Annotation of loncom/interface/statistics/lonproblemanalysis.pm, revision 1.104
1.1 stredwic 1: # The LearningOnline Network with CAPA
2: #
1.104 ! matthew 3: # $Id: lonproblemanalysis.pm,v 1.103 2004/11/10 16:56:39 matthew Exp $
1.1 stredwic 4: #
5: # Copyright Michigan State University Board of Trustees
6: #
7: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
8: #
9: # LON-CAPA is free software; you can redistribute it and/or modify
10: # it under the terms of the GNU General Public License as published by
11: # the Free Software Foundation; either version 2 of the License, or
12: # (at your option) any later version.
13: #
14: # LON-CAPA is distributed in the hope that it will be useful,
15: # but WITHOUT ANY WARRANTY; without even the implied warranty of
16: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17: # GNU General Public License for more details.
18: #
19: # You should have received a copy of the GNU General Public License
20: # along with LON-CAPA; if not, write to the Free Software
21: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22: #
23: # /home/httpd/html/adm/gpl.txt
24: #
25: # http://www.lon-capa.org/
26: #
1.11 minaeibi 27: package Apache::lonproblemanalysis;
1.1 stredwic 28:
29: use strict;
30: use Apache::lonnet();
1.25 matthew 31: use Apache::loncommon();
1.7 stredwic 32: use Apache::lonhtmlcommon();
1.23 matthew 33: use Apache::loncoursedata();
34: use Apache::lonstatistics;
35: use Apache::lonlocal;
1.71 matthew 36: use Apache::lonstathelpers();
37: use Apache::lonstudentsubmissions();
1.37 matthew 38: use HTML::Entities();
1.42 matthew 39: use Time::Local();
1.43 matthew 40: use Spreadsheet::WriteExcel();
1.2 stredwic 41:
1.40 matthew 42: my $plotcolors = ['#33ff00',
43: '#0033cc', '#990000', '#aaaa66', '#663399', '#ff9933',
44: '#66ccff', '#ff9999', '#cccc33', '#660000', '#33cc66',
45: ];
1.39 matthew 46:
1.54 matthew 47: my @SubmitButtons = ({ name => 'PrevProblemAnalysis',
48: text => 'Previous Problem' },
49: { name => 'ProblemAnalysis',
1.46 matthew 50: text => 'Analyze Problem Again' },
1.54 matthew 51: { name => 'NextProblemAnalysis',
52: text => 'Next Problem' },
53: { name => 'break'},
1.46 matthew 54: { name => 'SelectAnother',
1.53 matthew 55: text => 'Choose a different Problem' },
1.46 matthew 56: { name => 'ExcelOutput',
57: text => 'Produce Excel Output' });
58:
1.1 stredwic 59: sub BuildProblemAnalysisPage {
1.23 matthew 60: my ($r,$c)=@_;
1.49 matthew 61: #
62: my %Saveable_Parameters = ('Status' => 'scalar',
63: 'Section' => 'array',
64: 'NumPlots' => 'scalar',
65: 'AnalyzeOver' => 'scalar',
66: );
67: &Apache::loncommon::store_course_settings('problem_analysis',
68: \%Saveable_Parameters);
69: &Apache::loncommon::restore_course_settings('problem_analysis',
70: \%Saveable_Parameters);
71: #
72: &Apache::lonstatistics::PrepareClasslist();
1.48 matthew 73: #
1.25 matthew 74: $r->print(&CreateInterface());
1.28 matthew 75: #
76: my @Students = @Apache::lonstatistics::Students;
77: #
1.86 matthew 78: if (@Students < 1 && exists($ENV{'form.firstrun'})) {
1.46 matthew 79: $r->print('<h2>There are no students in the sections selected</h2>');
80: }
81: #
1.85 matthew 82: my @CacheButtonHTML =
83: &Apache::lonstathelpers::manage_caches($r,'Statistics','stats_status');
1.39 matthew 84: $r->rflush();
1.46 matthew 85: #
1.87 matthew 86: # Support for numerical and radio response isn't complete enough to
87: # include in 1.2 release.
88: # my $problem_types = '(option|radiobutton|numerical)';
1.94 matthew 89: my $problem_types = '.';#(option)';
1.33 matthew 90: if (exists($ENV{'form.problemchoice'}) &&
91: ! exists($ENV{'form.SelectAnother'})) {
1.46 matthew 92: foreach my $button (@SubmitButtons) {
1.54 matthew 93: if ($button->{'name'} eq 'break') {
94: $r->print("<br />\n");
95: } else {
96: $r->print('<input type="submit" name="'.$button->{'name'}.'" '.
97: 'value="'.&mt($button->{'text'}).'" />');
98: $r->print(' 'x5);
99: }
1.46 matthew 100: }
1.85 matthew 101: foreach my $html (@CacheButtonHTML) {
102: $r->print($html.(' 'x5));
103: }
1.31 matthew 104: #
1.25 matthew 105: $r->print('<hr />');
1.54 matthew 106: $r->rflush();
107: #
108: # Determine which problem we are to analyze
1.61 matthew 109: my $current_problem = &Apache::lonstathelpers::get_target_from_id
110: ($ENV{'form.problemchoice'});
1.54 matthew 111: #
1.61 matthew 112: my ($prev,$curr,$next) =
113: &Apache::lonstathelpers::get_prev_curr_next($current_problem,
1.66 matthew 114: $problem_types,
115: 'response',
1.61 matthew 116: );
1.54 matthew 117: if (exists($ENV{'form.PrevProblemAnalysis'}) && defined($prev)) {
118: $current_problem = $prev;
119: } elsif (exists($ENV{'form.NextProblemAnalysis'}) && defined($next)) {
120: $current_problem = $next;
121: } else {
122: $current_problem = $curr;
123: }
1.23 matthew 124: #
1.54 matthew 125: # Store the current problem choice and send it out in the form
1.61 matthew 126: $ENV{'form.problemchoice'} =
127: &Apache::lonstathelpers::make_target_id($current_problem);
1.54 matthew 128: $r->print('<input type="hidden" name="problemchoice" value="'.
129: $ENV{'form.problemchoice'}.'" />');
1.28 matthew 130: #
1.54 matthew 131: if (! defined($current_problem->{'resource'})) {
1.46 matthew 132: $r->print('resource is undefined');
133: } else {
1.54 matthew 134: my $resource = $current_problem->{'resource'};
1.44 matthew 135: $r->print('<h1>'.$resource->{'title'}.'</h1>');
1.41 matthew 136: $r->print('<h3>'.$resource->{'src'}.'</h3>');
1.91 matthew 137: if ($ENV{'form.show_prob'} eq 'true') {
138: $r->print(&Apache::lonstathelpers::render_resource($resource));
139: }
1.44 matthew 140: $r->rflush();
1.71 matthew 141: my %Data = &Apache::lonstathelpers::get_problem_data
142: ($resource->{'src'});
1.88 matthew 143: my $problem_data = $Data{$current_problem->{'part'}.
1.54 matthew 144: '.'.
145: $current_problem->{'respid'}};
146: if ($current_problem->{'resptype'} eq 'option') {
1.56 matthew 147: &OptionResponseAnalysis($r,$current_problem,
1.88 matthew 148: $problem_data,
1.47 matthew 149: \@Students);
1.54 matthew 150: } elsif ($current_problem->{'resptype'} eq 'radiobutton') {
1.97 matthew 151: &radio_response_analysis($r,$current_problem,
152: $problem_data,
153: \@Students);
1.66 matthew 154: } elsif ($current_problem->{'resptype'} eq 'numerical') {
1.103 matthew 155: &numerical_response_analysis($r,$current_problem,
156: $problem_data,\@Students);
1.47 matthew 157: } else {
1.102 matthew 158: $r->print('<h2>Analysis of '.$current_problem->{'resptype'}.' is not supported</h2>');
1.47 matthew 159: }
1.7 stredwic 160: }
1.23 matthew 161: $r->print('<hr />');
1.25 matthew 162: } else {
1.31 matthew 163: $r->print('<input type="submit" name="ProblemAnalysis" value="'.
164: &mt('Analyze Problem').'" />');
165: $r->print(' 'x5);
1.27 matthew 166: $r->print('<h3>'.&mt('Please select a problem to analyze').'</h3>');
1.61 matthew 167: $r->print(&Apache::lonstathelpers::ProblemSelector
1.66 matthew 168: ($problem_types));
1.1 stredwic 169: }
170: }
171:
1.69 matthew 172: #########################################################
173: #########################################################
174: ##
1.66 matthew 175: ## Numerical Response Routines
176: ##
177: #########################################################
178: #########################################################
1.103 matthew 179: sub numerical_response_analysis {
180: my ($r,$problem,$problem_analysis,$students) = @_;
1.79 matthew 181: my $c = $r->connection();
1.103 matthew 182: #
183: if ($ENV{'form.AnalyzeOver'} !~ /^(tries|time)$/) {
184: $r->print('Bad request');
185: }
186: #
1.82 matthew 187: my ($resource,$partid,$respid) = ($problem->{'resource'},
188: $problem->{'part'},
189: $problem->{'respid'});
1.103 matthew 190: # Gather student data
191: my $response_data = &Apache::loncoursedata::get_response_data
1.82 matthew 192: (\@Apache::lonstatistics::SelectedSections,
193: $Apache::lonstatistics::enrollment_status,
194: $resource->{'symb'},$respid);
1.103 matthew 195: #
1.104 ! matthew 196: $problem_analysis->{'answercomputed'} = 1;
! 197: if ($problem_analysis->{'answercomputed'}) {
! 198: my $answers =
! 199: &Apache::lonstathelpers::GetStudentAnswers($r,$problem,$students,
! 200: 'Statistics',
! 201: 'stats_status');
! 202: $r->print(&numerical_one_dimensional_plot($r,600,150,$answers));
! 203: }
! 204: my $analysis_html = '<table>';
1.103 matthew 205: for (my $plot_num = 1;$plot_num<=$ENV{'form.NumPlots'};$plot_num++) {
206: my $restriction_function;
1.104 ! matthew 207: my $header_message;
! 208: my $stats_message;
! 209: my $post_message; # passed through &mt sooner rather than later
! 210: my $no_data_message;
! 211: my @extra_data;
! 212: if ($ENV{'form.AnalyzeOver'} eq 'tries') {
! 213: $restriction_function = sub {($_[0]->{'tries'} == $plot_num?1:0)};
! 214: $header_message = 'Attempt [_1]';
! 215: $stats_message =
! 216: '[_1] submissions, [_2] correct, [_3] incorrect';
! 217: $post_message = '';
! 218: $no_data_message = 'No data exists for attempt [_1]';
! 219: } else {
! 220: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
! 221: ('startdate_'.$plot_num);
! 222: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
! 223: ('enddate_'.$plot_num);
! 224: ($starttime,$endtime) = &ensure_start_end_times
! 225: ($starttime,$endtime,
! 226: &get_time_from_row($response_data->[0]),
! 227: &get_time_from_row($response_data->[-1]),
! 228: $plot_num);
! 229: $header_message = 'Data from [_2] to [_3]';
! 230: $extra_data[0] = &Apache::lonlocal::locallocaltime($starttime);
! 231: $extra_data[1] = &Apache::lonlocal::locallocaltime($endtime);
! 232: #
! 233: $stats_message =
! 234: '[_1] submissions from [_4] students, [_2] correct, [_3] incorrect';
! 235: #
! 236: $post_message =
! 237: &mt('Start time: [_1]',
! 238: &Apache::lonhtmlcommon::date_setter
! 239: ('Statistics','startdate_'.$plot_num,$starttime)).
! 240: '<br />'.
! 241: &mt('End time: [_1]',
! 242: &Apache::lonhtmlcommon::date_setter
! 243: ('Statistics','enddate_'.$plot_num,$endtime));
! 244: $restriction_function =
! 245: sub {
! 246: my $t = $_[0]->{'timestamp'};
! 247: if ($t >= $starttime && $t < $endtime) {
! 248: return 1;
! 249: } else {
! 250: return 0;
! 251: }
! 252: };
! 253: $no_data_message = 'No data for [_2] to [_3]';
! 254: }
1.103 matthew 255: #
256: my ($correct,$intervals,$answers) =
257: &numerical_response_determine_intervals($r,$resource,$partid,
258: $respid,$students);
259: if ($c->aborted()) { return; };
260: #
1.104 ! matthew 261: my $responses = &numerical_classify_responses($response_data,
! 262: $correct,
! 263: $restriction_function);
! 264: if ($responses->{'_count'} == 0) {
! 265: $analysis_html.=
! 266: '<tr><td colspan="2"><font size="+1"><b>'.
! 267: &mt($no_data_message,$plot_num,@extra_data).
! 268: '</b></font></td></tr>';
! 269: } else {
! 270: $analysis_html.=
! 271: '<tr><td colspan="2" align="center"><font size="+1"><b>'.
! 272: &mt($header_message,$plot_num,@extra_data).
! 273: '</b></font></td></tr>'.
! 274: '<tr><td colspan="2" align="center">'.
! 275: &mt($stats_message,
! 276: $responses->{'_count'},
! 277: $responses->{'_correct'},
! 278: $responses->{'_count'}-$responses->{'_correct'},
! 279: $responses->{'_students'},
! 280: @extra_data).
! 281: '</td></tr>'.
! 282: '<tr>'.'<td valign="top" align="center">'.
! 283: &numerical_plot_percent($r,$responses).'</td>'.
! 284: '<td align="center" valign="top">'.
! 285: &numerical_plot_differences($r,$responses).'</td>'.
! 286: '</tr>';
! 287: }
! 288: if ($post_message ne '') {
! 289: $analysis_html .=
! 290: '<tr><td colspan="2">'.$post_message.'</td></tr>';
! 291: }
1.66 matthew 292: }
1.104 ! matthew 293: $analysis_html.='</table>';
! 294: $r->print($analysis_html);
1.78 matthew 295: #
1.103 matthew 296: return;
297: }
1.102 matthew 298:
1.103 matthew 299: sub numerical_plot_percent {
300: my ($r,$responses) = @_;
301: #
302: my $total = $responses->{'_count'};
303: return '' if ($total == 0);
304: my $minbin = 0.5;
305: while (my ($interval,$submissions) = each(%$responses)) {
306: next if ($interval =~ /^_/);
307: my ($ans,$ans_low,$ans_high) = split(" ",$interval);
308: my $low_percent = abs(($ans-$ans_low)/$ans);
309: my $high_percent = abs(($ans_high-$ans)/$ans);
310: if ($minbin > $high_percent) { $minbin = $high_percent; }
311: if ($minbin > $low_percent) { $minbin = $low_percent; }
312: }
313: #
314: my @bins;
315: if ($minbin < 1) {
1.104 ! matthew 316: @bins = ('0.1','0.5','1.0','1.5','2.0','2.5','3.0','4.0','5.0',10,20,50,100);
1.103 matthew 317: } elsif ($minbin < 2) {
1.104 ! matthew 318: @bins = ('0.5','1.0','1.5','2.0','2.5','3.0','4.0','5.0',10,20,50,100);
1.103 matthew 319: } elsif ($minbin < 5) {
320: @bins = (1,2,3,4,5,10,25,50,75,100,200);
321: } elsif ($minbin < 10) {
322: @bins = (2,4,6,8,10,12,15,20,25,30,50,75,100,200);
323: } else {
324: @bins = (5,10,15,20,25,30,50,75,100,200);
325: }
326: my @labels = (1..scalar(@bins));
327: #
328: my @correct;
329: my @incorrect;
1.104 ! matthew 330: my @count;
1.103 matthew 331: while (my ($interval,$submissions) = each(%$responses)) {
332: next if ($interval =~ /^_/);
333: my ($ans,$ans_low,$ans_high) = split(" ",$interval);
1.104 ! matthew 334: while (my ($submission,$counts) = each(%$submissions)) {
! 335: my ($correct_count,$incorrect_count) = @$counts;
1.103 matthew 336: my $scaled_value = abs(($submission-$ans)/$ans);
337: my $bin=0;
338: for ($bin=0;$bin<$#bins;$bin++) { # not <= for a reason
339: last if ($bins[$bin]>$scaled_value);
340: }
1.104 ! matthew 341: $correct[$bin]+=$correct_count;
! 342: $incorrect[$bin]+=$incorrect_count;
! 343: $count[$bin]+=$correct_count+$incorrect_count;
1.103 matthew 344: }
345: }
346: #
1.104 ! matthew 347: my @plot_correct;
! 348: my @plot_incorrect;
1.103 matthew 349: for (my $i=0;$i<=$#bins;$i++) {
1.104 ! matthew 350: $plot_correct[$i] = $correct[$i]*100/$total;
! 351: $plot_incorrect[$i] = $incorrect[$i]*100/$total;
1.103 matthew 352: }
353: my $title = &mt('Distribution by Percent');
354: my $graph = &Apache::loncommon::DrawBarGraph
355: ($title,'Percent difference from correct','Number of answers',
1.104 ! matthew 356: 100,['#33FF00','#FF3300'],\@labels,\@plot_correct,\@plot_incorrect,
1.103 matthew 357: {xskip=>1});
358: #
1.104 ! matthew 359: my $table = $graph.$/.
! 360: &numerical_bin_table(\@bins,\@labels,\@incorrect,\@correct,\@count).$/;
1.103 matthew 361: return $table;
362: }
363:
364: sub numerical_plot_differences {
365: my ($r,$responses) = @_;
366: #
367: my $total = $responses->{'_count'};
368: return '' if ($total == 0);
369: my $minbin = undef;
370: my $maxbin = undef;
371: while (my ($interval,$submissions) = each(%$responses)) {
372: next if ($interval =~ /^_/);
373: my ($ans,$ans_low,$ans_high) = split(" ",$interval);
374: my $low_diff = abs($ans-$ans_low);
375: my $high_diff = abs($ans_high-$ans);
376: if (! defined($maxbin)) { $maxbin = $low_diff;}
377: if (! defined($minbin)) { $minbin = $low_diff;}
378: #
379: if ($minbin > $high_diff) { $minbin = $high_diff; }
380: if ($minbin > $low_diff ) { $minbin = $low_diff; }
381: #
382: if ($maxbin < $high_diff) { $maxbin = $high_diff; }
383: if ($maxbin < $low_diff ) { $maxbin = $low_diff; }
384: }
385: #
386: my @bins;
387: my @labels;
388: # Hmmmm, should switch to absolute difference
389: for (my $i=1;$i<=20;$i++) {
390: push(@bins,$i*$minbin/2);
391: push(@labels,$i);
392: }
393: #
394: my @correct;
395: my @incorrect;
1.104 ! matthew 396: my @count;
1.103 matthew 397: while (my ($interval,$submissions) = each(%$responses)) {
398: next if ($interval =~ /^_/);
399: my ($ans,$ans_low,$ans_high) = split(" ",$interval);
1.104 ! matthew 400: while (my ($submission,$counts) = each(%$submissions)) {
! 401: my ($correct_count,$incorrect_count) = @$counts;
1.103 matthew 402: my $value = abs($submission-$ans);
403: my $bin=0;
404: for ($bin=0;$bin<$#bins;$bin++) { # not <= for a reason
405: last if ($bins[$bin]>$value);
406: }
1.104 ! matthew 407: $correct[$bin]+=$correct_count;
! 408: $incorrect[$bin]+=$incorrect_count;
! 409: $count[$bin]+=$correct_count+$incorrect_count;
1.103 matthew 410: }
411: }
412: #
1.104 ! matthew 413: my @plot_correct;
! 414: my @plot_incorrect;
1.103 matthew 415: for (my $i=0;$i<=$#bins;$i++) {
1.104 ! matthew 416: $plot_correct[$i] = $correct[$i]*100/$total;
! 417: $plot_incorrect[$i] = $incorrect[$i]*100/$total;
1.103 matthew 418: }
419: my $title = &mt('Distribution by Magnitude');
420: my $graph = &Apache::loncommon::DrawBarGraph
421: ($title,'magnitude difference from correct','Number of answers',
1.104 ! matthew 422: 100,['#33FF00','#FF3300'],\@labels,\@plot_correct,\@plot_incorrect,
! 423: {xskip=>1});
1.103 matthew 424: #
1.104 ! matthew 425: my $table = $graph.$/.
! 426: &numerical_bin_table(\@bins,\@labels,\@incorrect,\@correct,\@count).$/;
! 427: return $table;
! 428: }
! 429:
! 430: sub numerical_classify_responses {
! 431: my ($full_row_data,$correct,$function) = @_;
! 432: my %submission_data;
! 433: my %students;
! 434: my $max=0;
! 435: foreach my $row (@$full_row_data) {
! 436: my %subm = &hashify_attempt($row);
! 437: if (ref($correct) eq 'HASH') {
! 438: $subm{'correct'} = $correct->{$subm{'student'}};
! 439: } else {
! 440: $subm{'correct'} = $correct;
! 441: }
! 442: $subm{'submission'} =~ s/=\d+\s*$//;
! 443: if (&$function(\%subm)) {
! 444: my $submission = $subm{'submission'};
! 445: $students{$subm{'student'}}++;
! 446: if (&numerical_submission_is_correct($subm{'award'})) {
! 447: $submission_data{'_correct'}++;
! 448: $submission_data{'_count'}++;
! 449: $submission_data{$subm{'correct'}}->{$submission}->[0]++;
! 450: } elsif (&numerical_submission_is_incorrect($subm{'award'})) {
! 451: $submission_data{'_count'}++;
! 452: $submission_data{$subm{'correct'}}->{$submission}->[1]++;
! 453: }
! 454: my $value =
! 455: $submission_data{$subm{'correct'}}->{$submission}->[0]+
! 456: $submission_data{$subm{'correct'}}->{$submission}->[1];
! 457: if ($max < $value) { $max = $value; }
! 458: }
! 459: }
! 460: $submission_data{'_max'} = $max;
! 461: $submission_data{'_students'}=scalar(keys(%students));
! 462: return \%submission_data;
! 463: }
! 464:
! 465: sub numerical_submission_is_correct {
! 466: my ($award) = @_;
! 467: if ($award =~ /^(APPROX_ANS|EXACT_ANS)$/) {
! 468: return 1;
! 469: } else {
! 470: return 0;
! 471: }
! 472: }
! 473:
! 474: sub numerical_submission_is_incorrect {
! 475: my ($award) = @_;
! 476: if ($award =~ /^(INCORRECT)$/) {
! 477: return 1;
! 478: } else {
! 479: return 0;
! 480: }
! 481: }
! 482:
! 483: sub numerical_bin_table {
! 484: my ($bins,$labels,$incorrect,$correct,$count)=@_;
! 485: my $table =
! 486: '<table><tr><th>'.&mt('Bar').'</th>'.
! 487: '<th colspan="3">'.&mt('Range').'</th>'.
! 488: '<th>'.&mt('Incorrect').'</th>'.
! 489: '<th>'.&mt('Correct').'</th>'.
! 490: '<th>'.&mt('Count').'</th>'.
! 491: '</tr>'.$/;
! 492: for (my $i=0;$i<scalar(@{$bins});$i++) {
1.103 matthew 493: my $lownum;
494: if ($i == 0) {
495: $lownum = 0;
496: } else {
1.104 ! matthew 497: $lownum = $bins->[$i-1];
1.103 matthew 498: }
1.104 ! matthew 499: my $highnum = $bins->[$i];
1.103 matthew 500: $table .=
501: '<tr>'.
1.104 ! matthew 502: '<td>'.$labels->[$i].'</td>'.
1.103 matthew 503: '<td align="right">'.$lownum.'</td>'.
504: '<td> - </td>'.
1.104 ! matthew 505: '<td align="right">'.$highnum.'</td>'.
! 506: '<td align="right">'.$incorrect->[$i].'</td>'.
! 507: '<td align="right">'.$correct->[$i].'</td>'.
! 508: '<td align="right">'.$count->[$i].'</td>'.
! 509: '</tr>'.$/;
1.103 matthew 510: }
1.104 ! matthew 511: $table.= '</table>';
1.103 matthew 512: return $table;
1.66 matthew 513: }
514:
1.103 matthew 515: sub numerical_response_determine_intervals {
516: my ($r,$resource,$partid,$respid,$students)=@_;
517: my $c = $r->connection();
1.78 matthew 518: #
1.104 ! matthew 519: # FIX ME: May need progress dialog updates
1.103 matthew 520: #
521: # Read in the cache (if it exists) before we start timing things.
522: &Apache::lonstathelpers::ensure_proper_cache($resource->{'symb'});
523: #
524: my $correct;
525: # %intervals differs from %answers because it may be possible for two
526: # students to have the same correct answer but different intervals.
527: my %intervals;
528: my %answers;
529: foreach my $student (@$students) {
530: last if ($c->aborted());
531: my $sname = $student->{'username'};
532: my $sdom = $student->{'domain'};
533: # analyze problem
534: my $analysis =
535: &Apache::lonstathelpers::analyze_problem_as_student($resource,
536: $sname,
537: $sdom);
538: # make the key
539: my $key = $partid.'.'.$respid;
540: my $interval = join(' ',($analysis->{$key.'.answer'}->[0],
541: $analysis->{$key.'.ans_low'}->[0],
542: $analysis->{$key.'.ans_high'}->[0]));
543: $correct->{$sname.':'.$sdom} = $interval;
544: $intervals{$interval}++;
545: $answers{$analysis->{$key.'.answer'}->[0]}++;
1.82 matthew 546: }
1.103 matthew 547: &Apache::lonstathelpers::write_analysis_cache();
548: return ($correct,\%intervals,\%answers);
549: }
550:
1.104 ! matthew 551: #
! 552: # Inputs: $r, $width, $height, $data
! 553: # $n = number of students
! 554: # $data = hashref of $answer => $frequency pairs
1.103 matthew 555: sub numerical_one_dimensional_plot {
1.104 ! matthew 556: my ($r,$width,$height,$data)=@_;
1.78 matthew 557: #
1.103 matthew 558: # Compute data -> image scaling factors
1.78 matthew 559: my $max_y = 0;
1.103 matthew 560: my $min_x = undef;
561: my $max_x = undef;
1.104 ! matthew 562: my $n = 0;
1.103 matthew 563: while (my ($answer,$count) = each(%$data)) {
1.104 ! matthew 564: $n+=$count;
1.103 matthew 565: $max_y = $count if ($max_y < $count);
566: if (! defined($min_x) || $answer < $min_x) {
567: $min_x = $answer;
568: }
569: if (! defined($max_x) || $answer > $max_x) {
570: $max_x = $answer;
571: }
1.78 matthew 572: }
1.103 matthew 573: #
574: my $h_scale = ($width-10)/($max_x-$min_x);
575: #
1.78 matthew 576: my $ticscale = 5;
577: if ($max_y * $ticscale > $height/2) {
578: $ticscale = int($height/2/$max_y);
579: $ticscale = 1 if ($ticscale < 1);
580: }
581: #
582: # Create the plot
583: my $plot =
584: qq{<drawimage width="$width" height="$height" bgcolor="transparent" >};
1.103 matthew 585: while (my ($answer,$count) = each(%$data)) {
586: my $xloc = 5+$h_scale*($answer - $min_x);
587: my $top = $height/2-$count*$ticscale;
588: my $bottom = $height/2+$count*$ticscale;
589: $plot .= &line($xloc,$top,$xloc,$bottom,'888888',1);
1.78 matthew 590: }
591: #
592: # Put the scale on last to ensure it is on top of the data.
1.103 matthew 593: if ($min_x < 0 && $max_x > 0) {
594: my $circle_x = 5+$h_scale*abs($min_x); # '0' in data coordinates
1.78 matthew 595: my $r = 4;
596: $plot .= &line(5,$height/2,$circle_x-$r,$height/2,'000000',1);
597: $plot .= &circle($circle_x,$height/2,$r+1,'000000');
598: $plot .= &line($circle_x+$r,$height/2,$width-5,$height/2,'000000',1);
599: } else {
600: $plot .= &line(5,$height/2,$width-5,$height/2,'000000',1);
601: }
602: $plot .= '</drawimage>';
603: my $plotresult = &Apache::lonxml::xmlparse($r,'web',$plot);
604:
605: my $result = '<table>'.
606: '<tr><td colspan="3" align="center">'.
1.103 matthew 607: '<font size="+2">'.&mt('Distribution of correct answers').'</font>'.
608: '<br />'.&mt('[_1] students, [_2] distinct correct answers',
609: $n,scalar(keys(%$data))).
610: '<br />'.&mt('Maximum number of coinciding values: [_1]',$max_y).
1.78 matthew 611: '</td></tr>'.
612: '<tr>'.
1.103 matthew 613: '<td valign="center">'.$min_x.'</td>'.
1.78 matthew 614: '<td>'.$plotresult.'</td>'.
1.103 matthew 615: '<td valign="center">'.$max_x.'</td>'.
1.78 matthew 616: '</tr>'.
617: '</table>';
618: return $result;
619: }
620:
621: ##
622: ## Helper subroutines for <drawimage>.
623: ## These should probably go somewhere more suitable soon.
624: sub line {
625: my ($x1,$y1,$x2,$y2,$color,$thickness) = @_;
1.103 matthew 626: return qq{<line x1="$x1" y1="$y1" x2="$x2" y2="$y2" color="$color" thickness="$thickness" />};
1.78 matthew 627: }
628:
1.82 matthew 629: sub text {
630: my ($x,$y,$color,$text,$font,$direction) = @_;
631: if (! defined($font) || $font !~ /^(tiny|small|medium|large|giant)$/) {
632: $font = 'medium';
633: }
634: if (! defined($direction) || $direction ne 'vertical') {
635: $direction = '';
636: }
637: return qq{<text x="$x" y="$y" color="$color" font="$font" direction="$direction" >$text</text>};
638: }
639:
1.78 matthew 640: sub rectangle {
641: my ($x1,$y1,$x2,$y2,$color,$thickness,$filled) = @_;
642: return qq{<rectangle x1="$x1" y1="$y1" x2="$x2" y2="$y2" color="$color" thickness="$thickness" filled="$filled" />};
643: }
644:
645: sub arc {
646: my ($x,$y,$width,$height,$start,$end,$color,$thickness,$filled)=@_;
647: return qq{<arc x="$x" y="$y" width="$width" height="$height" start="$start" end="$end" color="$color" thickness="$thickness" filled="$filled" />};
648: }
649:
650: sub circle {
651: my ($x,$y,$radius,$color,$thickness,$filled)=@_;
652: return &arc($x,$y,$radius,$radius,0,360,$color,$thickness,$filled);
1.68 matthew 653: }
654:
655: sub build_student_data_worksheet {
656: my ($workbook,$format) = @_;
657: my $rows_output = 3;
658: my $cols_output = 0;
659: my $worksheet = $workbook->addworksheet('Student Data');
660: $worksheet->write($rows_output++,0,'Student Data',$format->{'h3'});
661: my @Headers = ('full name','username','domain','section',
662: "student\nnumber",'identifier');
663: $worksheet->write_row($rows_output++,0,\@Headers,$format->{'header'});
664: my @Students = @Apache::lonstatistics::Students;
665: my $studentrows = &Apache::loncoursedata::get_student_data(\@Students);
666: my %ids;
667: foreach my $row (@$studentrows) {
668: my ($mysqlid,$student) = @$row;
669: $ids{$student}=$mysqlid;
670: }
671: foreach my $student (@Students) {
672: my $name_domain = $student->{'username'}.':'.$student->{'domain'};
673: $worksheet->write_row($rows_output++,0,
674: [$student->{'fullname'},
675: $student->{'username'},$student->{'domain'},
676: $student->{'section'},$student->{'id'},
677: $ids{$name_domain}]);
678: }
679: return $worksheet;
1.66 matthew 680: }
1.47 matthew 681:
682: #########################################################
683: #########################################################
684: ##
685: ## Radio Response Routines
686: ##
687: #########################################################
688: #########################################################
1.97 matthew 689: sub radio_response_analysis {
1.94 matthew 690: my ($r,$problem,$problem_analysis,$students) = @_;
1.97 matthew 691: #
692: if ($ENV{'form.AnalyzeOver'} !~ /^(tries|time)$/) {
1.94 matthew 693: $r->print('Bad request');
694: }
1.97 matthew 695: #
1.94 matthew 696: my ($resource,$partid,$respid) = ($problem->{'resource'},
697: $problem->{'part'},
698: $problem->{'respid'});
699: #
700: my $analysis_html;
701: my $foildata = $problem_analysis->{'_Foils'};
702: my ($table,$foils,$concepts) = &build_foil_index($problem_analysis);
1.97 matthew 703: #
1.98 matthew 704: my %true_foils;
1.97 matthew 705: my $num_true = 0;
1.98 matthew 706: if (! $problem_analysis->{'answercomputed'}) {
707: foreach my $foil (@$foils) {
708: if ($foildata->{$foil}->{'value'} eq 'true') {
709: $true_foils{$foil}++;
710: }
1.97 matthew 711: }
1.98 matthew 712: $num_true = scalar(keys(%true_foils));
1.97 matthew 713: }
714: #
1.94 matthew 715: $analysis_html .= $table;
716: # Gather student data
717: my $response_data = &Apache::loncoursedata::get_response_data
718: (\@Apache::lonstatistics::SelectedSections,
719: $Apache::lonstatistics::enrollment_status,
720: $resource->{'symb'},$respid);
721: my $correct; # either a hash reference or a scalar
722: if ($problem_analysis->{'answercomputed'} || scalar(@$concepts) > 1) {
723: # This takes a while for large classes...
724: &Apache::lonstathelpers::GetStudentAnswers($r,$problem,$students,
725: 'Statistics',
726: 'stats_status');
727: foreach my $student (@$students) {
728: my ($idx,@remainder) = split('&',$student->{'answer'});
729: my ($answer) = ($remainder[$idx]=~/^(.*)=([^=]*)$/);
730: $correct->{$student->{'username'}.':'.$student->{'domain'}}=
731: &Apache::lonnet::unescape($answer);
732: }
733: } else {
734: foreach my $foil (keys(%$foildata)) {
735: if ($foildata->{$foil}->{'value'} eq 'true') {
736: $correct = $foildata->{$foil}->{'name'};
737: }
738: }
739: }
1.97 matthew 740: #
741: if (! defined($response_data) || ref($response_data) ne 'ARRAY' ) {
1.94 matthew 742: $analysis_html = '<h2>'.
743: &mt('There is no submission data for this resource').
744: '</h2>';
745: $r->print($analysis_html);
746: return;
747: }
748: #
749: $analysis_html.='<table>';
1.97 matthew 750: for (my $plot_num = 1;$plot_num<=$ENV{'form.NumPlots'};$plot_num++) {
1.94 matthew 751: # classify data ->correct foil -> selected foil
1.97 matthew 752: my ($restriction_function,
753: $correct_foil_title,$incorrect_foil_title,
754: $pre_graph_text,$post_graph_text,
755: $no_data_text,@extra_data);
756: if ($ENV{'form.AnalyzeOver'} eq 'tries') {
757: $restriction_function = sub {($_[0]->{'tries'} == $plot_num?1:0)};
758: $correct_foil_title = 'Attempt '.$plot_num;
759: $incorrect_foil_title = 'Attempt '.$plot_num;
760: $pre_graph_text =
761: 'Attempt [_1], [_2] submissions, [_3] correct, [_4] incorrect';
762: $post_graph_text = '';
763: $no_data_text = 'No data exists for attempt [_1]';
764: } elsif ($ENV{'form.AnalyzeOver'} eq 'time') {
765: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
766: ('startdate_'.$plot_num);
767: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
768: ('enddate_'.$plot_num);
769: ($starttime,$endtime) = &ensure_start_end_times
770: ($starttime,$endtime,
771: &get_time_from_row($response_data->[0]),
772: &get_time_from_row($response_data->[-1]),
773: $plot_num);
774: $pre_graph_text =
1.102 matthew 775: 'Data from [_6] to [_7]<br /> [_2] submissions from [_5] students, [_3] correct, [_4] incorrect';
1.97 matthew 776: $extra_data[0] = &Apache::lonlocal::locallocaltime($starttime);
777: $extra_data[1] = &Apache::lonlocal::locallocaltime($endtime);
778: #
779: $post_graph_text =
780: &mt('Start time: [_1]',
781: &Apache::lonhtmlcommon::date_setter
782: ('Statistics','startdate_'.$plot_num,$starttime)).
783: '<br />'.
784: &mt('End time: [_1]',
785: &Apache::lonhtmlcommon::date_setter
786: ('Statistics','enddate_'.$plot_num,$endtime));
787: $restriction_function =
788: sub {
789: my $t = $_[0]->{'timestamp'};
790: if ($t >= $starttime && $t < $endtime) {
791: return 1;
792: } else {
793: return 0;
794: }
795: };
796: $no_data_text = 'No data for [_5] to [_6]';
797: }
798: my $foil_choice_data =
1.103 matthew 799: &classify_response_data($response_data,$correct,
800: $restriction_function);
1.97 matthew 801: # &Apache::lonstathelpers::log_hash_ref($foil_choice_data);
1.94 matthew 802: my $answers;
803: if (ref($correct)) {
804: my %tmp;
805: foreach my $foil (values(%$correct)) {
806: $tmp{$foil}++;
807: }
808: $answers = [keys(%tmp)];
809: } else {
810: $answers = [$correct];
811: }
812: # Concept Plot
813: my $concept_plot = '';
814: if (scalar(@$concepts) > 1) {
815: $concept_plot = &RR_concept_plot($concepts,$foil_choice_data,
1.97 matthew 816: 'Correct Concepts');
1.94 matthew 817: }
818: # % Choosing plot
819: my $choice_plot = &RR_create_percent_selected_plot
1.97 matthew 820: ($concepts,$foils,$foil_choice_data,$correct_foil_title);
1.94 matthew 821: # for each correct foil, how did they mark it? (stacked bar graph)
1.97 matthew 822: my ($stacked_plot,$count_by_foil);
823: if ($problem_analysis->{'answercomputed'} || $num_true > 1) {
824: ($stacked_plot,$count_by_foil) =
825: &RR_create_stacked_selection_plot($foils,$foil_choice_data,
1.98 matthew 826: $incorrect_foil_title,
827: \%true_foils);
1.97 matthew 828: }
1.94 matthew 829: #
830: if ($concept_plot ne '' ||
1.97 matthew 831: $choice_plot ne '' ||
1.94 matthew 832: $stacked_plot ne '') {
1.97 matthew 833: my $correct = $foil_choice_data->{'_correct'};
834: if (! defined($correct) || $correct eq '') {
835: $correct = 0;
836: }
837: my $incorrect =
838: $analysis_html.= '<tr><td colspan="4" align="center">'.
839: '<font size="+1">'.
840: &mt($pre_graph_text,
841: $plot_num,$foil_choice_data->{'_count'},
1.102 matthew 842: $correct,
1.97 matthew 843: $foil_choice_data->{'_count'}-$correct,
1.102 matthew 844: $foil_choice_data->{'_students'},
1.97 matthew 845: @extra_data).
846: '</td></tr>'.$/;
1.94 matthew 847: $analysis_html.=
848: '<tr>'.
849: '<td>'.$concept_plot.'</td>'.
850: '<td>'.$choice_plot.'</td>';
851: if ($stacked_plot ne '') {
852: $analysis_html .=
1.97 matthew 853: '<td>'.$stacked_plot.'</td>'.
854: '<td>'.&build_foil_key($foils,$count_by_foil).'</td>';
1.94 matthew 855: } else {
856: $analysis_html .= ('<td></td>'x2);
857: }
858: $analysis_html.='</tr>'.$/;
1.97 matthew 859: if (defined($post_graph_text)) {
860: $analysis_html.= '<tr><td colspan="4" align="center">'.
861: $post_graph_text.'</td></tr>'.$/;
862: }
863: } elsif ($no_data_text ne '') {
864: $analysis_html.='<tr><td colspan="4" align="center">'.
865: &mt($no_data_text,
866: $plot_num,$foil_choice_data->{'_count'},
867: $correct,
868: $foil_choice_data->{'_count'}-$correct,
869: @extra_data);
870: if (defined($post_graph_text)) {
871: $analysis_html.='<br />'.$post_graph_text;
872: }
873: $analysis_html.='</td></tr>'.$/;
1.94 matthew 874: }
1.97 matthew 875: } # end of loop for plots
1.94 matthew 876: $analysis_html.='</table>';
877: $r->print($analysis_html);
878: }
879:
1.97 matthew 880: sub ensure_start_end_times {
881: my ($start,$end,$first,$last,$plot_num) = @_;
882: if (! defined($start) || ! defined($end)) {
883: my $sec_in_day = 86400;
884: my ($sday,$smon,$syear) =
885: (localtime($last - $sec_in_day*($plot_num-1)))[3..5];
886: $start = &Time::Local::timelocal(0,0,0,$sday,$smon,$syear);
887: $end = $start + $sec_in_day;
888: if ($plot_num == $ENV{'form.NumPlots'}) {
889: $start = $first;
890: }
891: }
892: return ($start,$end);
893: }
1.94 matthew 894:
895: sub RR_concept_plot {
896: my ($concepts,$foil_data,$title) = @_;
897: #
898: my %correct_by_concept;
899: my %incorrect_by_concept;
900: my %true;
901: foreach my $concept (@$concepts) {
902: foreach my $foil (@{$concept->{'foils'}}) {
903: next if (! exists($foil_data->{$foil}));
904: foreach my $choice (keys(%{$foil_data->{$foil}})) {
905: if ($choice eq $foil) {
906: $correct_by_concept{$concept->{'name'}} +=
907: $foil_data->{$foil}->{$choice};
908: } else {
909: $incorrect_by_concept{$concept->{'name'}} +=
910: $foil_data->{$foil}->{$choice};
911:
912: }
913: }
914: }
915: }
916: #
917: # need arrays for incorrect and correct because we want to use different
918: # colors for them
919: my @correct;
920: #
921: my $total =0;
922: for (my $i=0;$i<scalar(@$concepts);$i++) {
923: my $concept = $concepts->[$i];
924: $correct[$i] = $correct_by_concept{$concept->{'name'}};
925: $total += $correct_by_concept{$concept->{'name'}}+
926: $incorrect_by_concept{$concept->{'name'}};
927: }
928: if ($total == 0) { return ''; };
929: for (my $i=0;$i<=$#correct;$i++) {
930: $correct[$i] = sprintf('%0f',$correct[$i]/$total*100);
931: }
932: my $xlabel = 'concept';
933: my $plot= &Apache::loncommon::DrawBarGraph($title,
934: $xlabel,
935: 'Percent Choosing',
936: 100,
937: ['#33ff00','#ff3300'],
938: undef,
939: \@correct);
940: return $plot;
941: }
942:
943: sub RR_create_percent_selected_plot {
1.97 matthew 944: my ($concepts,$foils,$foil_data,$title) = @_;
1.94 matthew 945: #
1.99 matthew 946: if ($foil_data->{'_count'} == 0) { return ''; };
947: my %correct_selections;
948: my %incorrect_selections;
1.94 matthew 949: foreach my $foil (@$foils) {
1.101 matthew 950: # foil_data has format $foil_data->{true_foil}->{selected foil}=count
1.94 matthew 951: next if (! exists($foil_data->{$foil}));
952: while (my ($f,$count)= each(%{$foil_data->{$foil}})) {
1.99 matthew 953: if ($f eq $foil) {
954: $correct_selections{$foil} += $count;
955: } else {
1.101 matthew 956: $incorrect_selections{$f} += $count;
1.99 matthew 957: }
1.94 matthew 958: }
959: }
960: #
961: # need arrays for incorrect and correct because we want to use different
962: # colors for them
963: my @correct;
964: my @incorrect;
965: #
1.99 matthew 966: my $total = $foil_data->{'_count'};
1.94 matthew 967: for (my $i=0;$i<scalar(@$foils);$i++) {
968: my $foil = $foils->[$i];
1.99 matthew 969: $correct[$i] = $correct_selections{$foil};
970: $incorrect[$i] = $incorrect_selections{$foil};
1.94 matthew 971: }
972: for (my $i=0;$i<=$#correct;$i++) {
1.99 matthew 973: $correct[$i] = sprintf('%2f',$correct[$i]/$total*100);
1.94 matthew 974: }
975: for (my $i=0;$i<=$#incorrect;$i++) {
1.99 matthew 976: $incorrect[$i] = sprintf('%2f',$incorrect[$i]/$total*100);
1.94 matthew 977: }
1.97 matthew 978: #
979: # Put a blank in the data sets between concepts, if there are concepts
980: my @labels;
981: if (defined($concepts) && scalar(@$concepts) > 1) {
982: my @new_correct;
983: my @new_incorrect;
984: my $foil_count = 0;
985: foreach my $concept (@$concepts) {
986: foreach (@{$concept->{'foils'}}) {
987: push(@new_correct, $correct[$foil_count]);
988: push(@new_incorrect,$incorrect[$foil_count]);
989: push(@labels,++$foil_count);
990: }
991: push(@new_correct,'');
992: push(@new_incorrect,'');
993: push(@labels,'');
994: }
995: @correct = @new_correct;
996: @incorrect = @new_incorrect;
997: } else {
998: @labels = (1 .. scalar(@correct));
999: }
1000: #
1.94 matthew 1001: my $xlabel = 'foil chosen';
1002: my $plot= &Apache::loncommon::DrawBarGraph($title,
1003: $xlabel,
1004: 'Percent Choosing',
1005: 100,
1006: ['#33ff00','#ff3300'],
1.97 matthew 1007: \@labels,
1.94 matthew 1008: \@correct,
1009: \@incorrect);
1010: return $plot;
1011: }
1012:
1013: sub RR_create_stacked_selection_plot {
1.98 matthew 1014: my ($foils,$foil_data,$title,$true_foils)=@_;
1.94 matthew 1015: #
1.97 matthew 1016: my @dataset; # array of array refs - multicolor rows $datasets[row]->[col]
1.94 matthew 1017: my @labels;
1.97 matthew 1018: my $count;
1019: my %column; # maps foil name to column in @datasets
1.94 matthew 1020: for (my $i=0;$i<scalar(@$foils);$i++) {
1.98 matthew 1021: my $foil = $foils->[$i];
1022: if (defined($true_foils) && scalar(keys(%$true_foils)) > 0 ) {
1023: next if (! $true_foils->{$foil} );
1024: push(@labels,$i+1);
1025: } else {
1026: next if (! exists($foil_data->{$foil}));
1027: push(@labels,$i+1);
1028: }
1.94 matthew 1029: next if (! exists($foil_data->{$foils->[$i]}));
1.98 matthew 1030: $column{$foil}= $count++;
1.94 matthew 1031: for (my $j=0;$j<scalar(@$foils);$j++) {
1032: my $value = 0;
1033: if ($i != $j ) {
1.98 matthew 1034: $value += $foil_data->{$foil}->{$foils->[$j]};
1.94 matthew 1035: }
1.98 matthew 1036: $dataset[$j]->[$column{$foil}]=$value;
1.94 matthew 1037: }
1038: }
1039: #
1040: return '' if (! scalar(keys(%column)));
1041: #
1042: my $grand_total = 0;
1043: my %count_per_foil;
1044: while (my ($foil,$bar) = each (%column)) {
1045: my $bar_total = 0;
1046: for (my $j=0;$j<scalar(@dataset);$j++) {
1047: $bar_total += $dataset[$j]->[$bar];
1048: }
1049: next if ($bar_total == 0);
1050: for (my $j=0;$j<scalar(@dataset);$j++) {
1051: $dataset[$j]->[$bar] =
1052: sprintf('%2f',$dataset[$j]->[$bar]/$bar_total * 100);
1053: }
1.97 matthew 1054: $count_per_foil{$foil}=' ( '.$bar_total.' )';
1.94 matthew 1055: $grand_total += $bar_total;
1056: }
1057: if ($grand_total == 0) {
1058: return ('',undef);
1059: }
1060: my @empty_row = ();
1061: foreach (@{$dataset[0]}) {
1062: push(@empty_row,0);
1063: }
1064: #
1065: my $graph = &Apache::loncommon::DrawBarGraph
1066: ($title,'Correct Foil','foils chosen Incorrectly',
1067: 100,$plotcolors,\@labels,\@empty_row,@dataset);
1068: return ($graph,\%count_per_foil);
1069: }
1070:
1.103 matthew 1071:
1072: #########################################################
1073: #########################################################
1074: ##
1075: ## Misc routines
1076: ##
1077: #########################################################
1078: #########################################################
1079:
1.94 matthew 1080: # if $correct is a hash ref, it is assumed to be indexed by student names.
1081: # the values are assumed to be hash refs with a key of 'answer'.
1.103 matthew 1082: sub classify_response_data {
1.94 matthew 1083: my ($full_row_data,$correct,$function) = @_;
1084: my %submission_data;
1.102 matthew 1085: my %students;
1.103 matthew 1086: my $max=0;
1.94 matthew 1087: foreach my $row (@$full_row_data) {
1088: my %subm = &hashify_attempt($row);
1089: if (ref($correct) eq 'HASH') {
1090: $subm{'correct'} = $correct->{$subm{'student'}};
1091: } else {
1092: $subm{'correct'} = $correct;
1093: }
1094: $subm{'submission'} =~ s/=\d+\s*$//;
1095: if (&$function(\%subm)) {
1.102 matthew 1096: $students{$subm{'student'}}++;
1.97 matthew 1097: $submission_data{'_count'}++;
1098: if (&submission_is_correct($subm{'award'})) {
1099: $submission_data{'_correct'}++;
1100: }
1.103 matthew 1101:
1102: if($max<++$submission_data{$subm{'correct'}}->{$subm{'submission'}}) {
1103: $max=$submission_data{$subm{'correct'}}->{$subm{'submission'}};
1104: }
1.94 matthew 1105: }
1106: }
1.103 matthew 1107: $submission_data{'_max'} = $max;
1.102 matthew 1108: $submission_data{'_students'}=scalar(keys(%students));
1.94 matthew 1109: return \%submission_data;
1110: }
1111:
1112:
1.33 matthew 1113: #########################################################
1114: #########################################################
1115: ##
1.46 matthew 1116: ## Option Response Routines
1.33 matthew 1117: ##
1118: #########################################################
1119: #########################################################
1.46 matthew 1120: sub OptionResponseAnalysis {
1.88 matthew 1121: my ($r,$problem,$problem_data,$Students) = @_;
1.56 matthew 1122: my ($resource,$respid) = ($problem->{'resource'},
1123: $problem->{'respid'});
1124: # Note: part data is not needed.
1.82 matthew 1125: my $PerformanceData = &Apache::loncoursedata::get_response_data
1126: (\@Apache::lonstatistics::SelectedSections,
1127: $Apache::lonstatistics::enrollment_status,
1128: $resource->{'symb'},$respid);
1.46 matthew 1129: if (! defined($PerformanceData) ||
1130: ref($PerformanceData) ne 'ARRAY' ) {
1131: $r->print('<h2>'.
1132: &mt('There is no student data for this problem.').
1133: '</h2>');
1134: } else {
1135: $r->rflush();
1136: if (exists($ENV{'form.ExcelOutput'})) {
1.57 matthew 1137: my $result = &OR_excel_sheet($r,$resource,
1138: $PerformanceData,
1.88 matthew 1139: $problem_data);
1.46 matthew 1140: $r->print($result);
1141: $r->rflush();
1.39 matthew 1142: } else {
1.94 matthew 1143: if ($ENV{'form.AnalyzeOver'} eq 'tries') {
1.57 matthew 1144: my $analysis_html = &OR_tries_analysis($r,
1.46 matthew 1145: $PerformanceData,
1.88 matthew 1146: $problem_data);
1.46 matthew 1147: $r->print($analysis_html);
1148: $r->rflush();
1.94 matthew 1149: } elsif ($ENV{'form.AnalyzeOver'} eq 'time') {
1.57 matthew 1150: my $analysis_html = &OR_time_analysis($PerformanceData,
1.88 matthew 1151: $problem_data);
1.46 matthew 1152: $r->print($analysis_html);
1153: $r->rflush();
1.39 matthew 1154: } else {
1.46 matthew 1155: $r->print('<h2>'.
1156: &mt('The analysis you have selected is '.
1157: 'not supported at this time').
1158: '</h2>');
1159: }
1.36 matthew 1160: }
1.39 matthew 1161: }
1162: }
1163:
1.33 matthew 1164: #########################################################
1.46 matthew 1165: #
1.94 matthew 1166: # Option Response: tries Analysis
1.46 matthew 1167: #
1.33 matthew 1168: #########################################################
1.57 matthew 1169: sub OR_tries_analysis {
1.43 matthew 1170: my ($r,$PerformanceData,$ORdata) = @_;
1.33 matthew 1171: my $mintries = 1;
1172: my $maxtries = $ENV{'form.NumPlots'};
1.39 matthew 1173: my ($table,$Foils,$Concepts) = &build_foil_index($ORdata);
1.88 matthew 1174: my %response_data = &OR_analyze_by_tries($r,$PerformanceData,
1.36 matthew 1175: $mintries,$maxtries);
1.42 matthew 1176: my $analysis = '';
1.31 matthew 1177: #
1.88 matthew 1178: # Compute the data necessary to make the plots
1179: my @foil_plot;
1180: my @concept_data;
1181: for (my $j=0;$j<=scalar(@$Concepts);$j++) {
1182: my $concept = $Concepts->[$j];
1.75 matthew 1183: foreach my $foilid (@{$concept->{'foils'}}) {
1.76 matthew 1184: for (my $try=$mintries;$try<=$maxtries;$try++) {
1.88 matthew 1185: # concept analysis data
1.93 matthew 1186: $concept_data[$j]->[$try]->{'_correct'} +=
1.88 matthew 1187: $response_data{$foilid}->[$try]->{'_correct'};
1.93 matthew 1188: $concept_data[$j]->[$try]->{'_total'} +=
1.88 matthew 1189: $response_data{$foilid}->[$try]->{'_total'};
1190: #
1191: # foil analysis data
1192: if ($response_data{$foilid}->[$try]->{'_total'} == 0) {
1193: push(@{$foil_plot[$try]->{'_correct'}},0);
1.42 matthew 1194: } else {
1.88 matthew 1195: push(@{$foil_plot[$try]->{'_correct'}},
1196: 100*$response_data{$foilid}->[$try]->{'_correct'}/
1197: $response_data{$foilid}->[$try]->{'_total'});
1.75 matthew 1198: }
1199: foreach my $option (@{$ORdata->{'_Options'}}) {
1.88 matthew 1200: push(@{$foil_plot[$try]->{'_total'}},
1201: $response_data{$foilid}->[$try]->{'_total'});
1202: if ($response_data{$foilid}->[$try]->{'_total'} == 0) {
1203: push (@{$foil_plot[$try]->{$option}},0);
1.39 matthew 1204: } else {
1.88 matthew 1205: if ($response_data{$foilid}->[$try]->{'_total'} ==
1206: $response_data{$foilid}->[$try]->{'_correct'}) {
1207: push(@{$foil_plot[$try]->{$option}},0);
1.75 matthew 1208: } else {
1.88 matthew 1209: push (@{$foil_plot[$try]->{$option}},
1.76 matthew 1210: 100 *
1.88 matthew 1211: $response_data{$foilid}->[$try]->{$option} /
1212: ($response_data{$foilid}->[$try]->{'_total'}
1.76 matthew 1213: -
1.88 matthew 1214: $response_data{$foilid}->[$try]->{'_correct'}
1.76 matthew 1215: ));
1.75 matthew 1216: }
1.39 matthew 1217: }
1.76 matthew 1218: } # End of foreach my $option
1.36 matthew 1219: }
1.76 matthew 1220: } # End of foreach my $foilid
1.88 matthew 1221: } # End of concept loops
1.42 matthew 1222: #
1223: # Build a table for the plots
1.96 matthew 1224: my $analysis_html = "<br /><table>\n";
1.75 matthew 1225: my $optionkey = &build_option_index($ORdata);
1.88 matthew 1226: my $num_concepts = 1;
1227: if (defined($Concepts)) { $num_concepts = scalar(@$Concepts); }
1228: #
1.75 matthew 1229: for (my $try=$mintries;$try<=$maxtries;$try++) {
1.92 matthew 1230: if (! defined($response_data{'_total'}->[$try]) ||
1231: $response_data{'_total'}->[$try] == 0) {
1232: if ($try > 1) {
1233: $analysis_html.= '<tr><td align="center" colspan="4"><b>'.
1234: &mt('None of the selected students attempted the problem more than [_1] times.',$try-1).
1235: '</b></td></tr>';
1236: } else {
1237: $analysis_html.= '<tr><td colspan="4" align="center"><b>'.
1238: &mt('None of the selected students have attempted the problem').'</b></td></tr>';
1239: }
1240: last;
1241: }
1.88 matthew 1242: my $concept_graph='';
1243: if ($num_concepts > 1) {
1244: #
1245: # Create concept plot
1246: my @concept_plot_data;
1247: for (my $j=0;$j<=$#concept_data;$j++) {
1.93 matthew 1248: my $total = $concept_data[$j]->[$try]->{'_total'};
1.88 matthew 1249: if ($total == 0) {
1250: $concept_plot_data[$j] = 0;
1251: } else {
1252: $concept_plot_data[$j] = 100 *
1253: sprintf('%0.3f',
1.93 matthew 1254: $concept_data[$j]->[$try]->{'_correct'} /
1255: $total);
1.88 matthew 1256: }
1257: }
1258: #
1259: $concept_graph = &Apache::loncommon::DrawBarGraph
1.96 matthew 1260: ('Correct Concepts','Concept Number','Percent Correct',
1.88 matthew 1261: 100,$plotcolors,undef,\@concept_plot_data);
1262: }
1263: #
1264: # Create Foil Plots
1.96 matthew 1265: my $data_count = $response_data{'_total'}->[$try];
1266: my $correct = $response_data{'_correct'}->[$try];
1.42 matthew 1267: my @Datasets;
1.48 matthew 1268: foreach my $option ('_correct',@{$ORdata->{'_Options'}}) {
1.88 matthew 1269: next if (! exists($foil_plot[$try]->{$option}));
1270: push(@Datasets,$foil_plot[$try]->{$option});
1.42 matthew 1271: }
1.76 matthew 1272: #
1273: # Put a blank in the data set between concepts
1274: for (my $set =0;$set<=$#Datasets;$set++) {
1275: my @Data = @{$Datasets[$set]};
1276: my $idx = 0;
1277: foreach my $concept (@{$Concepts}) {
1278: foreach my $foilid (@{$concept->{'foils'}}) {
1279: $Datasets[$set]->[$idx++]=shift(@Data);
1280: }
1281: if ($concept->{'name'} ne $Concepts->[-1]->{'name'}) {
1282: $Datasets[$set]->[$idx++] = 0;
1283: }
1284: }
1285: }
1286: #
1287: # Set up the labels needed for the bar graph
1288: my @Labels;
1289: my $idx = 1;
1290: foreach my $concept (@{$Concepts}) {
1291: foreach my $foilid (@{$concept->{'foils'}}) {
1292: push(@Labels,$idx++);
1293: }
1294: push(@Labels,'');
1295: }
1296: #
1.88 matthew 1297: my $correct_graph = &Apache::loncommon::DrawBarGraph
1.96 matthew 1298: ('Correct Statements','Statement','% Answered Correct',
1.76 matthew 1299: 100,$plotcolors,\@Labels,$Datasets[0]);
1.75 matthew 1300:
1301: #
1302: #
1.57 matthew 1303: next if (! defined($Datasets[0]));
1.42 matthew 1304: for (my $i=0; $i< scalar(@{$Datasets[0]});$i++) {
1305: $Datasets[0]->[$i]=0;
1306: }
1.96 matthew 1307: my $count = $response_data{'_total'}->[$try] -
1.88 matthew 1308: $response_data{'_correct'}->[$try];
1309: my $incorrect_graph = &Apache::loncommon::DrawBarGraph
1.96 matthew 1310: ('Incorrect Statements','Statement','% Chosen Incorrectly',
1.76 matthew 1311: 100,$plotcolors,\@Labels,@Datasets);
1.88 matthew 1312: $analysis_html.=
1.96 matthew 1313: '<tr><td colspan="4" align="center">'.
1314: '<font size="+1">'.
1315: &mt('Attempt [_1], [_2] submissions, [_3] correct, [_4] incorrect',
1316: $try,$data_count,$correct,$data_count-$correct).
1317: '</font>'.'</td></tr>'.$/.
1.88 matthew 1318: '<tr>'.
1319: '<td>'.$concept_graph.'</td>'.
1320: '<td>'.$correct_graph.'</td>'.
1321: '<td>'.$incorrect_graph.'</td>'.
1322: '<td>'.$optionkey.'<td>'.
1323: '</tr>'.$/;
1.42 matthew 1324: }
1325: $analysis_html .= "</table>\n";
1.88 matthew 1326: $table .= $analysis_html;
1327: return $table;
1.25 matthew 1328: }
1329:
1.57 matthew 1330: sub OR_analyze_by_tries {
1.43 matthew 1331: my ($r,$PerformanceData,$mintries,$maxtries) = @_;
1.25 matthew 1332: my %Trydata;
1333: $mintries = 1 if (! defined($mintries) || $mintries < 1);
1334: $maxtries = $mintries if (! defined($maxtries) || $maxtries < $mintries);
1.96 matthew 1335: my @students;
1.26 matthew 1336: foreach my $row (@$PerformanceData) {
1337: next if (! defined($row));
1.47 matthew 1338: my $tries = &get_tries_from_row($row);
1.46 matthew 1339: my %Row = &Process_OR_Row($row);
1.43 matthew 1340: next if (! %Row);
1.96 matthew 1341: my $student_id = $row->[&Apache::loncoursedata::RD_student_id()];
1342: $students[$tries]->{$student_id}++;
1.42 matthew 1343: while (my ($foilid,$href) = each(%Row)) {
1344: if (! ref($href)) {
1345: $Trydata{$foilid}->[$tries] += $href;
1346: next;
1347: }
1348: while (my ($option,$value) = each(%$href)) {
1349: $Trydata{$foilid}->[$tries]->{$option}+=$value;
1.25 matthew 1350: }
1351: }
1352: }
1.96 matthew 1353: for (my $try=$mintries;$try<=$maxtries;$try++) {
1354: $Trydata{'_studentcount'}->[$try] = scalar(keys(%{$students[$try]}));
1355: }
1.25 matthew 1356: return %Trydata;
1357: }
1358:
1.33 matthew 1359: #########################################################
1.46 matthew 1360: #
1361: # Option Response: Time Analysis
1362: #
1.33 matthew 1363: #########################################################
1.57 matthew 1364: sub OR_time_analysis {
1.88 matthew 1365: my ($performance_data,$ORdata) = @_;
1.42 matthew 1366: my ($table,$Foils,$Concepts) = &build_foil_index($ORdata);
1.88 matthew 1367: my $foilkey = &build_option_index($ORdata);
1368: my $num_concepts = 1;
1369: if (defined($Concepts)) { $num_concepts = scalar(@$Concepts); }
1370: #
1371: if ($num_concepts < 2) {
1.42 matthew 1372: $table = '<h3>'.
1373: &mt('Not enough data for concept analysis. '.
1374: 'Performing Foil Analysis').
1.88 matthew 1375: '</h3>'.$table;
1.42 matthew 1376: }
1.88 matthew 1377: #
1.33 matthew 1378: my $num_plots = $ENV{'form.NumPlots'};
1.88 matthew 1379: my $num_data = scalar(@$performance_data)-1;
1.42 matthew 1380: #
1.96 matthew 1381: my $current_index;
1.37 matthew 1382: $table .= "<table>\n";
1.33 matthew 1383: for (my $i=0;$i<$num_plots;$i++) {
1.42 matthew 1384: ##
1.34 matthew 1385: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
1386: ('startdate_'.$i);
1387: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
1388: ('enddate_'.$i);
1389: if (! defined($starttime) || ! defined($endtime)) {
1.42 matthew 1390: my $sec_in_day = 86400;
1.88 matthew 1391: my $last_sub_time = &get_time_from_row($performance_data->[-1]);
1.96 matthew 1392: my ($sday,$smon,$syear) =
1393: (localtime($last_sub_time - $sec_in_day*$i))[3..5];
1.42 matthew 1394: $starttime = &Time::Local::timelocal(0,0,0,$sday,$smon,$syear);
1395: $endtime = $starttime + $sec_in_day;
1396: if ($i == ($num_plots -1 )) {
1.88 matthew 1397: $starttime = &get_time_from_row($performance_data->[0]);
1.42 matthew 1398: }
1399: }
1.96 matthew 1400: $table .= '<tr><td colspan="4" align="center"><font size="+1">'.
1.88 matthew 1401: &mt('Data from [_1] to [_2]',
1402: &Apache::lonlocal::locallocaltime($starttime),
1.96 matthew 1403: &Apache::lonlocal::locallocaltime($endtime)).
1404: '</font></td></tr>'.$/;
1.34 matthew 1405: my $startdateform = &Apache::lonhtmlcommon::date_setter
1406: ('Statistics','startdate_'.$i,$starttime);
1407: my $enddateform = &Apache::lonhtmlcommon::date_setter
1408: ('Statistics','enddate_'.$i,$endtime);
1.42 matthew 1409: #
1410: my $begin_index;
1411: my $end_index;
1412: my $j;
1.88 matthew 1413: while (++$j < scalar(@$performance_data)) {
1414: last if (&get_time_from_row($performance_data->[$j])
1.46 matthew 1415: > $starttime);
1.42 matthew 1416: }
1417: $begin_index = $j;
1.91 matthew 1418: while ($j < scalar(@$performance_data)) {
1419: if (&get_time_from_row($performance_data->[$j]) > $endtime) {
1420: last;
1421: } else {
1422: $j++;
1423: }
1.42 matthew 1424: }
1425: $end_index = $j;
1426: ##
1.96 matthew 1427: my ($processed_time_data,$correct,$data_count,$student_count) =
1428: &OR_time_process_data($performance_data,$begin_index,$end_index);
1429: ##
1430: $table .= '<tr><td colspan="4" align="center"><font size="+1">'.
1.102 matthew 1431: &mt('[_1] submissions from [_2] students, [_3] correct, [_4] incorrect',
1.96 matthew 1432: $data_count,$student_count,$correct,$data_count-$correct).
1433: '</font></td></tr>'.$/;
1.88 matthew 1434: my $concept_correct_plot = '';
1435: if ($num_concepts > 1) {
1436: $concept_correct_plot =
1.96 matthew 1437: &OR_Concept_Time_Analysis($processed_time_data,
1438: $correct,$data_count,$student_count,
1439: $ORdata,$Concepts);
1.42 matthew 1440: }
1.88 matthew 1441: my ($foil_correct_plot,$foil_incorrect_plot) =
1.96 matthew 1442: &OR_Foil_Time_Analysis($processed_time_data,
1443: $correct,$data_count,$student_count,
1444: $ORdata,$Foils,$Concepts);
1.88 matthew 1445: $table .= '<tr>'.
1446: '<td>'.$concept_correct_plot.'</td>'.
1447: '<td>'.$foil_correct_plot.'</td>'.
1448: '<td>'.$foil_incorrect_plot.'</td>'.
1449: '<td align="left" valign="top">'.$foilkey.'</td></tr>'.$/;
1450: $table .= '<tr><td colspan="4" align="center">'.
1.96 matthew 1451: &mt('Start time: [_1]',$startdateform).'<br />'.
1452: &mt('End time: [_1]',$enddateform).'</td></tr>'.$/;
1.88 matthew 1453: $table.= '<tr><td colspan="4"> </td></tr>'.$/;
1.33 matthew 1454: }
1.88 matthew 1455: $table .= '</table>';
1.42 matthew 1456: #
1.33 matthew 1457: return $table;
1458: }
1459:
1.57 matthew 1460: sub OR_Foil_Time_Analysis {
1.96 matthew 1461: my ($processed_time_data,$correct,$data_count,$student_count,
1462: $ORdata,$Foils,$Concepts) = @_;
1463: if ($data_count <= 0) {
1464: return ('<h2>'.&mt('There is no data to plot').'</h2>','');
1465: }
1.42 matthew 1466: my $analysis_html;
1.88 matthew 1467: my @plotdata;
1468: my @labels;
1469: foreach my $concept (@{$Concepts}) {
1470: foreach my $foil (@{$concept->{'foils'}}) {
1471: push(@labels,scalar(@labels)+1);
1.96 matthew 1472: my $total = $processed_time_data->{$foil}->{'_total'};
1.88 matthew 1473: if ($total == 0) {
1474: push(@{$plotdata[0]},0);
1.42 matthew 1475: } else {
1.88 matthew 1476: push(@{$plotdata[0]},
1.96 matthew 1477: 100 * $processed_time_data->{$foil}->{'_correct'} / $total);
1.37 matthew 1478: }
1.96 matthew 1479: my $total_incorrect = $total - $processed_time_data->{$foil}->{'_correct'};
1.88 matthew 1480: for (my $i=0;$i<scalar(@{$ORdata->{'_Options'}});$i++) {
1481: my $option = $ORdata->{'_Options'}->[$i];
1482: if ($total_incorrect == 0) {
1483: push(@{$plotdata[$i+1]},0);
1484: } else {
1485: push(@{$plotdata[$i+1]},
1.96 matthew 1486: 100 * $processed_time_data->{$foil}->{$option} / $total_incorrect);
1.88 matthew 1487: }
1488: }
1489: }
1490: # Put in a blank one
1491: push(@labels,'');
1492: push(@{$plotdata[0]},0);
1493: for (my $i=0;$i<scalar(@{$ORdata->{'_Options'}});$i++) {
1494: push(@{$plotdata[$i+1]},0);
1.39 matthew 1495: }
1.42 matthew 1496: }
1497: #
1498: # Create the plot
1.96 matthew 1499: my $correct_plot = &Apache::loncommon::DrawBarGraph('Correct Statements',
1500: 'Statement Number',
1501: 'Percent Correct',
1502: 100,
1503: $plotcolors,
1504: undef,
1505: $plotdata[0]);
1.88 matthew 1506: for (my $j=0; $j< scalar(@{$plotdata[0]});$j++) {
1507: $plotdata[0]->[$j]=0;
1.42 matthew 1508: }
1.96 matthew 1509: my $incorrect_plot =
1510: &Apache::loncommon::DrawBarGraph('Incorrect Statements',
1511: 'Statement Number',
1512: 'Incorrect Option Choice',
1513: 100,
1514: $plotcolors,
1515: undef,
1516: @plotdata);
1.88 matthew 1517: return ($correct_plot,$incorrect_plot);
1.42 matthew 1518: }
1519:
1.57 matthew 1520: sub OR_Concept_Time_Analysis {
1.96 matthew 1521: my ($processed_time_data,$correct,$data_count,$student_count,
1522: $ORdata,$Concepts) = @_;
1523: return '' if ($data_count == 0);
1.33 matthew 1524: #
1.42 matthew 1525: # Put the data in plottable form
1.88 matthew 1526: my @plotdata;
1.42 matthew 1527: foreach my $concept (@$Concepts) {
1528: my ($total,$correct);
1529: foreach my $foil (@{$concept->{'foils'}}) {
1.96 matthew 1530: $total += $processed_time_data->{$foil}->{'_total'};
1531: $correct += $processed_time_data->{$foil}->{'_correct'};
1.42 matthew 1532: }
1533: if ($total == 0) {
1.88 matthew 1534: push(@plotdata,0);
1.42 matthew 1535: } else {
1.88 matthew 1536: push(@plotdata,100 * $correct / $total);
1.42 matthew 1537: }
1538: }
1539: #
1.33 matthew 1540: # Create the plot
1.96 matthew 1541: return &Apache::loncommon::DrawBarGraph('Correct Concepts',
1.88 matthew 1542: 'Concept Number',
1543: 'Percent Correct',
1544: 100,
1545: $plotcolors,
1546: undef,
1547: \@plotdata);
1.42 matthew 1548: }
1549:
1.96 matthew 1550: sub OR_time_process_data {
1551: my ($performance_data,$begin_index,$end_index)=@_;
1552: my %processed_time_data;
1553: my %distinct_students;
1554: my ($correct,$data_count);
1555: if (($begin_index == $end_index) &&
1556: ($end_index != scalar(@$performance_data)-1)) {
1557: return undef;
1558: }
1559: # Be sure we include the last one if we are asked for it.
1560: # That we have to correct here (and not when $end_index is
1561: # given a value) should probably be considered a bug.
1562: if ($end_index == scalar(@$performance_data)-1) {
1563: $end_index++;
1564: }
1565: my $count;
1566: for (my $i=$begin_index;$i<$end_index;$i++) {
1567: my $attempt = $performance_data->[$i];
1568: $count++;
1569: next if (! defined($attempt));
1570: my %attempt = &Process_OR_Row($attempt);
1571: $data_count++;
1572: $correct += $attempt{'_correct'};
1573: $distinct_students{$attempt->[&Apache::loncoursedata::RD_student_id()]}++;
1574: while (my ($foilid,$href) = each(%attempt)) {
1575: if (! ref($href)) {
1576: $processed_time_data{$foilid} += $href;
1577: next;
1578: }
1579: while (my ($option,$value) = each(%$href)) {
1580: $processed_time_data{$foilid}->{$option}+=$value;
1581: }
1582: }
1583: }
1584: return (\%processed_time_data,$correct,$data_count,
1585: scalar(keys(%distinct_students)));
1586: }
1587:
1.42 matthew 1588: #########################################################
1589: #########################################################
1590: ##
1591: ## Excel output
1592: ##
1593: #########################################################
1594: #########################################################
1.57 matthew 1595: sub OR_excel_sheet {
1.88 matthew 1596: my ($r,$resource,$performance_data,$ORdata) = @_;
1.44 matthew 1597: my $response = '';
1.42 matthew 1598: my (undef,$Foils,$Concepts) = &build_foil_index($ORdata);
1.43 matthew 1599: #
1600: # Create excel worksheet
1601: my $filename = '/prtspool/'.
1602: $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.
1603: time.'_'.rand(1000000000).'.xls';
1604: my $workbook = Spreadsheet::WriteExcel->new('/home/httpd'.$filename);
1605: if (! defined($workbook)) {
1606: $r->log_error("Error creating excel spreadsheet $filename: $!");
1607: $r->print('<p>'.&mt("Unable to create new Excel file. ".
1608: "This error has been logged. ".
1609: "Please alert your LON-CAPA administrator").
1610: '</p>');
1611: return undef;
1612: }
1613: #
1614: $workbook->set_tempdir('/home/httpd/perl/tmp');
1.69 matthew 1615: my $format = &Apache::loncommon::define_excel_formats($workbook);
1.43 matthew 1616: #
1617: # Create and populate main worksheets
1618: my $problem_data_sheet = $workbook->addworksheet('Problem Data');
1.69 matthew 1619: my $student_data_sheet = &build_student_data_worksheet($workbook,$format);
1.43 matthew 1620: my $response_data_sheet = $workbook->addworksheet('Response Data');
1621: foreach my $sheet ($problem_data_sheet,$student_data_sheet,
1622: $response_data_sheet) {
1623: $sheet->write(0,0,$resource->{'title'},$format->{'h2'});
1624: $sheet->write(1,0,$resource->{'src'},$format->{'h3'});
1625: }
1626: #
1627: my $result;
1.59 matthew 1628: $result = &OR_build_problem_data_worksheet($problem_data_sheet,$format,
1.43 matthew 1629: $Concepts,$ORdata);
1630: if ($result ne 'okay') {
1631: # Do something useful
1632: }
1.59 matthew 1633: $result = &OR_build_response_data_worksheet($response_data_sheet,$format,
1.88 matthew 1634: $performance_data,$Foils,
1.43 matthew 1635: $ORdata);
1636: if ($result ne 'okay') {
1637: # Do something useful
1638: }
1.44 matthew 1639: $response_data_sheet->activate();
1.43 matthew 1640: #
1641: # Close the excel file
1642: $workbook->close();
1643: #
1644: # Write a link to allow them to download it
1.44 matthew 1645: $result .= '<h2>'.&mt('Excel Raw Data Output').'</h2>'.
1646: '<p><a href="'.$filename.'">'.
1647: &mt('Your Excel spreadsheet.').
1648: '</a></p>'."\n";
1.43 matthew 1649: return $result;
1650: }
1651:
1.57 matthew 1652: sub OR_build_problem_data_worksheet {
1.43 matthew 1653: my ($worksheet,$format,$Concepts,$ORdata) = @_;
1654: my $rows_output = 3;
1655: my $cols_output = 0;
1656: $worksheet->write($rows_output++,0,'Problem Structure',$format->{'h3'});
1657: ##
1658: ##
1659: my @Headers;
1660: if (@$Concepts > 1) {
1661: @Headers = ("Concept\nNumber",'Concept',"Foil\nNumber",
1662: 'Foil Name','Foil Text','Correct value');
1663: } else {
1664: @Headers = ('Foil Number','FoilName','Foil Text','Correct value');
1665: }
1666: $worksheet->write_row($rows_output++,0,\@Headers,$format->{'header'});
1.48 matthew 1667: my %Foildata = %{$ORdata->{'_Foils'}};
1.43 matthew 1668: my $conceptindex = 1;
1669: my $foilindex = 1;
1670: foreach my $concept (@$Concepts) {
1671: my @FoilsInConcept = @{$concept->{'foils'}};
1672: my $firstfoil = shift(@FoilsInConcept);
1673: if (@$Concepts > 1) {
1674: $worksheet->write_row($rows_output++,0,
1675: [$conceptindex,
1676: $concept->{'name'},
1677: $foilindex++,
1678: $Foildata{$firstfoil}->{'name'},
1679: $Foildata{$firstfoil}->{'text'},
1680: $Foildata{$firstfoil}->{'value'},]);
1681: } else {
1682: $worksheet->write_row($rows_output++,0,
1683: [ $foilindex++,
1684: $Foildata{$firstfoil}->{'name'},
1685: $Foildata{$firstfoil}->{'text'},
1686: $Foildata{$firstfoil}->{'value'},]);
1687: }
1688: foreach my $foilid (@FoilsInConcept) {
1689: if (@$Concepts > 1) {
1690: $worksheet->write_row($rows_output++,0,
1691: ['',
1692: '',
1693: $foilindex,
1694: $Foildata{$foilid}->{'name'},
1695: $Foildata{$foilid}->{'text'},
1696: $Foildata{$foilid}->{'value'},]);
1697: } else {
1698: $worksheet->write_row($rows_output++,0,
1699: [$foilindex,
1700: $Foildata{$foilid}->{'name'},
1701: $Foildata{$foilid}->{'text'},
1702: $Foildata{$foilid}->{'value'},]);
1703: }
1704: } continue {
1705: $foilindex++;
1706: }
1707: } continue {
1708: $conceptindex++;
1709: }
1710: $rows_output++;
1711: $rows_output++;
1712: ##
1713: ## Option data output
1714: $worksheet->write($rows_output++,0,'Options',$format->{'header'});
1.48 matthew 1715: foreach my $string (@{$ORdata->{'_Options'}}) {
1.43 matthew 1716: $worksheet->write($rows_output++,0,$string);
1717: }
1718: return 'okay';
1719: }
1720:
1.57 matthew 1721: sub OR_build_response_data_worksheet {
1.88 matthew 1722: my ($worksheet,$format,$performance_data,$Foils,$ORdata)=@_;
1.43 matthew 1723: my $rows_output = 3;
1724: my $cols_output = 0;
1725: $worksheet->write($rows_output++,0,'Response Data',$format->{'h3'});
1726: $worksheet->set_column(1,1,20);
1727: $worksheet->set_column(2,2,13);
1728: my @Headers = ('identifier','time','award detail','attempt');
1729: foreach my $foil (@$Foils) {
1730: push (@Headers,$foil.' submission');
1731: push (@Headers,$foil.' grading');
1732: }
1733: $worksheet->write_row($rows_output++,0,\@Headers,$format->{'header'});
1734: #
1.88 matthew 1735: foreach my $row (@$performance_data) {
1.43 matthew 1736: next if (! defined($row));
1737: my ($student,$award,$grading,$submission,$time,$tries) = @$row;
1738: my @Foilgrades = split('&',$grading);
1739: my @Foilsubs = split('&',$submission);
1.88 matthew 1740: my %response_data;
1.43 matthew 1741: for (my $j=0;$j<=$#Foilgrades;$j++) {
1742: my ($foilid,$correct) = split('=',$Foilgrades[$j]);
1743: my (undef,$submission) = split('=',$Foilsubs[$j]);
1744: $submission = &Apache::lonnet::unescape($submission);
1.88 matthew 1745: $response_data{$foilid.' submission'}=$submission;
1746: $response_data{$foilid.' award'}=$correct;
1.43 matthew 1747: }
1748: $worksheet->write($rows_output,$cols_output++,$student);
1749: $worksheet->write($rows_output,$cols_output++,
1.71 matthew 1750: &Apache::lonstathelpers::calc_serial($time),$format->{'date'});
1.43 matthew 1751: $worksheet->write($rows_output,$cols_output++,$award);
1752: $worksheet->write($rows_output,$cols_output++,$tries);
1753: foreach my $foilid (@$Foils) {
1754: $worksheet->write($rows_output,$cols_output++,
1.88 matthew 1755: $response_data{$foilid.' submission'});
1.43 matthew 1756: $worksheet->write($rows_output,$cols_output++,
1.88 matthew 1757: $response_data{$foilid.' award'});
1.43 matthew 1758: }
1759: $rows_output++;
1760: $cols_output = 0;
1761: }
1762: return;
1.42 matthew 1763: }
1764:
1.46 matthew 1765: sub build_foil_index {
1766: my ($ORdata) = @_;
1.48 matthew 1767: return if (! exists($ORdata->{'_Foils'}));
1768: my %Foildata = %{$ORdata->{'_Foils'}};
1.46 matthew 1769: my @Foils = sort(keys(%Foildata));
1770: my %Concepts;
1771: foreach my $foilid (@Foils) {
1.48 matthew 1772: push(@{$Concepts{$Foildata{$foilid}->{'_Concept'}}},
1.46 matthew 1773: $foilid);
1774: }
1775: undef(@Foils);
1776: # Having gathered the concept information in a hash, we now translate it
1777: # into an array because we need to be consistent about order.
1778: # Also put the foils in order, too.
1779: my $sortfunction = sub {
1780: my %Numbers = (one => 1,
1781: two => 2,
1782: three => 3,
1783: four => 4,
1784: five => 5,
1785: six => 6,
1786: seven => 7,
1787: eight => 8,
1788: nine => 9,
1789: ten => 10,);
1790: my $a1 = lc($a);
1791: my $b1 = lc($b);
1.57 matthew 1792: if (exists($Numbers{$a1})) {
1.67 matthew 1793: $a1 = $Numbers{$a1};
1.57 matthew 1794: }
1795: if (exists($Numbers{$b1})) {
1.67 matthew 1796: $b1 = $Numbers{$b1};
1.46 matthew 1797: }
1.67 matthew 1798: if (($a1 =~/^\d+$/) && ($b1 =~/^\d+$/)) {
1799: return $a1 <=> $b1;
1.57 matthew 1800: } else {
1.67 matthew 1801: return $a1 cmp $b1;
1.46 matthew 1802: }
1803: };
1804: my @Concepts;
1805: foreach my $concept (sort $sortfunction (keys(%Concepts))) {
1.57 matthew 1806: if (! defined($Concepts{$concept})) {
1807: $Concepts{$concept}=[];
1808: # next;
1809: }
1.46 matthew 1810: push(@Concepts,{ name => $concept,
1811: foils => [@{$Concepts{$concept}}]});
1812: push(@Foils,(@{$Concepts{$concept}}));
1813: }
1814: #
1815: # Build up the table of row labels.
1816: my $table = '<table border="1" >'."\n";
1817: if (@Concepts > 1) {
1818: $table .= '<tr>'.
1819: '<th>'.&mt('Concept Number').'</th>'.
1820: '<th>'.&mt('Concept').'</th>'.
1821: '<th>'.&mt('Foil Number').'</th>'.
1822: '<th>'.&mt('Foil Name').'</th>'.
1823: '<th>'.&mt('Foil Text').'</th>'.
1824: '<th>'.&mt('Correct Value').'</th>'.
1825: "</tr>\n";
1826: } else {
1827: $table .= '<tr>'.
1828: '<th>'.&mt('Foil Number').'</th>'.
1829: '<th>'.&mt('Foil Name').'</th>'.
1830: '<th>'.&mt('Foil Text').'</th>'.
1831: '<th>'.&mt('Correct Value').'</th>'.
1832: "</tr>\n";
1833: }
1834: my $conceptindex = 1;
1835: my $foilindex = 1;
1836: foreach my $concept (@Concepts) {
1837: my @FoilsInConcept = @{$concept->{'foils'}};
1838: my $firstfoil = shift(@FoilsInConcept);
1839: if (@Concepts > 1) {
1840: $table .= '<tr>'.
1841: '<td>'.$conceptindex.'</td>'.
1.83 albertel 1842: '<td>'.&HTML::Entities::encode($concept->{'name'},'<>&"').'</td>'.
1.46 matthew 1843: '<td>'.$foilindex++.'</td>'.
1.83 albertel 1844: '<td>'.&HTML::Entities::encode($Foildata{$firstfoil}->{'name'},'<>&"').'</td>'.
1.65 matthew 1845: '<td>'.$Foildata{$firstfoil}->{'text'}.'</td>'.
1.83 albertel 1846: '<td>'.&HTML::Entities::encode($Foildata{$firstfoil}->{'value'},'<>&"').'</td>'.
1.46 matthew 1847: "</tr>\n";
1848: } else {
1849: $table .= '<tr>'.
1850: '<td>'.$foilindex++.'</td>'.
1.83 albertel 1851: '<td>'.&HTML::Entities::encode($Foildata{$firstfoil}->{'name'},'<>&"').'</td>'.
1.65 matthew 1852: '<td>'.$Foildata{$firstfoil}->{'text'}.'</td>'.
1.83 albertel 1853: '<td>'.&HTML::Entities::encode($Foildata{$firstfoil}->{'value'},'<>&"').'</td>'.
1.46 matthew 1854: "</tr>\n";
1855: }
1856: foreach my $foilid (@FoilsInConcept) {
1857: if (@Concepts > 1) {
1858: $table .= '<tr>'.
1859: '<td></td>'.
1860: '<td></td>'.
1861: '<td>'.$foilindex.'</td>'.
1.83 albertel 1862: '<td>'.&HTML::Entities::encode($Foildata{$foilid}->{'name'},'<>&"').'</td>'.
1.65 matthew 1863: '<td>'.$Foildata{$foilid}->{'text'}.'</td>'.
1.84 albertel 1864: '<td>'.&HTML::Entities::encode($Foildata{$foilid}->{'value'},'<>&"').'</td>'.
1.46 matthew 1865: "</tr>\n";
1866: } else {
1867: $table .= '<tr>'.
1868: '<td>'.$foilindex.'</td>'.
1.83 albertel 1869: '<td>'.&HTML::Entities::encode($Foildata{$foilid}->{'name'},'<>&"').'</td>'.
1.65 matthew 1870: '<td>'.$Foildata{$foilid}->{'text'}.'</td>'.
1.83 albertel 1871: '<td>'.&HTML::Entities::encode($Foildata{$foilid}->{'value'},'<>&"').'</td>'.
1.46 matthew 1872: "</tr>\n";
1873: }
1874: } continue {
1875: $foilindex++;
1876: }
1877: } continue {
1878: $conceptindex++;
1879: }
1880: $table .= "</table>\n";
1881: #
1882: # Build option index with color stuff
1883: return ($table,\@Foils,\@Concepts);
1884: }
1885:
1886: sub build_option_index {
1887: my ($ORdata)= @_;
1888: my $table = "<table>\n";
1889: my $optionindex = 0;
1890: my @Rows;
1.48 matthew 1891: foreach my $option (&mt('correct option chosen'),@{$ORdata->{'_Options'}}) {
1.95 matthew 1892: my $color = $plotcolors->[$optionindex++];
1.46 matthew 1893: push (@Rows,
1894: '<tr>'.
1.95 matthew 1895: '<td bgcolor="'.$color.'">'.
1896: '<font color="'.$color.'">'.('*'x3).'</font>'.'</td>'.
1.83 albertel 1897: '<td>'.&HTML::Entities::encode($option,'<>&"').'</td>'.
1.46 matthew 1898: "</tr>\n");
1899: }
1900: shift(@Rows); # Throw away 'correct option chosen' color
1901: $table .= join('',reverse(@Rows));
1902: $table .= "</table>\n";
1903: }
1904:
1.94 matthew 1905: sub build_foil_key {
1906: my ($foils,$extra_data)= @_;
1907: if (! defined($extra_data)) { $extra_data = {}; }
1908: my $table = "<table>\n";
1909: my $foil_index = 0;
1910: my @rows;
1911: foreach my $foil (&mt('correct foil chosen'),@{$foils}) {
1.95 matthew 1912: my $color = $plotcolors->[$foil_index++];
1.94 matthew 1913: push (@rows,
1914: '<tr>'.
1.95 matthew 1915: '<td bgcolor="'.$color.'" class="key">'.
1916: '<font color="'.$color.'">'.('*'x4).'</font></td>'.
1.94 matthew 1917: '<td>'.&HTML::Entities::encode($foil,'<>&"').
1918: (' 'x2).$extra_data->{$foil}.'</td>'.
1919: "</tr>\n");
1920: }
1921: shift(@rows); # Throw away 'correct foil chosen' color
1922: $table .= join('',reverse(@rows));
1923: $table .= "</table>\n";
1924: }
1925:
1.33 matthew 1926: #########################################################
1927: #########################################################
1928: ##
1.46 matthew 1929: ## Generic Interface Routines
1.33 matthew 1930: ##
1931: #########################################################
1932: #########################################################
1.23 matthew 1933: sub CreateInterface {
1.28 matthew 1934: ##
1935: ## Environment variable initialization
1.36 matthew 1936: if (! exists$ENV{'form.AnalyzeOver'}) {
1.94 matthew 1937: $ENV{'form.AnalyzeOver'} = 'tries';
1.28 matthew 1938: }
1939: ##
1940: ## Build the menu
1.7 stredwic 1941: my $Str = '';
1.72 matthew 1942: $Str .= &Apache::lonhtmlcommon::breadcrumbs
1.74 matthew 1943: (undef,'Detailed Problem Analysis');
1.23 matthew 1944: $Str .= '<table cellspacing="5">'."\n";
1945: $Str .= '<tr>';
1946: $Str .= '<td align="center"><b>'.&mt('Sections').'</b></td>';
1947: $Str .= '<td align="center"><b>'.&mt('Enrollment Status').'</b></td>';
1.31 matthew 1948: # $Str .= '<td align="center"><b>'.&mt('Sequences and Folders').'</b></td>';
1949: $Str .= '<td align="center"> </td>';
1.23 matthew 1950: $Str .= '</tr>'."\n";
1.31 matthew 1951: ##
1952: ##
1.23 matthew 1953: $Str .= '<tr><td align="center">'."\n";
1954: $Str .= &Apache::lonstatistics::SectionSelect('Section','multiple',5);
1.28 matthew 1955: $Str .= '</td>';
1956: #
1957: $Str .= '<td align="center">';
1.23 matthew 1958: $Str .= &Apache::lonhtmlcommon::StatusOptions(undef,undef,5);
1.28 matthew 1959: $Str .= '</td>';
1960: #
1.31 matthew 1961: # $Str .= '<td align="center">';
1.23 matthew 1962: my $only_seq_with_assessments = sub {
1963: my $s=shift;
1964: if ($s->{'num_assess'} < 1) {
1965: return 0;
1966: } else {
1967: return 1;
1968: }
1969: };
1.31 matthew 1970: &Apache::lonstatistics::MapSelect('Maps','multiple,all',5,
1.23 matthew 1971: $only_seq_with_assessments);
1.36 matthew 1972: ##
1973: ##
1.28 matthew 1974: $Str .= '<td>';
1.91 matthew 1975: ##
1976: my $showprob_checkbox =
1977: '<input type="checkbox" name="show_prob" value="true" ';
1978: if ($ENV{'form.show_prob'} eq 'true') {
1979: $showprob_checkbox .= 'checked ';
1980: }
1981: $showprob_checkbox.= ' />';
1982: $Str.= '<nobr><label>'.
1983: &mt('Show problem [_1]',$showprob_checkbox).
1984: '</label></nobr><br />';
1985: ##
1.90 matthew 1986: my $analyze_selector = '<select name="AnalyzeOver" >';
1.94 matthew 1987: $analyze_selector .= '<option value="tries" ';
1.90 matthew 1988: if (! exists($ENV{'form.AnalyzeOver'}) ||
1.94 matthew 1989: $ENV{'form.AnalyzeOver'} eq 'tries'){
1990: # Default to tries
1.90 matthew 1991: $analyze_selector .= ' selected ';
1992: }
1993: $analyze_selector .= '>'.&mt('Tries').'</option>';
1.94 matthew 1994: $analyze_selector .= '<option value="time" ';
1995: $analyze_selector .= ' selected ' if ($ENV{'form.AnalyzeOver'} eq 'time');
1.90 matthew 1996: $analyze_selector .= '>'.&mt('Time').'</option>';
1997: $analyze_selector .= '</select>';
1.91 matthew 1998: $Str .= '<nobr><label>'.
1.90 matthew 1999: &mt('Analyze Over [_1] [_2]',
2000: $analyze_selector,
2001: &Apache::loncommon::help_open_topic('Analysis_Analyze_Over')).
1.91 matthew 2002: '</label></nobr><br />'.$/;
1.90 matthew 2003: ##
2004: my $numplots_selector = '<select name="NumPlots">';
2005: if (! exists($ENV{'form.NumPlots'})
2006: || $ENV{'form.NumPlots'} < 1
2007: || $ENV{'form.NumPlots'} > 20) {
2008: $ENV{'form.NumPlots'} = 5;
2009: }
2010: foreach my $i (1,2,3,4,5,6,7,8,10,15,20) {
2011: $numplots_selector .= '<option value="'.$i.'" ';
2012: if ($ENV{'form.NumPlots'} == $i) { $numplots_selector.=' selected '; }
2013: $numplots_selector .= '>'.$i.'</option>';
2014: }
2015: $numplots_selector .= '</select></nobr><br />';
2016: $Str .= '<nobr><label>'.&mt('Number of Plots [_1]',$numplots_selector).
2017: '</label></nobr>';
2018: ##
2019: $Str .= '<nobr><label>'.&mt('Status: [_1]',
1.85 matthew 2020: '<input type="text" '.
2021: 'name="stats_status" size="60" value="" />'
2022: ).
1.90 matthew 2023: '</label></nobr>';
1.28 matthew 2024: $Str .= '</td>';
1.36 matthew 2025: ##
2026: ##
1.28 matthew 2027: $Str .= '</tr>'."\n";
1.23 matthew 2028: $Str .= '</table>'."\n";
1.42 matthew 2029: return $Str;
1.54 matthew 2030: }
1.47 matthew 2031:
2032: #########################################################
2033: #########################################################
2034: ##
2035: ## Misc Option Response functions
2036: ##
2037: #########################################################
2038: #########################################################
2039: sub get_time_from_row {
1.42 matthew 2040: my ($row) = @_;
2041: if (ref($row)) {
1.47 matthew 2042: return $row->[&Apache::loncoursedata::RD_timestamp()];
1.42 matthew 2043: }
2044: return undef;
2045: }
2046:
1.47 matthew 2047: sub get_tries_from_row {
1.42 matthew 2048: my ($row) = @_;
2049: if (ref($row)) {
1.47 matthew 2050: return $row->[&Apache::loncoursedata::RD_tries()];
1.42 matthew 2051: }
2052: return undef;
2053: }
2054:
1.48 matthew 2055: sub hashify_attempt {
2056: my ($row) = @_;
2057: my %attempt;
1.94 matthew 2058: $attempt{'student'} = $row->[&Apache::loncoursedata::RD_sname()];
1.48 matthew 2059: $attempt{'tries'} = $row->[&Apache::loncoursedata::RD_tries()];
1.94 matthew 2060: $attempt{'submission'} = &Apache::lonnet::unescape($row->[&Apache::loncoursedata::RD_submission()]);
1.48 matthew 2061: $attempt{'award'} = $row->[&Apache::loncoursedata::RD_awarddetail()];
2062: $attempt{'timestamp'} = $row->[&Apache::loncoursedata::RD_timestamp()];
2063: return %attempt;
2064: }
2065:
1.46 matthew 2066: sub Process_OR_Row {
1.42 matthew 2067: my ($row) = @_;
2068: my %RowData;
1.96 matthew 2069: # my $student_id = $row->[&Apache::loncoursedata::RD_student_id()];
1.47 matthew 2070: my $award = $row->[&Apache::loncoursedata::RD_awarddetail()];
2071: my $grading = $row->[&Apache::loncoursedata::RD_response_eval()];
2072: my $submission = $row->[&Apache::loncoursedata::RD_submission()];
2073: my $time = $row->[&Apache::loncoursedata::RD_timestamp()];
1.96 matthew 2074: # my $tries = $row->[&Apache::loncoursedata::RD_tries()];
1.43 matthew 2075: return undef if ($award eq 'MISSING_ANSWER');
1.97 matthew 2076: if (&submission_is_correct($award)) {
1.42 matthew 2077: $RowData{'_correct'} = 1;
2078: }
2079: $RowData{'_total'} = 1;
2080: my @Foilgrades = split('&',$grading);
2081: my @Foilsubs = split('&',$submission);
2082: for (my $j=0;$j<=$#Foilgrades;$j++) {
2083: my ($foilid,$correct) = split('=',$Foilgrades[$j]);
1.58 matthew 2084: $foilid = &Apache::lonnet::unescape($foilid);
1.42 matthew 2085: my (undef,$submission) = split('=',$Foilsubs[$j]);
2086: if ($correct) {
2087: $RowData{$foilid}->{'_correct'}++;
2088: } else {
2089: $submission = &Apache::lonnet::unescape($submission);
2090: $RowData{$foilid}->{$submission}++;
2091: }
2092: $RowData{$foilid}->{'_total'}++;
2093: }
2094: return %RowData;
1.47 matthew 2095: }
2096:
1.97 matthew 2097: sub submission_is_correct {
2098: my ($award) = @_;
2099: if ($award =~ /(APPROX_ANS|EXACT_ANS)/) {
2100: return 1;
2101: } else {
2102: return 0;
2103: }
2104: }
2105:
1.23 matthew 2106: 1;
1.1 stredwic 2107:
2108: __END__
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