Annotation of loncom/homework/default_homework.lcpm, revision 1.84
1.42 albertel 1: # The LearningOnline Network with CAPA
1.1 harris41 2: # used by lonxml::xmlparse() as input variable $safeinit to Apache::run::run()
1.42 albertel 3: #
1.82 albertel 4: # $Id: default_homework.lcpm,v 1.81 2004/05/18 23:12:15 albertel Exp $
1.42 albertel 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
1.20 harris41 28: #
1.76 albertel 29:
1.25 albertel 30: #init some globals
1.38 albertel 31: $hidden::RANDOMINIT=0;
1.22 ng 32: $pi=atan2(1,1)*4;
33: $rad2deg=180.0/$pi;
34: $deg2rad=$pi/180.0;
1.44 matthew 35: $"=' ';
1.3 albertel 36:
1.7 albertel 37: sub caparesponse_check {
1.74 albertel 38: my ($answer,$response)=@_;
1.73 albertel 39: #not properly used yet: calc
40: #not to be used: $ans_fmt
1.74 albertel 41: my $type=$LONCAPA::CAPAresponse_args{'type'};
42: my $tol=$LONCAPA::CAPAresponse_args{'tol'};
43: my $sig=$LONCAPA::CAPAresponse_args{'sig'};
44: my $ans_fmt=$LONCAPA::CAPAresponse_args{'ans_fmt'};
45: my $unit=$LONCAPA::CAPAresponse_args{'unit'};
46: my $calc=$LONCAPA::CAPAresponse_args{'calc'};
47: my $samples=$LONCAPA::CAPAresponse_args{'samples'};
1.73 albertel 48:
49: my $tol_type=''; # gets it's value from whether tol has a % or not done
50: my $sig_lbound=''; #done
51: my $sig_ubound=''; #done
52:
53:
54: #type's definitons come from capaParser.h
55: my $message='';
56: #remove leading and trailing whitespace
57: if (!defined($response)) {
58: $response='';
59: }
60: if ($response=~ /^\s|\s$/) {
61: $response=~ s:^\s+|\s+$::g;
62: $message .="Removed ws now :$response:\n";
63: } else {
64: $message .="no ws in :$response:\n";
65: }
1.76 albertel 66: if ($type eq 'cs' || $type eq 'ci' || $type eq 'mc') {
67: #for string answers make surec all places spaces occur, there is
68: #really only 1 space, in both the answer and the response
69: $answer=~s/ +/ /g;
70: $response=~s/ +/ /g;
71: }
1.83 albertel 72: if ($type eq 'float') { $response=~s/,//g; }
1.73 albertel 73: if (length($response) > 500) { return "TOO_LONG: Answer too long"; }
74:
75: if ($type eq '' ) {
1.74 albertel 76: $message .= "Didn't find a type :$type: defaulting\n";
1.73 albertel 77: if ( $answer eq ($answer *1.0)) { $type = 2;
78: } else { $type = 3; }
79: } else {
80: if ($type eq 'cs') { $type = 4; }
81: elsif ($type eq 'ci') { $type = 3 }
82: elsif ($type eq 'mc') { $type = 5; }
83: elsif ($type eq 'fml') { $type = 8; }
84: elsif ($type eq 'subj') { $type = 7; }
85: elsif ($type eq 'float') { $type = 2; }
86: elsif ($type eq 'int') { $type = 1; }
87: else { return "ERROR: Unknown type of answer: $type" }
88: }
89:
90: my $points;
91: my $id_list;
92: #formula type setup the sample points
93: if ($type eq '8') {
94: ($id_list,$points)=split(/@/,$samples);
95: $message.="Found :$id_list:$points: points in $samples\n";
96: }
97: if ($tol eq '') {
98: $tol=0.0;
99: $tol_type=1; #TOL_ABSOLUTE
100: } else {
101: if ($tol =~ /%$/) {
102: chop $tol;
103: $tol_type=2; #TOL_PERCENTAGE
104: } else {
105: $tol_type=1; #TOL_ABSOLUTE
106: }
107: }
108:
109: if ($sig eq '') {
110: $sig_lbound = 0; #SIG_LB_DEFAULT
111: $sig_ubound =15; #SIG_UB_DEFAULT
112: } else {
113: ($sig_lbound,$sig_ubound) = split /,/,$sig;
114: if (!defined($sig_lbound)) {
115: $sig_lbound = 0; #SIG_LB_DEFAULT
116: $sig_ubound =15; #SIG_UB_DEFAULT
117: }
118: if (!defined($sig_ubound)) { $sig_ubound=$sig_lbound; }
119: }
120: my $reterror="";
121: my $result = &caparesponse_capa_check_answer($response,$answer,$type,
122: $tol_type,$tol,
123: $sig_lbound,$sig_ubound,
124: $ans_fmt,$unit,$calc,$id_list,
125: $points,$external::randomseed,
126: \$reterror);
127:
128: if ($result == '1') { $result='EXACT_ANS'; }
129: elsif ($result == '2') { $result='APPROX_ANS'; }
130: elsif ($result == '3') { $result='SIG_FAIL'; }
131: elsif ($result == '4') { $result='UNIT_FAIL'; }
132: elsif ($result == '5') { $result='NO_UNIT'; }
133: elsif ($result == '6') { $result='UNIT_OK'; }
134: elsif ($result == '7') { $result='INCORRECT'; }
135: elsif ($result == '8') { $result='UNIT_NOTNEEDED'; }
136: elsif ($result == '9') { $result='ANS_CNT_NOT_MATCH'; }
137: elsif ($result =='10') { $result='SUB_RECORDED'; }
138: elsif ($result =='11') { $result='BAD_FORMULA'; }
1.77 albertel 139: elsif ($result =='13') { $result='UNIT_INVALID_INSTRUCTOR'; }
140: elsif ($result =='141') { $result='UNIT_INVALID_STUDENT'; }
141: elsif ($result =='142') { $result='UNIT_INVALID_STUDENT'; }
142: elsif ($result =='143') { $result='UNIT_INVALID_STUDENT'; }
143: elsif ($result =='15') { $result='UNIT_IRRECONCIBLE'; }
1.73 albertel 144: else {$result = "ERROR: Unknown Result:$result:$@:";}
145:
1.82 albertel 146: return ("$result:\nRetError $reterror:\nAnswer $answer:\nResponse $response:\n type-$type|$tol|$tol_type|$sig:$sig_lbound:$sig_ubound|$unit|\n$message",$reterror);
1.37 albertel 147: }
148:
1.73 albertel 149:
1.37 albertel 150: sub caparesponse_check_list {
1.74 albertel 151: my $response=$LONCAPA::CAPAresponse_args{'response'};
1.73 albertel 152: my ($result,@list);
1.74 albertel 153: @list=@LONCAPA::CAPAresponse_answer;
1.73 albertel 154: my $aresult='';
155: my $current_answer;
156: my $answers=join(':',@list);
157: $result.="Got response :$answers:\n";
1.74 albertel 158: &LONCAPA_INTERNAL_DEBUG("<blink>Yo!</blink> got ".join(':',%LONCAPA::CAPAresponse_args));
1.73 albertel 159: my @responselist;
1.74 albertel 160: my $type = $LONCAPA::CAPAresponse_args{'type'};
1.73 albertel 161: $result.="Got type :$type:\n";
162: if ($type ne '' && $#list > 0) {
163: (@responselist)=split /,/,$response;
164: } else {
165: (@responselist)=($response);
166: }
167: my $unit='';
168: $result.="Initial final response :$responselist['-1']:\n";
169: if ($type eq '' || $type eq 'float') {
170: #for numerical problems split off the unit
171: if ( $responselist['-1']=~ /(.*[^\s])\s+([^\s]+)/ ) {
172: $responselist['-1']=$1;
173: $unit=$2;
174: }
175: }
1.82 albertel 176: $result.="Final final response :$responselist['-1']:$unit:\n";
1.73 albertel 177: $result.=":$#list: answers\n";
178: $unit=~s/\s//;
179: my $i=0;
180: my $awards='';
181: my @msgs;
182: for ($i=0; $i<@list;$i++) {
183: my $msg;
184: $result.="trying answer :$list[$i]:\n";
185: my $thisanswer=$list[$i];
186: $result.="trying answer :$thisanswer:\n";
187: if ($unit eq '') {
1.74 albertel 188: ($aresult,$msg)=&caparesponse_check($thisanswer,$responselist[$i]);
1.73 albertel 189: } else {
190: ($aresult,$msg)=&caparesponse_check($thisanswer,
1.74 albertel 191: $responselist[$i]." $unit");
1.73 albertel 192: }
193: my ($temp)=split /:/, $aresult;
194: $awards.="$temp,";
195: $result.=$aresult;
196: push(@msgs,$msg);
197: }
198: chop $awards;
199: return ("$awards:\n$result",@msgs);
1.7 albertel 200: }
201:
1.4 albertel 202: sub tex {
1.73 albertel 203: if ( $external::target eq "tex" ) {
204: return $_[0];
205: } else {
206: return $_[1];
207: }
1.4 albertel 208: }
209:
1.24 ng 210: sub var_in_tex {
1.73 albertel 211: if ( $external::target eq "tex" ) {
212: return $_[0];
213: } else {
214: return "";
215: }
1.24 ng 216: }
217:
1.4 albertel 218: sub web {
1.73 albertel 219: if ( $external::target eq "tex" ) {
220: return $_[1];
1.26 ng 221: } else {
1.73 albertel 222: if ( $external::target eq "web" || $external::target eq "answer") {
223: return $_[2];
224: } else {
225: return $_[0];
226: }
1.4 albertel 227: }
228: }
229:
1.24 ng 230: sub html {
1.73 albertel 231: if ( $external::target eq "web" ) {
232: return shift;
233: }
1.24 ng 234: }
235:
1.1 harris41 236: sub hinton {
1.73 albertel 237: return 0;
1.1 harris41 238: }
239:
240: sub random {
1.61 albertel 241: my ($start,$end,$step)=@_;
242: if ( ! $hidden::RANDOMINIT ) {
243: if ($external::randomseed == 0) { $external::randomseed=1; }
244: if ($external::randomseed =~/,/) {
1.84 ! albertel 245: my ($num1,$num2)=split(/,/,$external::randomseed);
! 246: &random_set_seed(1,abs($num1));
! 247: } elsif ($external::randomseed =~/:/) {
! 248: my ($num1,$num2)=split(/:/,$external::randomseed);
1.61 albertel 249: &random_set_seed(abs($num1),abs($num2));
250: } else {
251: &random_set_seed(1,int(abs($external::randomseed)));
252: }
253: &math_random_uniform();
254: $hidden::RANDOMINIT=1;
255: }
256: if (!defined($step)) { $step=1; }
257: my $num=1+int(($end-$start)/$step);
258: my $result=$start + int(&math_random_uniform() * $num)*$step;
259: return $result;
1.1 harris41 260: }
261:
1.26 ng 262: sub random_normal {
1.73 albertel 263: my ($item_cnt,$seed,$av,$std_dev) = @_;
264: my @oldseed=&random_get_seed();
265: my @retArray;
266: &random_set_seed_from_phrase($seed);
267: @retArray=&math_random_normal($item_cnt,$av,$std_dev);
268: &random_set_seed(@oldseed);
269: return @retArray;
1.26 ng 270: }
271:
272: sub random_beta {
1.73 albertel 273: my ($item_cnt,$seed,$aa,$bb) = @_;
274: my @oldseed=&random_get_seed();
275: my @retArray;
276: &random_set_seed_from_phrase($seed);
277: @retArray=&math_random_beta($item_cnt,$aa,$bb);
278: &random_set_seed(@oldseed);
279: return @retArray;
1.26 ng 280: }
281:
282: sub random_gamma {
1.73 albertel 283: my ($item_cnt,$seed,$a,$r) = @_;
284: my @oldseed=&random_get_seed();
285: my @retArray;
286: &random_set_seed_from_phrase($seed);
287: @retArray=&math_random_gamma($item_cnt,$a,$r);
288: &random_set_seed(@oldseed);
289: return @retArray;
1.26 ng 290: }
291:
292: sub random_exponential {
1.73 albertel 293: my ($item_cnt,$seed,$av) = @_;
294: my @oldseed=&random_get_seed();
295: my @retArray;
296: &random_set_seed_from_phrase($seed);
297: @retArray=&math_random_exponential($item_cnt,$av);
298: &random_set_seed(@oldseed);
299: return @retArray;
1.26 ng 300: }
301:
302: sub random_poisson {
1.73 albertel 303: my ($item_cnt,$seed,$mu) = @_;
304: my @oldseed=&random_get_seed();
305: my @retArray;
306: &random_set_seed_from_phrase($seed);
307: @retArray=&math_random_poisson($item_cnt,$mu);
308: &random_set_seed(@oldseed);
309: return @retArray;
1.26 ng 310: }
311:
312: sub random_chi {
1.73 albertel 313: my ($item_cnt,$seed,$df) = @_;
314: my @oldseed=&random_get_seed();
315: my @retArray;
316: &random_set_seed_from_phrase($seed);
317: @retArray=&math_random_chi_square($item_cnt,$df);
318: &random_set_seed(@oldseed);
319: return @retArray;
1.26 ng 320: }
321:
322: sub random_noncentral_chi {
1.73 albertel 323: my ($item_cnt,$seed,$df,$nonc) = @_;
324: my @oldseed=&random_get_seed();
325: my @retArray;
326: &random_set_seed_from_phrase($seed);
327: @retArray=&math_random_noncentral_chi_square($item_cnt,$df,$nonc);
328: &random_set_seed(@oldseed);
329: return @retArray;
1.26 ng 330: }
331:
332: sub random_f {
1.73 albertel 333: my ($item_cnt,$seed,$dfn,$dfd) = @_;
334: my @oldseed=&random_get_seed();
335: my @retArray;
336: &random_set_seed_from_phrase($seed);
337: @retArray=&math_random_f($item_cnt,$dfn,$dfd);
338: &random_set_seed(@oldseed);
339: return @retArray;
1.26 ng 340: }
341:
342: sub random_noncentral_f {
1.73 albertel 343: my ($item_cnt,$seed,$dfn,$dfd,$nonc) = @_;
344: my @oldseed=&random_get_seed();
345: my @retArray;
346: &random_set_seed_from_phrase($seed);
347: @retArray=&math_random_noncentral_f($item_cnt,$dfn,$dfd,$nonc);
348: &random_set_seed(@oldseed);
349: return @retArray;
1.26 ng 350: }
351:
352: sub random_multivariate_normal {
1.73 albertel 353: my ($item_cnt,$seed,$mean,$covar) = @_;
354: my @oldseed=&random_get_seed();
355: &random_set_seed_from_phrase($seed);
356: @retArray=&math_random_multivariate_normal($item_cnt,@$mean,@$covar);
357: &random_set_seed(@oldseed);
358: return @retArray;
1.26 ng 359: }
360:
361: sub random_multinomial {
1.73 albertel 362: my ($item_cnt,$seed,@p) = @_;
363: my @oldseed=&random_get_seed();
364: my @retArray;
365: &random_set_seed_from_phrase($seed);
366: @retArray=&math_random_multinomial($item_cnt,@p);
367: &random_set_seed(@oldseed);
368: return @retArray;
1.26 ng 369: }
370:
371: sub random_permutation {
1.73 albertel 372: my ($seed,@inArray) = @_;
373: my @oldseed=&random_get_seed();
374: my @retArray;
375: &random_set_seed_from_phrase($seed);
376: @retArray=&math_random_permutation(@inArray);
377: &random_set_seed(@oldseed);
378: return @retArray;
1.26 ng 379: }
380:
381: sub random_uniform {
1.73 albertel 382: my ($item_cnt,$seed,$low,$high) = @_;
383: my @oldseed=&random_get_seed();
384: my @retArray;
385: &random_set_seed_from_phrase($seed);
386: @retArray=&math_random_uniform($item_cnt,$low,$high);
387: &random_set_seed(@oldseed);
388: return @retArray;
1.26 ng 389: }
390:
391: sub random_uniform_integer {
1.73 albertel 392: my ($item_cnt,$seed,$low,$high) = @_;
393: my @oldseed=&random_get_seed();
394: my @retArray;
395: &random_set_seed_from_phrase($seed);
396: @retArray=&math_random_uniform_integer($item_cnt,$low,$high);
397: &random_set_seed(@oldseed);
398: return @retArray;
1.26 ng 399: }
400:
401: sub random_binomial {
1.73 albertel 402: my ($item_cnt,$seed,$nt,$p) = @_;
403: my @oldseed=&random_get_seed();
404: my @retArray;
405: &random_set_seed_from_phrase($seed);
406: @retArray=&math_random_binomial($item_cnt,$nt,$p);
407: &random_set_seed(@oldseed);
408: return @retArray;
1.26 ng 409: }
410:
411: sub random_negative_binomial {
1.73 albertel 412: my ($item_cnt,$seed,$ne,$p) = @_;
413: my @oldseed=&random_get_seed();
414: my @retArray;
415: &random_set_seed_from_phrase($seed);
416: @retArray=&math_random_negative_binomial($item_cnt,$ne,$p);
417: &random_set_seed(@oldseed);
418: return @retArray;
1.26 ng 419: }
420:
1.23 ng 421: sub abs { abs(shift) }
422: sub sin { sin(shift) }
423: sub cos { cos(shift) }
424: sub exp { exp(shift) }
425: sub int { int(shift) }
426: sub log { log(shift) }
427: sub atan2 { atan2($_[0],$_[1]) }
428: sub sqrt { sqrt(shift) }
429:
1.59 albertel 430: sub tan { CORE::sin($_[0]) / CORE::cos($_[0]) }
1.21 harris41 431: #sub atan { atan2($_[0], 1); }
432: #sub acos { atan2(sqrt(1 - $_[0] * $_[0]), $_[0] ); }
433: #sub asin { atan2($_[0], sqrt(1- $_[0] * $_[0]) ); }
1.22 ng 434:
1.59 albertel 435: sub log10 { CORE::log($_[0])/CORE::log(10); }
1.22 ng 436:
1.20 harris41 437: sub factorial {
1.59 albertel 438: my $input = CORE::int(shift);
1.20 harris41 439: return "Error - unable to take factorial of an negative number ($input)" if $input < 0;
440: return "Error - factorial result is greater than system limit ($input)" if $input > 170;
441: return 1 if $input == 0;
442: my $result = 1;
443: for (my $i=2; $i<=$input; $i++) { $result *= $i }
444: return $result;
445: }
446:
447: sub sgn {
448: return -1 if $_[0] < 0;
449: return 0 if $_[0] == 0;
450: return 1 if $_[0] > 0;
451: }
452:
453: sub min {
454: my @sorted = sort { $a <=> $b || $a cmp $b } @_;
455: return shift @sorted;
456: }
457:
458: sub max {
459: my @sorted = sort { $a <=> $b || $a cmp $b } @_;
460: return pop @sorted;
461: }
1.1 harris41 462:
1.20 harris41 463: sub roundto {
464: my ($input,$n) = @_;
465: return sprintf('%.'.$n.'f',$input);
466: }
467:
468: sub to_string {
469: my ($input,$n) = @_;
1.26 ng 470: return sprintf($input) if $n eq "";
471: $n = '.'.$n if $n !~ /^\./;
1.20 harris41 472: return sprintf('%'.$n,$input) if $n ne "";
473: }
474:
475: sub sub_string {
476: my ($str,$start,$len) = @_;
477: return substr($str,$start-1,$len);
478: }
1.1 harris41 479:
480: sub pow {return $_[0] ** $_[1]; }
1.59 albertel 481: sub ceil {return (($_[0]-CORE::int($_[0]))== 0.0) ? $_[0] : (($_[0] > 0) ? (CORE::int($_[0])+ 1) : CORE::int($_[0])); }
482: sub floor {return (($_[0]-CORE::int($_[0]))== 0.0) ? $_[0] : (($_[0] > 0) ? CORE::int($_[0]) : (CORE::int($_[0])-1)); }
1.27 ng 483: #sub floor {return int($_[0]); }
1.1 harris41 484:
1.2 albertel 485: sub format {
1.73 albertel 486: my ($value,$fmt)=@_;
1.81 albertel 487: my ($dollarmode,$commamode,$alwaysperiod,$options);
488: if ($fmt =~ /^([^\d]*)(.*)/) { $options=$1; $fmt=$2; }
489: #if ($options =~ /\$/) { $dollamode=1; }
490: #if ($options =~ /,/) { $commamode=1; }
1.82 albertel 491: if ($options =~ /\./) { $alwaysperiod=1; }
1.73 albertel 492: $fmt=~s/e/E/g;
493: my $result=sprintf('%.'.$fmt,$value);
1.81 albertel 494: if ($alwaysperiod && $fmt eq '0f') { $result .='.'; }
1.73 albertel 495: $result=~s/(E[+-]*)0/$1/;
1.81 albertel 496: #if ($dollarmode) {$result=&dollarformat($result);}
497: #if ($commamode) {$result=&commaformat($result);}
1.73 albertel 498: return $result;
1.46 albertel 499: }
500:
1.75 albertel 501: sub chemparse {
502: my ($reaction) = @_;
503: my @tokens = split(/(\s\+|\->|<=>)/,$reaction);
504: my $formula = '';
505: foreach my $token (@tokens) {
506: if ($token eq '->' ) {
507: $formula .= '<m>\ensuremath{\rightarrow}</m> ';
508: next;
509: }
510: if ($token eq '<=>') {
511: if ($external::target eq 'web' &&
512: &EXT('request.browser.unicode')) {
1.76 albertel 513: $formula .= '⇌ ';
1.75 albertel 514: } else {
515: $formula .= &web('<=> ','<m>\ensuremath{\rightleftharpoons}</m> ',
516: '<=$gt; ');
517: }
518: next;
519: }
520: $token =~ /^\s*(\d*)(.*)/;
521: $formula .= $1 if ($1 > 1); # stoichiometric coefficient
522:
523: my $molecule = $2;
524: # subscripts
1.78 albertel 525: $molecule =~ s|(?<=[a-zA-Z\)\]\s])(\d+)|<sub>$1</sub>|g;
1.75 albertel 526: # superscripts
527: $molecule =~ s|\^(\d*[+\-]*)|<sup>$1</sup>|g;
528: # strip whitespace
529: $molecule =~ s/\s*//g;
530: # forced space
531: $molecule =~ s/_/ /g;
532: $formula .= $molecule.' ';
533: }
534: # get rid of trailing space
535: $formula =~ s/(\Q${nbsp}\E| )$//;
536:
537: return &xmlparse($formula);
538: }
539:
1.46 albertel 540: sub prettyprint {
1.73 albertel 541: my ($value,$fmt,$target)=@_;
542: my $result;
543: if (!$target) { $target = $external::target; }
1.75 albertel 544: if ($fmt =~ /chem/i) { return(&chemparse($value)); }
1.81 albertel 545: my ($dollarmode,$commamode,$alwaysperiod,$options);
546: if ($fmt =~ /^([^\d]*)(.*)/) { $options=$1; $fmt=$2; }
547: if ($options =~ /\$/) { $dollamode=1; }
548: if ($options =~ /,/) { $commamode=1; }
549: if ($options =~ /\./) { $alwaysperiod=1; }
1.73 albertel 550: if ($fmt) { $value=sprintf('%.'.$fmt,$value); }
1.81 albertel 551: if ($alwaysperiod && $fmt eq '0f') {
552: if ($target eq 'tex') {
553: $value .='\\ensuremath{.}';
554: } else {
555: $value .='.';
556: }
557: }
1.73 albertel 558: if ($value =~ /([0-9\.\-\+]+)E([0-9\-\+]+)/i ) {
559: my $frac=$1;
560: if ($dollarmode) { $frac=&dollarformat($frac); }
1.80 albertel 561: if ($commamode) { $frac=&commaformat($frac); }
1.73 albertel 562: my $exponent=$2;
563: $exponent=~s/^\+0*//;
564: $exponent=~s/^-0*/-/;
565: $exponent=~s/^-0*/-/;
566: if ($exponent eq '-') { undef($exponent); }
567: if ($exponent) {
568: if ($target eq 'web') {
569: $result=$frac.'×10<sup>'.$exponent.'</sup>';
570: } elsif ($target eq 'tex') {
571: $result='\ensuremath{'.$frac.'\times 10^{'.$exponent.'}}';
572: } else {
573: $result=$value;
574: }
575: } else {
576: $result=$frac;
577: }
578: } else {
1.48 albertel 579: $result=$value;
1.73 albertel 580: if ($dollarmode) { $result=&dollarformat($result,$target); }
1.80 albertel 581: if ($commamode) { $result=&commaformat($result,$target); }
1.46 albertel 582: }
1.73 albertel 583: return $result;
1.48 albertel 584: }
585:
1.80 albertel 586: sub commaformat {
1.73 albertel 587: my ($number,$target) = @_;
588: if ($number =~ /\./) {
589: while ($number =~ /([^\.,]+)([^\.,][^\.,][^\.,])([,0-9]*\.[0-9]*)$/) {
590: $number = $1.','.$2.$3;
591: }
592: } else {
593: while ($number =~ /([^,]+)([^,][^,][^,])([,0-9]*)$/) {
594: $number = $1.','.$2.$3;
595: }
596: }
1.80 albertel 597: return $number;
598: }
599:
600: sub dollarformat {
601: my ($number,$target) = @_;
602: if (!$target) { $target = $external::target; }
603: $number=&commaformat($number,$target);
1.73 albertel 604: if ($target eq 'tex') {
605: $number='\$'.$number; #' stupid emacs
606: } else {
607: $number='$'.$number; #' stupid emacs
608: }
609: return $number;
1.2 albertel 610: }
1.5 albertel 611:
612: sub map {
1.27 ng 613: my ($phrase,$dest,$source)=@_;
1.51 albertel 614: my @oldseed=&random_get_seed();
1.27 ng 615: my @seed = &random_seed_from_phrase($phrase);
616: &random_set_seed(@seed);
617: my $destct = scalar(@$dest);
1.28 ng 618: if (!$source) {
619: my @output;
620: my @idx = &math_random_permuted_index($destct);
621: my $ctr = 0;
622: while ($ctr < $destct) {
623: $output[$ctr] = $$dest[$idx[$ctr]];
1.27 ng 624: $ctr++;
1.28 ng 625: }
1.51 albertel 626: &random_set_seed(@oldseed);
1.28 ng 627: return @output;
1.27 ng 628: } else {
1.28 ng 629: my $num = scalar(@$source);
630: my @idx = &math_random_permuted_index($num);
631: my $ctr = 0;
632: my $tot = $num;
633: $tot = $destct if $destct < $num;
634: if (ref($$dest[0])) {
635: while ($ctr < $tot) {
636: ${$$dest[$ctr]} = $$source[$idx[$ctr]];
637: $ctr++;
638: }
639: } else {
640: while ($ctr < $tot) {
641: $$dest[$ctr] = $$source[$idx[$ctr]];
642: $ctr++;
643: }
644: }
1.27 ng 645: }
1.56 albertel 646: &random_set_seed(@oldseed);
1.51 albertel 647: return '';
1.27 ng 648: }
649:
650: sub rmap {
651: my ($phrase,$dest,$source)=@_;
1.51 albertel 652: my @oldseed=&random_get_seed();
1.27 ng 653: my @seed = &random_seed_from_phrase($phrase);
654: &random_set_seed(@seed);
655: my $destct = scalar(@$dest);
1.28 ng 656: if (!$source) {
657: my @idx = &math_random_permuted_index($destct);
658: my $ctr = 0;
659: my @r_idx;
660: while ($ctr < $destct) {
661: $r_idx[$idx[$ctr]] = $ctr;
662: $ctr++;
663: }
664: my @output;
665: $ctr = 0;
666: while ($ctr < $destct) {
667: $output[$ctr] = $$dest[$r_idx[$ctr]];
1.27 ng 668: $ctr++;
1.28 ng 669: }
1.51 albertel 670: &random_set_seed(@oldseed);
1.28 ng 671: return @output;
1.27 ng 672: } else {
1.28 ng 673: my $num = scalar(@$source);
674: my @idx = &math_random_permuted_index($num);
675: my $ctr = 0;
676: my $tot = $num;
677: $tot = $destct if $destct < $num;
678: my @r_idx;
1.27 ng 679: while ($ctr < $tot) {
1.28 ng 680: $r_idx[$idx[$ctr]] = $ctr;
1.27 ng 681: $ctr++;
1.28 ng 682: }
683: $ctr = 0;
684: if (ref($$dest[0])) {
685: while ($ctr < $tot) {
686: ${$$dest[$ctr]} = $$source[$r_idx[$ctr]];
687: $ctr++;
688: }
689: } else {
690: while ($ctr < $tot) {
691: $$dest[$ctr] = $$source[$r_idx[$ctr]];
692: $ctr++;
693: }
694: }
1.6 albertel 695: }
1.51 albertel 696: &random_set_seed(@oldseed);
697: return '';
1.5 albertel 698: }
1.22 ng 699:
1.23 ng 700: sub capa_id { return }
701:
702: sub problem { return }
703:
1.22 ng 704: sub name{
1.73 albertel 705: my $fullname = &EXT('environment.lastname').', '.&EXT('environment.firstname').' '.&EXT('environment.middlename');
706: $fullname = "" if $fullname eq ", ";
707: $fullname =~ s/\%2d/-/g;
708: return $fullname;
1.22 ng 709: }
710:
711: sub student_number {
1.73 albertel 712: my $id = &EXT('environment.id');
713: $id = '' if $id eq "";
714: return $id;
1.22 ng 715: }
716:
717: sub class {
1.73 albertel 718: my $course = &EXT('course.description');
719: $course = '' if $course eq "";
720: return $course;
1.22 ng 721: }
722:
723: sub sec {
1.73 albertel 724: my $sec = &EXT('request.course.sec');
725: $sec = '' if $sec eq "";
726: return $sec;
1.22 ng 727: }
728:
1.23 ng 729: sub open_date {
1.73 albertel 730: my @dc = split(/\s+/,localtime(&EXT('resource.0.opendate')));
731: return '' if ($dc[0] eq "Wed" and $dc[2] == 31 and $dc[4] == 1969);
732: my @hm = split(/:/,$dc[3]);
733: my $ampm = " am";
734: if ($hm[0] > 12) {
735: $hm[0]-=12;
736: $ampm = " pm";
737: }
738: return $dc[0].', '.$dc[1].' '.$dc[2].', '.$dc[4].' at '.$hm[0].':'.$hm[1].$ampm;
1.23 ng 739: }
740:
741: sub due_date {
1.73 albertel 742: my @dc = split(/\s+/,localtime(&EXT('resource.0.duedate')));
743: return '' if ($dc[0] eq "Wed" and $dc[2] == 31 and $dc[4] == 1969);
744: my @hm = split(/:/,$dc[3]);
745: my $ampm = " am";
746: if ($hm[0] > 12) {
747: $hm[0]-=12;
748: $ampm = " pm";
749: }
750: return $dc[0].', '.$dc[1].' '.$dc[2].', '.$dc[4].' at '.$hm[0].':'.$hm[1].$ampm;
1.23 ng 751: }
752:
753: sub answer_date {
1.73 albertel 754: my @dc = split(/\s+/,localtime(&EXT('resource.0.answerdate')));
755: return '' if ($dc[0] eq "Wed" and $dc[2] == 31 and $dc[4] == 1969);
756: my @hm = split(/:/,$dc[3]);
757: my $ampm = " am";
758: if ($hm[0] > 12) {
759: $hm[0]-=12;
760: $ampm = " pm";
761: }
762: return $dc[0].', '.$dc[1].' '.$dc[2].', '.$dc[4].' at '.$hm[0].':'.$hm[1].$ampm;
1.24 ng 763: }
764:
765: sub array_moments {
1.73 albertel 766: my @input=@_;
767: my (@output,$N);
768: $N=scalar (@input);
769: $output[0]=$N;
770: if ($N <= 1) {
771: $output[1]=$input[0];
772: $output[1]="Input array not defined" if ($N == 0);
773: $output[2]="variance undefined for N<=1";
774: $output[3]="skewness undefined for N<=1";
775: $output[4]="kurtosis undefined for N<=1";
776: return @output;
777: }
778: my $sum=0;
779: foreach my $line (@input) {
780: $sum+=$line;
781: }
782: $output[1] = $sum/$N;
783: my ($x,$sdev,$var,$skew,$kurt) = 0;
784: foreach my $line (@input) {
785: $x=$line-$output[1];
786: $var+=$x**2;
787: $skew+=$x**3;
788: $kurt+=$x**4;
789: }
790: $output[2]=$var/($N-1);
791: $sdev=CORE::sqrt($output[2]);
792: if ($sdev == 0) {
793: $output[3]="inf-variance=0";
794: $output[4]="inf-variance=0";
795: return @output;
796: }
797: $output[3]=$skew/($sdev**3*$N);
798: $output[4]=$kurt/($sdev**4*$N)-3;
1.24 ng 799: return @output;
800: }
1.5 albertel 801:
802: sub choose {
1.73 albertel 803: my $num = $_[0];
804: return $_[$num];
1.5 albertel 805: }
1.23 ng 806:
1.49 albertel 807: # expiremental idea
808: sub proper_path {
1.73 albertel 809: my ($path)=@_;
810: if ( $external::target eq "tex" ) {
811: return '/home/httpd/html'.$path;
812: } else {
813: return $path;
814: }
1.49 albertel 815: }
1.23 ng 816:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to default_homework.lcpm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / homework