess_parts'};
}
if ($count > 10) {
$r->print(''.
@@ -434,17 +606,40 @@ sub BuildProblemStatisticsPage {
undef($plot);
}
if ($sortby eq 'container' && ! defined($plot)) {
+ &output_sequence_statistics($r);
&output_html_by_sequence($r);
} else {
if (defined($plot)) {
&make_plot($r,$plot);
}
&output_html_stats($r);
+ &output_sequence_statistics($r);
}
}
return;
}
+sub output_sequence_statistics {
+ my ($r) = @_;
+ my $c=$r->connection();
+ $r->print(''.&mt('Sequence Statistics').'
');
+ $r->print('
'."\n".
+ ''."\n".
+ '');
+ $r->print(&sequence_html_header());
+ foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
+ last if ($c->aborted);
+ next if ($seq->{'num_assess'} < 1);
+ &compute_sequence_statistics($seq);
+ $r->print(&sequence_html_output($seq));
+ }
+ $r->print(' ');
+ $r->print(' |
');
+ $r->rflush();
+ return;
+}
+
+
##########################################################
##########################################################
##
@@ -583,6 +778,46 @@ sub statistics_table_header {
return $header_row;
}
+sub sequence_html_header {
+ my $Str .= '';
+ foreach my $field (@SeqFields) {
+# next if ($field->{'selected'} ne 'yes');
+ $Str .= '| {'title'}.' | ';
+ }
+ $Str .= '
';
+ return $Str;
+}
+
+
+sub sequence_html_output {
+ my ($seq) = @_;
+ my $data = $SeqStat{$seq->{'symb'}};
+# $SeqStat{$symb}->{'max'}
+# $SeqStat{$symb}->{'min'}
+# $SeqStat{$symb}->{'mean'}
+# $SeqStat{$symb}->{'std'}
+# $SeqStat{$symb}->{'count'}
+# $SeqStat{$symb}->{'max_possible'}
+ my $row = '';
+ foreach my $field (@SeqFields) {
+# next if ($field->{'selected'} ne 'yes');
+ $row .= '| {'align'})) {
+ $row .= ' align="'.$field->{'align'}.'"';
+ }
+ $row .= '>';
+ if (exists($field->{'format'})) {
+ $row .= sprintf($field->{'format'},$data->{$field->{'name'}});
+ } else {
+ $row .= $data->{$field->{'name'}};
+ }
+ $row .= ' | ';
+ }
+ $row .= '
'."\n";
+ return $row;
+}
+
####################################################
####################################################
##
@@ -1147,7 +1382,6 @@ sub get_statistics {
return $data;
}
-
###############################################
###############################################
@@ -1204,6 +1438,70 @@ sub compute_discrimination_factor {
###############################################
###############################################
+##
+## Compute KR-21
+##
+## To compute KR-21, you need the following information:
+##
+## K=the number of items in your test
+## M=the mean score on the test
+## s=the standard deviation of the scores on your test
+##
+## then:
+##
+## KR-21 rk= [K/(K-1)] * [1- (M*(K-M))/(K*s^2))]
+##
+###############################################
+###############################################
+sub compute_sequence_statistics {
+ my ($seq) = @_;
+ my $symb = $seq->{'symb'};
+ my @Resources;
+ foreach my $res (@{$seq->{'contents'}}) {
+ next if ($res->{'type'} ne 'assessment');
+ push (@Resources,$res->{'symb'});
+ }
+ my ($starttime,$endtime) = &Apache::lonstathelpers::get_time_limits();
+ #
+ # First compute statistics based on student scores
+ my ($smin,$smax,$sMean,$sSTD,$scount,$sMAX) =
+ &Apache::loncoursedata::score_stats
+ (\@Apache::lonstatistics::SelectedSections,
+ $Apache::lonstatistics::enrollment_status,
+ \@Resources,$starttime,$endtime,undef);
+ $SeqStat{$symb}->{'title'} = $seq->{'title'};
+ $SeqStat{$symb}->{'scoremax'} = $smax;
+ $SeqStat{$symb}->{'scoremin'} = $smin;
+ $SeqStat{$symb}->{'scoremean'} = $sMean;
+ $SeqStat{$symb}->{'scorestd'} = $sSTD;
+ $SeqStat{$symb}->{'scorecount'} = $scount;
+ $SeqStat{$symb}->{'max_possible'} = $sMAX;
+ #
+ # Compute statistics based on the number of correct problems
+ # 'correct' is taken to mean
+ my ($cmin,$cmax,$cMean,$cSTD,$ccount)=
+ &Apache::loncoursedata::count_stats
+ (\@Apache::lonstatistics::SelectedSections,
+ $Apache::lonstatistics::enrollment_status,
+ \@Resources,$starttime,$endtime,undef);
+ my $K = $seq->{'num_assess_parts'};
+ my $kr_21;
+ if ($K > 1 && $cSTD > 0) {
+ $kr_21 = ($K/($K-1)) * (1 - $cMean*($K-$cMean)/($K*$cSTD**2));
+ } else {
+ $kr_21 = 'nan';
+ }
+ $SeqStat{$symb}->{'countmax'} = $cmax;
+ $SeqStat{$symb}->{'countmin'} = $cmin;
+ $SeqStat{$symb}->{'countstd'} = $cSTD;
+ $SeqStat{$symb}->{'count'} = $ccount;
+ $SeqStat{$symb}->{'items'} = $K;
+ $SeqStat{$symb}->{'KR-21'}=$kr_21;
+
+ return;
+}
+
+
=pod
@@ -1264,111 +1562,6 @@ Number of Students had at least one disc
=cut
-
-############################################################
-############################################################
-##
-## How this all works:
-## Statistics are computed by calling &get_statistics with the sequence,
-## resource, and part id to run statistics on. At various places within
-## the loops which compute the statistics, as well as before and after
-## the entire process, subroutines can be called. The subroutines are
-## registered to the following hooks:
-##
-## hook subroutine inputs
-## ----------------------------------------------------------
-## pre $r,$count
-## pre_seq $r,$count,$seq
-## pre_res $r,$count,$seq,$res
-## calc $r,$count,$seq,$res,$data
-## post_res $r,$count,$seq,$res
-## post_seq $r,$count,$seq
-## post $r,$count
-##
-## abort $r
-##
-## subroutines will be called in the order in which they are registered.
-##
-############################################################
-############################################################
-{
-
-my %hooks;
-my $aborted = 0;
-
-sub abort_computation {
- $aborted = 1;
-}
-
-sub clear_hooks {
- $aborted = 0;
- undef(%hooks);
-}
-
-sub register_hook {
- my ($hookname,$subref)=@_;
- if ($hookname !~ /^(pre|pre_seq|pre_res|post|post_seq|post_res|calc)$/){
- return;
- }
- if (ref($subref) ne 'CODE') {
- &Apache::lonnet::logthis('attempt to register hook to non-code: '.
- $hookname,' = '.$subref);
- } else {
- if (exists($hooks{$hookname})) {
- push(@{$hooks{$hookname}},$subref);
- } else {
- $hooks{$hookname} = [$subref];
- }
- }
- return;
-}
-
-sub run_hooks {
- my $context = shift();
- foreach my $hook (@{$hooks{$context}}) {
- if ($aborted && $context ne 'abort') {
- last;
- }
- my $retvalue = $hook->(@_);
- if (defined($retvalue) && $retvalue eq '0') {
- $aborted = 1 if (! $aborted);
- }
- }
-}
-
-sub run_statistics {
- my ($r) = @_;
- my $count = 0;
- &run_hooks('pre',$r,$count);
- foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
- last if ($aborted);
- next if ($seq->{'num_assess'}<1);
- &run_hooks('pre_seq',$r,$count,$seq);
- foreach my $res (@{$seq->{'contents'}}) {
- last if ($aborted);
- next if ($res->{'type'} ne 'assessment');
- &run_hooks('pre_res',$r,$count,$seq,$res);
- foreach my $part (@{$res->{'parts'}}) {
- last if ($aborted);
- #
- # This is where all the work happens
- my $data = &get_statistics($seq,$res,$part,++$count);
- &run_hooks('calc',$r,$count,$seq,$res,$part,$data);
- }
- &run_hooks('post_res',$r,$count,$seq,$res);
- }
- &run_hooks('post_seq',$r,$count,$seq);
- }
- if ($aborted) {
- &run_hooks('abort',$r);
- } else {
- &run_hooks('post',$r,$count);
- }
- return;
-}
-
-} # End of %hooks scope
-
############################################################
############################################################