Annotation of loncom/interface/statistics/lonstudentassessment.pm, revision 1.50
1.1 stredwic 1: # The LearningOnline Network with CAPA
2: #
1.50 ! matthew 3: # $Id: lonstudentassessment.pm,v 1.49 2003/05/29 21:38:32 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: # LON-CAPA is free software; you can redistribute it and/or modify
9: # it under the terms of the GNU General Public License as published by
10: # the Free Software Foundation; either version 2 of the License, or
11: # (at your option) any later version.
12: #
13: # LON-CAPA is distributed in the hope that it will be useful,
14: # but WITHOUT ANY WARRANTY; without even the implied warranty of
15: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16: # GNU General Public License for more details.
17: #
18: # You should have received a copy of the GNU General Public License
19: # along with LON-CAPA; if not, write to the Free Software
20: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21: #
22: # /home/httpd/html/adm/gpl.txt
23: #
24: # http://www.lon-capa.org/
25: #
26: # (Navigate problems for statistical reports
1.28 matthew 27: #
28: #######################################################
29: #######################################################
30:
31: =pod
32:
33: =head1 NAME
34:
35: lonstudentassessment
36:
37: =head1 SYNOPSIS
38:
39: Presents assessment data about a student or a group of students.
40:
41: =head1 Subroutines
42:
43: =over 4
44:
45: =cut
46:
47: #######################################################
48: #######################################################
1.1 stredwic 49:
1.21 minaeibi 50: package Apache::lonstudentassessment;
1.1 stredwic 51:
52: use strict;
1.28 matthew 53: use Apache::lonstatistics;
1.1 stredwic 54: use Apache::lonhtmlcommon;
55: use Apache::loncoursedata;
1.28 matthew 56: use Apache::lonnet; # for logging porpoises
1.31 matthew 57: use Spreadsheet::WriteExcel;
58:
59: #######################################################
60: #######################################################
61: =pod
62:
63: =item Package Variables
64:
65: =over 4
66:
67: =item $Statistics Hash ref to store student data. Indexed by symb,
68: contains hashes with keys 'score' and 'max'.
69:
70: =cut
71:
72: #######################################################
73: #######################################################
1.1 stredwic 74:
1.30 matthew 75: my $Statistics;
76:
1.28 matthew 77: #######################################################
78: #######################################################
79:
80: =pod
81:
1.31 matthew 82: =item $show_links 'yes' or 'no' for linking to student performance data
83:
84: =item $output_mode 'html', 'excel', or 'csv' for output mode
85:
1.32 matthew 86: =item $show 'all', 'totals', or 'scores' determines how much data is output
1.31 matthew 87:
1.49 matthew 88: =item $single_student_mode evaluates to true if we are showing only one
89: student.
90:
1.31 matthew 91: =cut
92:
93: #######################################################
94: #######################################################
95: my $show_links;
96: my $output_mode;
97: my $show;
1.49 matthew 98: my $single_student_mode;
1.28 matthew 99:
1.31 matthew 100: #######################################################
101: #######################################################
102: # End of package variable declarations
1.28 matthew 103:
1.31 matthew 104: =pod
1.28 matthew 105:
1.31 matthew 106: =back
1.28 matthew 107:
1.31 matthew 108: =cut
1.28 matthew 109:
1.31 matthew 110: #######################################################
111: #######################################################
1.28 matthew 112:
1.31 matthew 113: =pod
1.28 matthew 114:
1.31 matthew 115: =item &BuildStudentAssessmentPage()
1.28 matthew 116:
1.31 matthew 117: Inputs:
1.4 stredwic 118:
1.31 matthew 119: =over 4
1.28 matthew 120:
121: =item $r Apache Request
122:
123: =item $c Apache Connection
124:
125: =back
126:
127: =cut
128:
129: #######################################################
130: #######################################################
1.1 stredwic 131: sub BuildStudentAssessmentPage {
1.30 matthew 132: my ($r,$c)=@_;
133: undef($Statistics);
1.49 matthew 134: $single_student_mode = 1 if ($ENV{'form.SelectedStudent'});
1.30 matthew 135: #
1.31 matthew 136: # Print out the HTML headers for the interface
137: # This also parses the output mode selector
138: # This step must always be done.
1.30 matthew 139: $r->print(&CreateInterface());
1.31 matthew 140: $r->print('<input type="hidden" name="notfirstrun" value="true" />');
1.49 matthew 141: $r->print('<input type="hidden" name="sort" value="'.
142: $ENV{'form.sort'}.'" />');
1.7 stredwic 143: $r->rflush();
1.49 matthew 144: if (! exists($ENV{'form.notfirstrun'}) && ! $single_student_mode) {
1.31 matthew 145: $r->print(<<ENDMSG);
146: <p>
1.48 matthew 147: <font size="+2">
1.31 matthew 148: Please make your selections in the boxes above and hit
149: the button marked "Update Display".
150: </font>
151: </p>
152: ENDMSG
1.33 matthew 153: # $r->print(&OutputDescriptions());
1.31 matthew 154: return;
155: }
156: #
157: #
158: my $initialize = \&html_initialize;
159: my $output_student = \&html_outputstudent;
160: my $finish = \&html_finish;
161: #
162: if ($output_mode eq 'excel') {
163: $initialize = \&excel_initialize;
164: $output_student = \&excel_outputstudent;
165: $finish = \&excel_finish;
1.48 matthew 166: # } elsif ($output_mode eq 'multi-sheet excel') {
167: # $initialize = \&multi_sheet_excel_initialize;
168: # $output_student = \&multi_sheet_excel_outputstudent;
169: # $finish = \&multi_sheet_excel_finish;
1.31 matthew 170: } elsif ($output_mode eq 'csv') {
171: $initialize = \&csv_initialize;
172: $output_student = \&csv_outputstudent;
173: $finish = \&csv_finish;
174: }
1.30 matthew 175: #
176: if($c->aborted()) { return ; }
1.31 matthew 177: #
1.49 matthew 178: # Determine which students we want to look at
179: my @Students;
180: if ($single_student_mode) {
181: @Students = (&Apache::lonstatistics::current_student());
182: $r->print(&next_and_previous_buttons());
183: $r->rflush();
184: } else {
185: @Students = @Apache::lonstatistics::Students;
186: }
187: #
1.31 matthew 188: # Call the initialize routine selected above
189: $initialize->($r);
1.49 matthew 190: foreach my $student (@Students) {
1.31 matthew 191: if($c->aborted()) {
192: $finish->($r);
193: return ;
1.1 stredwic 194: }
1.31 matthew 195: # Call the output_student routine selected above
196: $output_student->($r,$student);
197: }
198: # Call the "finish" routine selected above
199: $finish->($r);
200: #
201: return;
202: }
203:
204: #######################################################
205: #######################################################
1.49 matthew 206: sub next_and_previous_buttons {
207: my $Str = '';
208: $Str .= '<input type="hidden" name="SelectedStudent" value="'.
209: $ENV{'form.SelectedStudent'}.'" />';
210: #
211: # Build the previous student link
212: my $previous = &Apache::lonstatistics::previous_student();
213: my $previousbutton = '';
214: if (defined($previous)) {
215: my $sname = $previous->{'username'}.':'.$previous->{'domain'};
216: $previousbutton .= '<input type="button" value="'.
217: 'Previous Student ('.
218: $previous->{'username'}.'@'.$previous->{'domain'}.')'.
219: '" onclick="document.Statistics.SelectedStudent.value='.
220: "'".$sname."'".';'.
221: 'document.Statistics.submit();" />';
222: } else {
223: $previousbutton .= '<input type="button" value="'.
224: 'Previous student (none)'.'" />';
225: }
226: #
227: # Build the next student link
228: my $next = &Apache::lonstatistics::next_student();
229: my $nextbutton = '';
230: if (defined($next)) {
231: my $sname = $next->{'username'}.':'.$next->{'domain'};
232: $nextbutton .= '<input type="button" value="'.
233: 'Next Student ('.
234: $next->{'username'}.'@'.$next->{'domain'}.')'.
235: '" onclick="document.Statistics.SelectedStudent.value='.
236: "'".$sname."'".';'.
237: 'document.Statistics.submit();" />';
238: } else {
239: $nextbutton .= '<input type="button" value="'.
240: 'Next student (none)'.'" />';
241: }
242: #
243: # Build the 'all students' button
244: my $all = '';
245: $all .= '<input type="button" value="All Students" '.
246: '" onclick="document.Statistics.SelectedStudent.value='.
247: "''".';'.'document.Statistics.submit();" />';
248: $Str .= $previousbutton.(' 'x5).$all.(' 'x5).$nextbutton;
249: return $Str;
250: }
251:
252: #######################################################
253: #######################################################
1.30 matthew 254:
1.31 matthew 255: sub get_student_fields_to_show {
256: my @to_show = @Apache::lonstatistics::SelectedStudentData;
257: foreach (@to_show) {
258: if ($_ eq 'all') {
259: @to_show = @Apache::lonstatistics::StudentDataOrder;
260: last;
261: }
262: }
263: return @to_show;
264: }
265:
1.28 matthew 266: #######################################################
267: #######################################################
268:
269: =pod
1.2 stredwic 270:
1.28 matthew 271: =item &CreateInterface()
1.21 minaeibi 272:
1.28 matthew 273: Called by &BuildStudentAssessmentPage to create the top part of the
274: page which displays the chart.
275:
1.30 matthew 276: Inputs: None
1.28 matthew 277:
278: Returns: A string containing the HTML for the headers and top table for
279: the chart page.
280:
281: =cut
282:
283: #######################################################
284: #######################################################
1.2 stredwic 285: sub CreateInterface {
1.4 stredwic 286: my $Str = '';
1.30 matthew 287: # $Str .= &CreateLegend();
288: $Str .= '<table cellspacing="5">'."\n";
289: $Str .= '<tr>';
290: $Str .= '<td align="center"><b>Sections</b></td>';
291: $Str .= '<td align="center"><b>Student Data</b></td>';
1.46 matthew 292: $Str .= '<td align="center"><b>Enrollment Status</b></td>';
1.41 matthew 293: $Str .= '<td align="center"><b>Sequences and Folders</b></td>';
1.31 matthew 294: $Str .= '<td align="center"><b>Output Format</b></td>';
1.30 matthew 295: $Str .= '</tr>'."\n";
296: #
1.4 stredwic 297: $Str .= '<tr><td align="center">'."\n";
1.29 matthew 298: $Str .= &Apache::lonstatistics::SectionSelect('Section','multiple',5);
1.4 stredwic 299: $Str .= '</td><td align="center">';
1.30 matthew 300: my $only_seq_with_assessments = sub {
301: my $s=shift;
302: if ($s->{'num_assess'} < 1) {
303: return 0;
304: } else {
305: return 1;
306: }
307: };
308: $Str .= &Apache::lonstatistics::StudentDataSelect('StudentData','multiple',
309: 5,undef);
1.46 matthew 310: $Str .= '</td><td>'."\n";
311: $Str .= &Apache::lonhtmlcommon::StatusOptions(undef,undef,5);
1.4 stredwic 312: $Str .= '</td><td>'."\n";
1.30 matthew 313: $Str .= &Apache::lonstatistics::MapSelect('Maps','multiple,all',5,
314: $only_seq_with_assessments);
1.31 matthew 315: $Str .= '</td><td>'."\n";
316: $Str .= &CreateAndParseOutputSelector();
1.30 matthew 317: $Str .= '</td></tr>'."\n";
318: $Str .= '</table>'."\n";
1.4 stredwic 319: return $Str;
1.1 stredwic 320: }
1.30 matthew 321:
322: #######################################################
323: #######################################################
324:
325: =pod
326:
1.31 matthew 327: =item &CreateAndParseOutputSelector()
1.30 matthew 328:
329: =cut
330:
331: #######################################################
332: #######################################################
1.32 matthew 333: my @OutputOptions =
334: ({ name => 'HTML, with links',
335: value => 'html, with links',
1.33 matthew 336: description => 'Output HTML with each symbol linked to the problem '.
1.35 matthew 337: 'which generated it.',
338: mode => 'html',
339: show => 'all',
340: show_links => 'yes',
341: },
1.47 matthew 342: { name => 'HTML, with all links',
343: value => 'html, with all links',
344: description => 'Output HTML with each symbol linked to the problem '.
345: 'which generated it. '.
346: 'This includes links for unattempted problems.',
347: mode => 'html',
348: show => 'all',
349: show_links => 'all',
350: },
1.32 matthew 351: { name => 'HTML, without links',
352: value => 'html, without links',
1.33 matthew 353: description => 'Output HTML. By not including links, the size of the'.
354: ' web page is greatly reduced. If your browser crashes on the '.
1.35 matthew 355: 'full display, try this.',
356: mode => 'html',
357: show => 'all',
358: show_links => 'no',
359: },
1.33 matthew 360: { name => 'HTML, scores only',
361: value => 'html, scores only',
362: description => 'Output HTML, only showing the total number of correct'.
363: ' problems (or problem parts) and not the maximum possible for '.
1.35 matthew 364: 'each student',
365: mode => 'html',
366: show => 'scores',
367: show_links => 'no',
368: },
1.32 matthew 369: { name => 'HTML, totals',
370: value => 'html, totals',
1.33 matthew 371: description => 'Output HTML, but only the summary statistics for each'.
1.39 matthew 372: ' sequence selected for each student.',
1.35 matthew 373: mode => 'html',
374: show => 'totals',
375: show_links => 'no',
376: },
1.39 matthew 377: { name => 'HTML, summary table only',
378: value => 'html summary table only',
379: description => 'Output HTML, but only the final summary table for '.
380: 'all students across all sequences.',
381: mode => 'html',
382: show => 'final table',
383: show_links => 'no',
384: },
1.33 matthew 385: { name => 'Excel, scores only',
386: value => 'excel, scores only',
387: description => 'Output an Excel file (compatable with Excel 95), '.
388: 'with a single column for each sequence showing the students '.
1.35 matthew 389: 'score.',
390: mode => 'excel',
391: show => 'scores',
392: show_links => 'no',
393: },
1.32 matthew 394: { name => 'Excel, totals',
395: value => 'excel, totals',
1.33 matthew 396: description => 'Output an Excel file (compatable with Excel 95), '.
397: 'with two columns for each sequence, the students score on the '.
1.35 matthew 398: 'sequence and the students maximum possible on the sequence',
399: mode => 'excel',
400: show => 'totals',
401: show_links => 'no',
402: },
1.48 matthew 403: # { name => 'multi-sheet Excel',
404: # value => 'multi-sheet excel',
405: # description => 'Output an Excel file (compatable with Excel 95), '.
406: # 'with a seperate worksheet for each sequence you have selected '.
407: # 'the data for each problem part '.
408: # '(number of tries, status, points awarded) will be listed.',
409: # mode => 'multi-sheet excel',
410: # show => 'totals',
411: # show_links => 'no',
412: # },
413: # { name => 'multi-sheet Excel, by section',
414: # value => 'multi-sheet excel, by section',
415: # description => 'Output an Excel file (compatable with Excel 95), '.
416: # 'with a seperate worksheet for each sequence you have selected '.
417: # 'the data for each problem part '.
418: # '(number of tries, status, points awarded) will be listed. '.
419: # 'There will be one Excel workbook for each section selected.',
420: # mode => 'multi-sheet excel',
421: # show => 'by section',
422: # show_links => 'no',
423: # },
1.33 matthew 424: { name => 'CSV, everything',
425: value => 'csv, everything',
1.35 matthew 426: description => '',
427: mode => 'csv',
428: show => 'all',
429: show_links => 'no',
430: },
1.33 matthew 431: { name => 'CSV, scores only',
432: value => 'csv, scores only',
1.35 matthew 433: description => '',
434: mode => 'csv',
435: show => 'scores',
436: show_links => 'no',
437: },
1.32 matthew 438: { name => 'CSV, totals',
439: value => 'csv, totals',
1.35 matthew 440: description => '',
441: mode => 'csv',
442: show => 'totals',
443: show_links => 'no',
444: },
1.32 matthew 445: );
446:
1.33 matthew 447: sub OutputDescriptions {
448: my $Str = '';
449: $Str .= "<h2>Output Modes</h2>\n";
450: $Str .= "<dl>\n";
451: foreach my $outputmode (@OutputOptions) {
452: $Str .=" <dt>".$outputmode->{'name'}."</dt>\n";
453: $Str .=" <dd>".$outputmode->{'description'}."</dd>\n";
454: }
455: $Str .= "</dl>\n";
456: return $Str;
457: }
458:
1.31 matthew 459: sub CreateAndParseOutputSelector {
460: my $Str = '';
1.44 matthew 461: my $elementname = 'chartoutputmode';
1.31 matthew 462: #
463: # Format for output options is 'mode, restrictions';
1.50 ! matthew 464: my $selected = 'html, without links';
1.31 matthew 465: if (exists($ENV{'form.'.$elementname})) {
466: if (ref($ENV{'form.'.$elementname} eq 'ARRAY')) {
467: $selected = $ENV{'form.'.$elementname}->[0];
468: } else {
469: $selected = $ENV{'form.'.$elementname};
470: }
471: }
472: #
473: # Set package variables describing output mode
474: $show_links = 'no';
475: $output_mode = 'html';
476: $show = 'all';
1.35 matthew 477: foreach my $option (@OutputOptions) {
478: next if ($option->{'value'} ne $selected);
479: $output_mode = $option->{'mode'};
480: $show = $option->{'show'};
481: $show_links = $option->{'show_links'};
1.31 matthew 482: }
1.35 matthew 483:
1.31 matthew 484: #
485: # Build the form element
486: $Str = qq/<select size="5" name="$elementname">/;
1.32 matthew 487: foreach my $option (@OutputOptions) {
488: $Str .= "\n".' <option value="'.$option->{'value'}.'"';
489: $Str .= " selected " if ($option->{'value'} eq $selected);
490: $Str .= ">".$option->{'name'}."<\/option>";
1.31 matthew 491: }
492: $Str .= "\n</select>";
493: return $Str;
494: }
1.30 matthew 495:
1.28 matthew 496: #######################################################
497: #######################################################
1.1 stredwic 498:
1.28 matthew 499: =pod
500:
1.31 matthew 501: =head2 HTML output routines
1.28 matthew 502:
1.31 matthew 503: =item &html_initialize($r)
1.28 matthew 504:
1.31 matthew 505: Create labels for the columns of student data to show.
1.28 matthew 506:
1.31 matthew 507: =item &html_outputstudent($r,$student)
1.28 matthew 508:
1.31 matthew 509: Return a line of the chart for a student.
1.28 matthew 510:
1.31 matthew 511: =item &html_finish($r)
1.28 matthew 512:
513: =cut
514:
515: #######################################################
516: #######################################################
1.31 matthew 517: {
518: my $padding;
519: my $count;
520:
1.39 matthew 521: my $nodata_count; # The number of students for which there is no data
522: my %prog_state; # progress state used by loncommon PrgWin routines
523:
1.31 matthew 524: sub html_initialize {
525: my ($r) = @_;
1.30 matthew 526: #
527: $padding = ' 'x3;
1.35 matthew 528: $count = 0;
1.39 matthew 529: $nodata_count = 0;
1.30 matthew 530: #
1.38 matthew 531: $r->print("<h3>".$ENV{'course.'.$ENV{'request.course.id'}.'.description'}.
532: " ".localtime(time)."</h3>");
1.39 matthew 533:
534: #
535: # Set up progress window for 'final table' display only
536: if ($show eq 'final table') {
537: my $studentcount = scalar(@Apache::lonstatistics::Students);
538: %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
539: ($r,'Summary Table Status',
540: 'Summary Table Compilation Progress', $studentcount);
541: }
1.31 matthew 542: my $Str = "<pre>\n";
1.30 matthew 543: # First, the @StudentData fields need to be listed
1.31 matthew 544: my @to_show = &get_student_fields_to_show();
1.30 matthew 545: foreach my $field (@to_show) {
546: my $title=$Apache::lonstatistics::StudentData{$field}->{'title'};
547: my $base =$Apache::lonstatistics::StudentData{$field}->{'base_width'};
548: my $width=$Apache::lonstatistics::StudentData{$field}->{'width'};
549: $Str .= $title.' 'x($width-$base).$padding;
550: }
551: # Now the selected sequences need to be listed
1.40 matthew 552: foreach my $sequence (&Apache::lonstatistics::Sequences_with_Assess()){
1.31 matthew 553: my $title = $sequence->{'title'};
554: my $base = $sequence->{'base_width'};
555: my $width = $sequence->{'width'};
556: $Str .= $title.' 'x($width-$base).$padding;
1.30 matthew 557: }
1.31 matthew 558: $Str .= "total (of shown problems)</pre>\n";
559: $Str .= "<pre>";
1.39 matthew 560: #
561: # Check for suppression of output
562: if ($show eq 'final table') {
563: $Str = '';
564: }
1.31 matthew 565: $r->print($Str);
566: $r->rflush();
567: return;
1.30 matthew 568: }
569:
1.31 matthew 570: sub html_outputstudent {
571: my ($r,$student) = @_;
1.2 stredwic 572: my $Str = '';
1.35 matthew 573: #
574: if($count++ % 5 == 0 && $count > 0) {
575: $r->print("</pre><pre>");
576: }
1.30 matthew 577: # First, the @StudentData fields need to be listed
1.31 matthew 578: my @to_show = &get_student_fields_to_show();
1.30 matthew 579: foreach my $field (@to_show) {
580: my $title=$student->{$field};
1.31 matthew 581: my $base = length($title);
1.30 matthew 582: my $width=$Apache::lonstatistics::StudentData{$field}->{'width'};
583: $Str .= $title.' 'x($width-$base).$padding;
584: }
585: # Get ALL the students data
586: my %StudentsData;
587: my @tmp = &Apache::loncoursedata::get_current_state
588: ($student->{'username'},$student->{'domain'},undef,
589: $ENV{'request.course.id'});
590: if ((scalar @tmp > 0) && ($tmp[0] !~ /^error:/)) {
591: %StudentsData = @tmp;
592: }
593: if (scalar(@tmp) < 1) {
1.39 matthew 594: $nodata_count++;
595: return if ($show eq 'final table');
1.30 matthew 596: $Str .= '<font color="blue">No Course Data</font>'."\n";
1.31 matthew 597: $r->print($Str);
598: $r->rflush();
599: return;
1.30 matthew 600: }
601: #
602: # By sequence build up the data
603: my $studentstats;
1.31 matthew 604: my $PerformanceStr = '';
1.40 matthew 605: foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
1.31 matthew 606: my ($performance,$score,$seq_max) =
607: &StudentPerformanceOnSequence($student,\%StudentsData,
608: $seq,$show_links);
609: my $ratio = $score.'/'.$seq_max;
610: #
611: if ($show eq 'totals') {
612: $performance = ' 'x(length($seq_max)-length($score)).$ratio;
613: $performance .= ' 'x($seq->{'width'}-length($performance));
1.32 matthew 614: } elsif ($show eq 'scores') {
615: $performance = $score;
616: $performance .= ' 'x($seq->{'width'}-length($performance));
1.31 matthew 617: } else {
618: # Pad with extra spaces
619: $performance .= ' 'x($seq->{'width'}-$seq_max-
620: length($ratio)
621: ).$ratio;
1.30 matthew 622: }
1.31 matthew 623: #
624: $Str .= $performance.$padding;
625: #
626: $studentstats->{$seq->{'symb'}}->{'score'}= $score;
627: $studentstats->{$seq->{'symb'}}->{'max'} = $seq_max;
1.30 matthew 628: }
629: #
630: # Total it up and store the statistics info.
631: my ($score,$max) = (0,0);
632: while (my ($symb,$seq_stats) = each (%{$studentstats})) {
633: $Statistics->{$symb}->{'score'} += $seq_stats->{'score'};
634: $Statistics->{$symb}->{'max'} += $seq_stats->{'max'};
635: $score += $seq_stats->{'score'};
636: $max += $seq_stats->{'max'};
637: }
1.31 matthew 638: $Str .= ' '.' 'x(length($max)-length($score)).$score.'/'.$max;
1.30 matthew 639: $Str .= " \n";
1.39 matthew 640: #
641: # Check for suppressed output and update the progress window if so...
642: if ($show eq 'final table') {
643: $Str = '';
644: &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
645: 'last student');
646: }
647: #
1.31 matthew 648: $r->print($Str);
649: #
650: $r->rflush();
651: return;
1.30 matthew 652: }
1.2 stredwic 653:
1.31 matthew 654: sub html_finish {
655: my ($r) = @_;
1.39 matthew 656: #
657: # Check for suppressed output and close the progress window if so
658: if ($show eq 'final table') {
659: &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
660: } else {
661: $r->print("</pre>\n");
662: }
1.49 matthew 663: if ($single_student_mode) {
664: $r->print(&SingleStudentTotal());
665: } else {
666: $r->print(&StudentAverageTotal());
667: }
1.31 matthew 668: $r->rflush();
669: return;
670: }
671:
1.39 matthew 672: sub StudentAverageTotal {
673: my $Str = "<h3>Summary Tables</h3>\n";
674: my $num_students = scalar(@Apache::lonstatistics::Students);
675: my $total_ave = 0;
676: my $total_max = 0;
677: $Str .= '<table border=2 cellspacing="1">'."\n";
678: $Str .= "<tr><th>Title</th><th>Average</th><th>Maximum</th></tr>\n";
1.40 matthew 679: foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
1.42 matthew 680: my $ave;
681: if ($num_students > $nodata_count) {
682: $ave = int(100*($Statistics->{$seq->{'symb'}}->{'score'}/
683: ($num_students-$nodata_count)))/100;
684: } else {
685: $ave = 0;
686: }
1.39 matthew 687: $total_ave += $ave;
688: my $max = $seq->{'num_assess_parts'};
689: $total_max += $max;
690: if ($ave == 0) {
691: $ave = "0.00";
692: }
693: $ave .= ' ';
694: $max .= ' ';
695: $Str .= '<tr><td>'.$seq->{'title'}.'</td>'.
696: '<td align="right">'.$ave.'</td>'.
697: '<td align="right">'.$max.'</td></tr>'."\n";
698: }
699: $total_ave = int(100*$total_ave)/100; # only two digit
700: $Str .= "</table>\n";
701: $Str .= '<table border=2 cellspacing="1">'."\n";
702: $Str .= '<tr><th>Number of Students</th><th>Average</th>'.
703: "<th>Maximum</th></tr>\n";
704: $Str .= '<tr><td>'.($num_students-$nodata_count).'</td>'.
705: '<td>'.$total_ave.'</td><td>'.$total_max.'</td>';
706: $Str .= "</table>\n";
707: return $Str;
708: }
709:
1.49 matthew 710: sub SingleStudentTotal {
711: my $student = &Apache::lonstatistics::current_student();
712: my $Str = "<h3>Summary Table For ".$student->{'username'}.'@'.
713: $student->{'domain'}."</h3>\n";
714: $Str .= '<table border=2 cellspacing="1">'."\n";
715: $Str .=
716: "<tr><th>Sequence or Folder</th><th>Score</th><th>Maximum</th></tr>\n";
717: my $total = 0;
718: my $total_max = 0;
719: foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
720: my $value = $Statistics->{$seq->{'symb'}}->{'score'};
721: my $max = $Statistics->{$seq->{'symb'}}->{'max'};
722: $Str .= '<tr><td>'.$seq->{'title'}.'</td>'.
723: '<td align="right">'.$value.'</td>'.
724: '<td align="right">'.$max.'</td></tr>'."\n";
725: $total += $value;
726: $total_max +=$max;
727: }
728: $Str .= '<tr><td><b>Total</b></td>'.
729: '<td align="right">'.$total.'</td>'.
730: '<td align="right">'.$total_max."</td></tr>\n";
731: $Str .= "</table>\n";
732: return $Str;
733: }
734:
1.31 matthew 735: }
736:
1.35 matthew 737: #######################################################
738: #######################################################
739:
740: =pod
741:
742: =head2 Multi-Sheet EXCEL subroutines
743:
744: =item &multi_sheet_excel_initialize($r)
745:
746: =item &multi_sheet_excel_outputstudent($r,$student)
747:
748: =item &multi_sheet_excel_finish($r)
749:
750: =cut
751:
752: #######################################################
753: #######################################################
754: {
755:
756: sub multi_sheet_excel_initialize {
757: my ($r)=@_;
758: $r->print("<h1>Not yet implemented</h1>");
759: #
760: # Estimate the size of the file. We would like to have < 5 megs of data.
761: my $max_size = 5000000;
762: my $num_students = scalar(@Apache::lonstatistics::Students);
763: my $num_sequences = 0;
764: my $num_data_per_part = 2; # 'status' and 'numtries'
765: my $fields_per_student = scalar(&get_student_fields_to_show());
766: my $bytes_per_field = 20; # Back of the envelope calculation
1.40 matthew 767: foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
1.35 matthew 768: $num_sequences++ if ($seq->{'num_assess'} > 0);
769: $fields_per_student += $num_data_per_part * $seq->{'num_assess_parts'};
770: }
771: my $size_estimate = $fields_per_student*$num_students*$bytes_per_field;
772: #
773: # Compute number of workbooks
774: my $num_workbooks = 1;
775: if ($size_estimate > $max_size) { # try to stay under 5 megs
776: $num_workbooks += int($size_estimate / $max_size);
777: }
778: if ($show eq 'by section') {
779: if (@Apache::lonstatistics::SelectedSections > 1 &&
780: $Apache::lonstatistics::SelectedSections[0] ne 'all') {
781: $num_workbooks = scalar(@Apache::lonstatistics::SelectedSections);
782: } else {
783: # @Apache::lonstatistics::Sections contains 'all' as well.
784: $num_workbooks = scalar(@Apache::lonstatistics::Sections) - 1;
785: }
786: }
787:
788: $r->print("Maximum allowed size: ".$max_size." bytes<br />");
789: $r->print("Number of students: ".$num_students."<br />");
790: $r->print("Number of fields per student: ".$fields_per_student."<br />");
791: $r->print("Total number of fields: ".($fields_per_student*$num_students).
792: "<br />");
793: $r->print("Bytes per field: ".$bytes_per_field." (estimated)"."<br />");
794: $r->print("Estimated size: ".$size_estimate." bytes<br />");
795: $r->print("Number of workbooks: ".$num_workbooks."<br />");
796: $r->rflush();
797: return;
798: }
799:
800: sub multi_sheet_excel_outputstudent {
801: my ($r,$student) = @_;
802: }
803:
804: sub multi_sheet_excel_finish {
805: my ($r) = @_;
806: }
807:
808: }
1.31 matthew 809: #######################################################
810: #######################################################
811:
812: =pod
813:
814: =head2 EXCEL subroutines
815:
816: =item &excel_initialize($r)
817:
818: =item &excel_outputstudent($r,$student)
819:
820: =item &excel_finish($r)
821:
822: =cut
823:
824: #######################################################
825: #######################################################
826: {
827:
828: my $excel_sheet;
1.32 matthew 829: my $excel_workbook;
830:
831: my $filename;
832: my $rows_output;
833: my $cols_output;
834:
1.36 matthew 835: my %prog_state; # progress window state
1.31 matthew 836:
837: sub excel_initialize {
838: my ($r) = @_;
839: #
1.32 matthew 840: $filename = '/prtspool/'.
1.31 matthew 841: $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.
842: time.'_'.rand(1000000000).'.xls';
1.32 matthew 843: #
844: $excel_workbook = undef;
845: $excel_sheet = undef;
846: #
847: $rows_output = 0;
848: $cols_output = 0;
849: #
850: # Create sheet
851: $excel_workbook = Spreadsheet::WriteExcel->new('/home/httpd'.$filename);
852: #
853: # Check for errors
854: if (! defined($excel_workbook)) {
1.31 matthew 855: $r->log_error("Error creating excel spreadsheet $filename: $!");
856: $r->print("Problems creating new Excel file. ".
857: "This error has been logged. ".
858: "Please alert your LON-CAPA administrator");
1.32 matthew 859: return ;
1.31 matthew 860: }
861: #
862: # The excel spreadsheet stores temporary data in files, then put them
863: # together. If needed we should be able to disable this (memory only).
864: # The temporary directory must be specified before calling 'addworksheet'.
865: # File::Temp is used to determine the temporary directory.
1.32 matthew 866: $excel_workbook->set_tempdir($Apache::lonnet::tmpdir);
867: #
868: # Add a worksheet
1.33 matthew 869: my $sheetname = $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
870: if (length($sheetname) > 31) {
871: $sheetname = substr($sheetname,0,31);
872: }
873: $excel_sheet = $excel_workbook->addworksheet($sheetname);
1.32 matthew 874: #
1.34 matthew 875: # Put the course description in the header
876: $excel_sheet->write($rows_output,$cols_output++,
877: $ENV{'course.'.$ENV{'request.course.id'}.'.description'});
878: $cols_output += 3;
879: #
880: # Put a description of the sections listed
881: my $sectionstring = '';
882: my @Sections = @Apache::lonstatistics::SelectedSections;
883: if (scalar(@Sections) > 1) {
884: if (scalar(@Sections) > 2) {
885: my $last = pop(@Sections);
886: $sectionstring = "Sections ".join(', ',@Sections).', and '.$last;
887: } else {
888: $sectionstring = "Sections ".join(' and ',@Sections);
889: }
890: } else {
891: if ($Sections[0] eq 'all') {
892: $sectionstring = "All sections";
893: } else {
894: $sectionstring = "Section ".$Sections[0];
895: }
896: }
897: $excel_sheet->write($rows_output,$cols_output++,$sectionstring);
898: $cols_output += scalar(@Sections);
899: #
900: # Put the date in there too
901: $excel_sheet->write($rows_output,$cols_output++,
902: 'Compiled on '.localtime(time));
903: #
904: $rows_output++;
905: #
1.32 matthew 906: # Add the student headers
1.34 matthew 907: $cols_output = 0;
1.32 matthew 908: foreach my $field (&get_student_fields_to_show()) {
1.34 matthew 909: $excel_sheet->write($rows_output,$cols_output++,$field);
1.32 matthew 910: }
911: #
912: # Add the Sequence Headers
1.40 matthew 913: foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
1.34 matthew 914: $excel_sheet->write($rows_output,$cols_output,$seq->{'title'});
1.32 matthew 915: if ($show eq 'totals') {
1.34 matthew 916: $excel_sheet->write($rows_output+1,$cols_output,'score');
917: $excel_sheet->write($rows_output+1,$cols_output+1,'maximum');
1.32 matthew 918: $cols_output += 2;
919: } else {
920: $cols_output++;
921: }
922: }
923: #
924: # Bookkeeping
925: if ($show eq 'totals') {
1.34 matthew 926: $rows_output += 2;
1.32 matthew 927: } else {
1.34 matthew 928: $rows_output += 1;
1.45 matthew 929: }
930: #
931: # Output a row for MAX
932: if ($show ne 'totals') {
933: $cols_output = 0;
934: foreach my $field (&get_student_fields_to_show()) {
935: if ($field eq 'username' || $field eq 'fullname' ||
936: $field eq 'id') {
937: $excel_sheet->write($rows_output,$cols_output++,'Maximum');
938: } else {
939: $excel_sheet->write($rows_output,$cols_output++,'');
940: }
941: }
942: #
943: # Add the Sequence Headers
944: foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
945: $excel_sheet->write($rows_output,$cols_output++,
946: $seq->{'num_assess_parts'});
947: }
948: $rows_output++;
1.32 matthew 949: }
950: #
951: # Let the user know what we are doing
952: my $studentcount = scalar(@Apache::lonstatistics::Students);
953: $r->print("<h1>Compiling Excel spreadsheet for ".
954: $studentcount.' student');
955: $r->print('s') if ($studentcount > 1);
956: $r->print("</h1>\n");
957: $r->rflush();
1.31 matthew 958: #
1.36 matthew 959: # Initialize progress window
960: %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
961: ($r,'Excel File Compilation Status',
962: 'Excel File Compilation Progress', $studentcount);
963: #
1.31 matthew 964: return;
965: }
966:
967: sub excel_outputstudent {
968: my ($r,$student) = @_;
1.32 matthew 969: return if (! defined($excel_sheet));
970: $cols_output=0;
971: #
972: # Write out student data
973: my @to_show = &get_student_fields_to_show();
974: foreach my $field (@to_show) {
975: $excel_sheet->write($rows_output,$cols_output++,$student->{$field});
976: }
977: #
978: # Get student assessment data
979: my %StudentsData;
980: my @tmp = &Apache::loncoursedata::get_current_state($student->{'username'},
981: $student->{'domain'},
982: undef,
983: $ENV{'request.course.id'});
984: if ((scalar @tmp > 0) && ($tmp[0] !~ /^error:/)) {
985: %StudentsData = @tmp;
986: }
987: #
988: # Write out sequence scores and totals data
1.40 matthew 989: foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
1.32 matthew 990: my ($performance,$score,$seq_max) =
991: &StudentPerformanceOnSequence($student,\%StudentsData,
992: $seq,'no');
993: if ($show eq 'totals' || $show eq 'scores') {
994: $excel_sheet->write($rows_output,$cols_output++,$score);
995: }
996: if ($show eq 'totals') {
997: $excel_sheet->write($rows_output,$cols_output++,$seq_max);
998: }
999: }
1000: #
1001: # Bookkeeping
1002: $rows_output++;
1003: $cols_output=0;
1004: #
1.36 matthew 1005: # Update the progress window
1006: &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,'last student');
1.32 matthew 1007: return;
1.31 matthew 1008: }
1009:
1010: sub excel_finish {
1011: my ($r) = @_;
1.32 matthew 1012: return if (! defined($excel_sheet));
1013: #
1014: # Write the excel file
1015: $excel_workbook->close();
1016: my $c = $r->connection();
1017: #
1018: return if($c->aborted());
1019: #
1.36 matthew 1020: # Close the progress window
1021: &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
1022: #
1.32 matthew 1023: # Tell the user where to get their excel file
1.36 matthew 1024: $r->print('<br />'.
1.32 matthew 1025: '<a href="'.$filename.'">Your Excel spreadsheet.</a>'."\n");
1026: $r->rflush();
1027: return;
1.31 matthew 1028: }
1029:
1030: }
1.30 matthew 1031: #######################################################
1032: #######################################################
1033:
1034: =pod
1035:
1.31 matthew 1036: =head2 CSV output routines
1037:
1038: =item &csv_initialize($r)
1039:
1040: =item &csv_outputstudent($r,$student)
1041:
1042: =item &csv_finish($r)
1.30 matthew 1043:
1044: =cut
1045:
1046: #######################################################
1047: #######################################################
1.31 matthew 1048: {
1049:
1.37 matthew 1050: my $outputfile;
1051: my $filename;
1052:
1053: my %prog_state; # progress window state
1054:
1.31 matthew 1055: sub csv_initialize{
1056: my ($r) = @_;
1.37 matthew 1057: #
1058: # Clean up
1059: $filename = undef;
1060: $outputfile = undef;
1061: undef(%prog_state);
1062: #
1063: # Open a file
1064: $filename = '/prtspool/'.
1065: $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.
1066: time.'_'.rand(1000000000).'.csv';
1067: unless ($outputfile = Apache::File->new('>/home/httpd'.$filename)) {
1068: $r->log_error("Couldn't open $filename for output $!");
1069: $r->print("Problems occured in writing the csv file. ".
1070: "This error has been logged. ".
1071: "Please alert your LON-CAPA administrator.");
1072: $outputfile = undef;
1073: }
1.38 matthew 1074: #
1075: # Datestamp
1076: my $description = $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1077: print $outputfile '"'.&Apache::loncommon::csv_translate($description).'",'.
1078: '"'.&Apache::loncommon::csv_translate(scalar(localtime(time))).'"'.
1079: "\n";
1080:
1.37 matthew 1081: #
1082: # Print out the headings
1083: my $Str = '';
1084: my $Str2 = undef;
1085: foreach my $field (&get_student_fields_to_show()) {
1086: if ($show eq 'scores') {
1087: $Str .= '"'.&Apache::loncommon::csv_translate($field).'",';
1088: } elsif ($show eq 'totals') {
1089: $Str .= '"",'; # first row empty on the student fields
1090: $Str2 .= '"'.&Apache::loncommon::csv_translate($field).'",';
1091: } elsif ($show eq 'all') {
1092: $Str .= '"'.&Apache::loncommon::csv_translate($field).'",';
1093: }
1094: }
1.40 matthew 1095: foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
1.37 matthew 1096: if ($show eq 'scores') {
1097: $Str .= '"'.&Apache::loncommon::csv_translate($seq->{'title'}).
1098: '",';
1099: } elsif ($show eq 'totals') {
1100: $Str .= '"'.&Apache::loncommon::csv_translate($seq->{'title'}).
1101: '","",';
1102: $Str2 .= '"score","total possible",';
1103: } elsif ($show eq 'all') {
1104: $Str .= '"'.&Apache::loncommon::csv_translate($seq->{'title'}).
1105: '",';
1106: $Str .= '"",'x($seq->{'num_assess_parts'}-1);
1107: $Str .= '"score","total possible",';
1108: }
1109: }
1110: chop($Str);
1111: $Str .= "\n";
1112: print $outputfile $Str;
1113: if (defined($Str2)) {
1114: chop($Str2);
1115: $Str2 .= "\n";
1116: print $outputfile $Str2;
1117: }
1118: #
1119: # Initialize progress window
1120: my $studentcount = scalar(@Apache::lonstatistics::Students);
1121: %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
1122: ($r,'CSV File Compilation Status',
1123: 'CSV File Compilation Progress', $studentcount);
1.31 matthew 1124: return;
1125: }
1126:
1127: sub csv_outputstudent {
1128: my ($r,$student) = @_;
1.37 matthew 1129: return if (! defined($outputfile));
1130: my $Str = '';
1131: #
1132: # Output student fields
1133: my @to_show = &get_student_fields_to_show();
1134: foreach my $field (@to_show) {
1135: $Str .= '"'.&Apache::loncommon::csv_translate($student->{$field}).'",';
1136: }
1137: #
1138: # Get student assessment data
1139: my %StudentsData;
1140: my @tmp = &Apache::loncoursedata::get_current_state($student->{'username'},
1141: $student->{'domain'},
1142: undef,
1143: $ENV{'request.course.id'});
1144: if ((scalar @tmp > 0) && ($tmp[0] !~ /^error:/)) {
1145: %StudentsData = @tmp;
1146: }
1147: #
1148: # Output performance data
1.40 matthew 1149: foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
1.37 matthew 1150: my ($performance,$score,$seq_max) =
1151: &StudentPerformanceOnSequence($student,\%StudentsData,
1152: $seq,'no');
1153: if ($show eq 'scores') {
1154: $Str .= '"'.$score.'",';
1155: } elsif ($show eq 'totals') {
1156: $Str .= '"'.$score.'","'.$seq_max.'",';
1157: } elsif ($show eq 'all') {
1158: $Str .= '"'.join('","',(split(//,$performance),$score,$seq_max)).
1159: '",';
1160: }
1161: }
1162: chop($Str);
1163: $Str .= "\n";
1164: print $outputfile $Str;
1165: #
1166: # Update the progress window
1167: &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,'last student');
1168: return;
1.31 matthew 1169: }
1170:
1171: sub csv_finish {
1172: my ($r) = @_;
1.37 matthew 1173: return if (! defined($outputfile));
1174: close($outputfile);
1175: #
1176: my $c = $r->connection();
1177: return if ($c->aborted());
1178: #
1179: # Close the progress window
1180: &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
1181: #
1182: # Tell the user where to get their csv file
1183: $r->print('<br />'.
1184: '<a href="'.$filename.'">Your csv file.</a>'."\n");
1185: $r->rflush();
1186: return;
1187:
1.31 matthew 1188: }
1.2 stredwic 1189:
1190: }
1191:
1.28 matthew 1192: #######################################################
1193: #######################################################
1194:
1.2 stredwic 1195: =pod
1196:
1.30 matthew 1197: =item &StudentPerformanceOnSequence()
1.2 stredwic 1198:
1.30 matthew 1199: Inputs:
1.2 stredwic 1200:
1201: =over 4
1202:
1.30 matthew 1203: =item $student
1.28 matthew 1204:
1.30 matthew 1205: =item $studentdata Hash ref to all student data
1.2 stredwic 1206:
1.30 matthew 1207: =item $seq Hash ref, the sequence we are working on
1.2 stredwic 1208:
1.30 matthew 1209: =item $links if defined we will output links to each resource.
1.2 stredwic 1210:
1.28 matthew 1211: =back
1.2 stredwic 1212:
1213: =cut
1.1 stredwic 1214:
1.28 matthew 1215: #######################################################
1216: #######################################################
1.30 matthew 1217: sub StudentPerformanceOnSequence {
1.32 matthew 1218: my ($student,$studentdata,$seq,$links) = @_;
1.31 matthew 1219: $links = 'no' if (! defined($links));
1.1 stredwic 1220: my $Str = '';
1.30 matthew 1221: my ($sum,$max) = (0,0);
1222: foreach my $resource (@{$seq->{'contents'}}) {
1223: next if ($resource->{'type'} ne 'assessment');
1224: my $resource_data = $studentdata->{$resource->{'symb'}};
1225: my $value = '';
1226: foreach my $partnum (@{$resource->{'parts'}}) {
1227: $max++;
1228: my $symbol = ' '; # default to space
1229: #
1230: if (exists($resource_data->{'resource.'.$partnum.'.solved'})) {
1231: my $status = $resource_data->{'resource.'.$partnum.'.solved'};
1232: if ($status eq 'correct_by_override') {
1233: $symbol = '+';
1234: $sum++;
1235: } elsif ($status eq 'incorrect_by_override') {
1236: $symbol = '-';
1237: } elsif ($status eq 'ungraded_attempted') {
1238: $symbol = '#';
1239: } elsif ($status eq 'incorrect_attempted') {
1240: $symbol = '.';
1241: } elsif ($status eq 'excused') {
1242: $symbol = 'x';
1243: $max--;
1244: } elsif ($status eq 'correct_by_student' &&
1245: exists($resource_data->{'resource.'.$partnum.'.tries'})){
1246: my $num = $resource_data->{'resource.'.$partnum.'.tries'};
1247: if ($num > 9) {
1248: $symbol = '*';
1249: } elsif ($num > 0) {
1250: $symbol = $num;
1251: } else {
1252: $symbol = ' ';
1253: }
1254: $sum++;
1.43 matthew 1255: } elsif (exists($resource_data->{'resource.'.
1256: $partnum.'.tries'})){
1257: $symbol = '.';
1.30 matthew 1258: } else {
1259: $symbol = ' ';
1.2 stredwic 1260: }
1.30 matthew 1261: } else {
1262: # Unsolved. Did they try?
1263: if (exists($resource_data->{'resource.'.$partnum.'.tries'})){
1264: $symbol = '.';
1265: } else {
1266: $symbol = ' ';
1.18 matthew 1267: }
1.2 stredwic 1268: }
1.30 matthew 1269: #
1.47 matthew 1270: if ( ($links eq 'yes' && $symbol ne ' ') ||
1271: ($links eq 'all')) {
1.49 matthew 1272: if (length($symbol) > 1) {
1273: &Apache::lonnet::logthis('length of symbol "'.$symbol.'" > 1');
1274: }
1.30 matthew 1275: $symbol = '<a href="/adm/grades'.
1276: '?symb='.&Apache::lonnet::escape($resource->{'symb'}).
1277: '&student='.$student->{'username'}.
1278: '&domain='.$student->{'domain'}.
1279: '&command=submission">'.$symbol.'</a>';
1280: }
1281: $value .= $symbol;
1.2 stredwic 1282: }
1.30 matthew 1283: $Str .= $value;
1.17 minaeibi 1284: }
1.30 matthew 1285: return ($Str,$sum,$max);
1.1 stredwic 1286: }
1.23 minaeibi 1287:
1.28 matthew 1288: #######################################################
1289: #######################################################
1.23 minaeibi 1290:
1.2 stredwic 1291: =pod
1292:
1293: =item &CreateLegend()
1294:
1295: This function returns a formatted string containing the legend for the
1296: chart. The legend describes the symbols used to represent grades for
1297: problems.
1298:
1299: =cut
1300:
1.28 matthew 1301: #######################################################
1302: #######################################################
1.2 stredwic 1303: sub CreateLegend {
1304: my $Str = "<p><pre>".
1.13 minaeibi 1305: " 1 correct by student in 1 try\n".
1306: " 7 correct by student in 7 tries\n".
1.12 minaeibi 1307: " * correct by student in more than 9 tries\n".
1.20 minaeibi 1308: " + correct by hand grading or override\n".
1.12 minaeibi 1309: " - incorrect by override\n".
1310: " . incorrect attempted\n".
1311: " # ungraded attempted\n".
1.13 minaeibi 1312: " not attempted (blank field)\n".
1.12 minaeibi 1313: " x excused".
1.17 minaeibi 1314: "</pre><p>";
1.2 stredwic 1315: return $Str;
1316: }
1317:
1.28 matthew 1318: #######################################################
1319: #######################################################
1320:
1.30 matthew 1321: =pod
1.2 stredwic 1322:
1323: =back
1324:
1325: =cut
1326:
1.28 matthew 1327: #######################################################
1328: #######################################################
1.2 stredwic 1329:
1.28 matthew 1330: 1;
1.2 stredwic 1331:
1.1 stredwic 1332: __END__
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