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version 1.13, 2000/12/12 14:54:10
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version 1.149, 2010/10/14 19:54:56
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| # file name (temp): default_homework |
# The LearningOnline Network with CAPA |
| # used by lonxml::xmlparse() as input variable $safeinit to Apache::run::run() |
# used by lonxml::xmlparse() as input variable $safeinit to Apache::run::run() |
| # |
|
| # |
# |
| $RANDOMINIT=0; |
# $Id$ |
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# |
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# Copyright Michigan State University Board of Trustees |
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# |
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# This file is part of the LearningOnline Network with CAPA (LON-CAPA). |
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# |
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# LON-CAPA is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 2 of the License, or |
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# (at your option) any later version. |
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# |
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# LON-CAPA is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with LON-CAPA; if not, write to the Free Software |
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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# |
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# /home/httpd/html/adm/gpl.txt |
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# |
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# http://www.lon-capa.org/ |
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# |
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# |
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|
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#init some globals |
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$hidden::RANDOMINIT=0; |
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$pi=atan2(1,1)*4; |
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$rad2deg=180.0/$pi; |
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$deg2rad=$pi/180.0; |
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$"=' '; |
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use strict; |
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{ |
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my $n = 0; |
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my $total = 0; |
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my $num_left = 0; |
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my @order; |
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my $type; |
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|
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sub init_permutation { |
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my ($size,$requested_type) = @_; |
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@order = (0..$size-1); |
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$n = $size; |
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$type = $requested_type; |
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if ($type eq 'ordered') { |
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$total = $num_left = 1; |
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} elsif ($type eq 'unordered') { |
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$total = $num_left = &factorial($size); |
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} else { |
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die("Unkown type: $type"); |
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} |
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} |
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|
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sub get_next_permutation { |
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if ($num_left == $total) { |
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$num_left--; |
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return \@order; |
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} |
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|
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# Find largest index j with a[j] < a[j+1] |
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|
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my $j = scalar(@order) - 2; |
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while ($order[$j] > $order[$j+1]) { |
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$j--; |
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} |
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|
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# Find index k such that a[k] is smallest integer |
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# greater than a[j] to the right of a[j] |
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|
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my $k = scalar(@order) - 1; |
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while ($order[$j] > $order[$k]) { |
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$k--; |
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} |
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|
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# Interchange a[j] and a[k] |
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|
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@order[($k,$j)] = @order[($j,$k)]; |
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|
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# Put tail end of permutation after jth position in increasing order |
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|
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my $r = scalar(@order) - 1; |
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my $s = $j + 1; |
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|
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while ($r > $s) { |
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@order[($s,$r)]=@order[($r,$s)]; |
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$r--; |
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$s++; |
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} |
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|
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$num_left--; |
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return(\@order); |
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} |
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|
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sub get_permutations_left { |
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return $num_left; |
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} |
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} |
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|
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sub check_commas { |
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my ($response)=@_; |
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#print("$response "); |
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my @numbers=split(',',$response); |
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#print(" numbers ".join('-',@numbers)." "); |
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if (scalar(@numbers) > 1) { |
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#print(" numbers[0] ".$numbers[0]." "); |
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if (length($numbers[0]) > 3 || length($numbers[0]) == 0) { return -1; } |
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shift(@numbers); |
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#print(" numbers ".scalar(@numbers)." "); |
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while (scalar(@numbers) > 1) { |
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#print(" numbers ".join('-',@numbers)." "); |
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if (length($numbers[0]) != 3) { return -2; } |
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shift(@numbers); |
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} |
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my ($number)=split('\.',$numbers[0]); |
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#print(" number ".$number." "); |
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#print(" numbers[0] ".$numbers[0]." "); |
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if (length($number) != 3) { return -3; } |
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} else { |
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my ($number)=split('\.',$numbers[0]); |
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if (length($number) > 3) { return -4; } |
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} |
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return 1; |
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} |
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|
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|
| sub caparesponse_check { |
sub caparesponse_check { |
| my $answer=''; #done |
my ($answer,$response)=@_; |
| my $type=''; #done |
#not properly used yet: calc |
| my $tol_type=''; # gets it's value from whether tol has a % or not done |
#not to be used: $ans_fmt |
| my $tol=''; #done |
my $type=$LONCAPA::CAPAresponse_args{'type'}; |
| my $sig=''; |
my $tol=$LONCAPA::CAPAresponse_args{'tol'}; |
| my $sig_lbound=''; |
my $sig=$LONCAPA::CAPAresponse_args{'sig'}; |
| my $sig_ubound=''; |
my $ans_fmt=$LONCAPA::CAPAresponse_args{'format'}; |
| my $ans_fmt=''; |
my $unit=$LONCAPA::CAPAresponse_args{'unit'}; |
| my $units=''; |
my $calc=$LONCAPA::CAPAresponse_args{'calc'}; |
| my $calc=''; |
my $samples=$LONCAPA::CAPAresponse_args{'samples'}; |
| my ($response,$expr)=@_; |
|
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my $tol_type=''; # gets it's value from whether tol has a % or not done |
| ($answer,$type,$tol,$sig,$ans_fmt, |
my $sig_lbound=''; #done |
| $units,$calc) = eval $expr.';return $answer,$type,$tol,$sig,$ans_fmt,$units,$calc'; |
my $sig_ubound=''; #done |
| #type's definitons come from capaParser.h |
|
| if ($type eq '' ) { |
|
| if ( $answer eq ($answer *1.0)) { $type = 2; |
#type's definitons come from capaParser.h |
| } else { $type = 3; } |
|
| } else { |
#remove leading and trailing whitespace |
| if ($type eq 'cs') { $type = 4; |
if (!defined($response)) { |
| } elsif ($type eq 'ci') { $type = 3; |
$response=''; |
| } elsif ($type eq 'mc') { $type = 5; |
} |
| } elsif ($type eq 'fml') { $type = 8; |
if ($response=~ /^\s|\s$/) { |
| } elsif ($type eq 'subj') { $type = 7; |
$response=~ s:^\s+|\s+$::g; |
| } else { return "ERROR: Unknown type of answer: $type" } |
&LONCAPA_INTERNAL_DEBUG("Removed ws now :$response:"); |
| } |
} |
| |
|
| if ($tol eq '') { |
#&LONCAPA_INTERNAL_DEBUG(" type is $type "); |
| $tol=0.0; |
if ($type eq 'cs' || $type eq 'ci') { |
| $tol_type=1; #TOL_ABSOLUTE |
#for string answers make sure all places spaces occur, there is |
| } else { |
#really only 1 space, in both the answer and the response |
| if ($tol =~ /%$/) { |
$answer=~s/ +/ /g; |
| chop $tol; |
$response=~s/ +/ /g; |
| $tol_type=2; #TOL_PERCENTAGE |
} elsif ($type eq 'mc') { |
| } else { |
$answer=~s/[\s,]//g; |
| $tol_type=1; #TOL_ABSOLUTE |
$response=~s/[\s,]//g; |
| } |
} |
| } |
if ($type eq 'float' && $unit=~/\$/) { |
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if ($response!~/^\$|\$$/) { return ('NO_UNIT', undef); } |
| if ($sig eq '') { |
$response=~s/\$//g; |
| $sig_lbound = 0; #SIG_LB_DEFAULT |
} |
| $sig_ubound =15; #SIG_UB_DEFAULT |
if ($type eq 'float' && $unit=~/\,/ && (&check_commas($response)<0)) { |
| } else { |
return "COMMA_FAIL:"; |
| ($sig_lbound,$sig_ubound) = split /,/,$sig; |
} |
| } |
$ans_fmt=~s/\W//g; |
| my $result = &caparesponse_capa_check_answer($response,$answer,$type, |
$unit=~s/[\$,]//g; |
| $tol_type,$tol, |
if ($type eq 'float') { $response=~s/,//g; } |
| $sig_lbound,$sig_ubound, |
|
| $ans_fmt,$units,$calc); |
if (length($response) > 500) { return ('TOO_LONG',undef); } |
| |
|
| if ($result == '1') { $result='EXACT_ANS'; } |
if ($type eq '' ) { |
| elsif ($result == '2') { $result='APPROX_ANS'; } |
&LONCAPA_INTERNAL_DEBUG("Didn't find a type :$type: defaulting"); |
| elsif ($result == '3') { $result='SIG_FAIL'; } |
if ( $answer eq ($answer *1.0)) { $type = 2; |
| elsif ($result == '4') { $result='UNIT_FAIL'; } |
} else { $type = 3; } |
| elsif ($result == '5') { $result='NO_UNIT'; } |
} else { |
| elsif ($result == '6') { $result='UNIT_OK'; } |
if ($type eq 'cs') { $type = 4; } |
| elsif ($result == '7') { $result='INCORRECT'; } |
elsif ($type eq 'ci') { $type = 3 } |
| elsif ($result == '8') { $result='UNIT_NOTNEEDED'; } |
elsif ($type eq 'mc') { $type = 5; } |
| elsif ($result == '9') { $result='ANS_CNT_NOT_MATCH'; } |
elsif ($type eq 'fml') { $type = 8; } |
| elsif ($result =='10') { $result='SUB_RECORDED'; } |
elsif ($type eq 'math') { $type = 9; } |
| elsif ($result =='11') { $result='BAD_FORMULA'; } |
elsif ($type eq 'subj') { $type = 7; } |
| elsif ($result =='12') { $result='WANTED_NUMERIC'; } |
elsif ($type eq 'float') { $type = 2; } |
| else {$result = "ERROR: Unknown Result:$result:$@:";} |
elsif ($type eq 'int') { $type = 1; } |
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else { return ('ERROR', "Unknown type of answer: $type") } |
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} |
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|
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my $points; |
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my $id_list; |
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#formula type setup the sample points |
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if ($type eq '8') { |
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($id_list,$points)=split(/@/,$samples); |
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&LONCAPA_INTERNAL_DEBUG("Found :$id_list:$points: points in $samples"); |
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} |
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if ($tol eq '') { |
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$tol=0.0; |
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$tol_type=1; #TOL_ABSOLUTE |
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} else { |
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if ($tol =~ /%$/) { |
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chop $tol; |
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$tol_type=2; #TOL_PERCENTAGE |
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} else { |
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$tol_type=1; #TOL_ABSOLUTE |
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} |
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} |
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|
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($sig_ubound,$sig_lbound)=&LONCAPA_INTERNAL_get_sigrange($sig); |
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|
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my $reterror=""; |
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my $result; |
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if (($type eq '9') || ($type eq '8')) { |
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if ($response=~/\=/) { |
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return ('BAD_FORMULA','Please submit just an expression, not an equation.'); |
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} elsif ($response =~ /\,/ and $response !~ /^\s*\{.*\}\s*$/) { |
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return ('BAD_FORMULA'); |
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} |
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} |
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if ($type eq '9') { |
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$result = &maxima_check(&maxima_cas_formula_fix($response),&maxima_cas_formula_fix($answer),\$reterror); |
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} else { |
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if ($type eq '8') { # fml type |
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$response = &capa_formula_fix($response); |
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$answer = &capa_formula_fix($answer); |
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} |
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$result = &caparesponse_capa_check_answer($response,$answer,$type, |
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$tol_type,$tol, |
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$sig_lbound,$sig_ubound, |
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$ans_fmt,$unit,$calc,$id_list, |
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$points,$external::randomseed, |
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\$reterror); |
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} |
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if ($result == '1') { $result='EXACT_ANS'; } |
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elsif ($result == '2') { $result='APPROX_ANS'; } |
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elsif ($result == '3') { $result='SIG_FAIL'; } |
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elsif ($result == '4') { $result='UNIT_FAIL'; } |
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elsif ($result == '5') { $result='NO_UNIT'; } |
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elsif ($result == '6') { $result='UNIT_OK'; } |
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elsif ($result == '7') { $result='INCORRECT'; } |
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elsif ($result == '8') { $result='UNIT_NOTNEEDED'; } |
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elsif ($result == '9') { $result='ANS_CNT_NOT_MATCH'; } |
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elsif ($result =='10') { $result='SUB_RECORDED'; } |
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elsif ($result =='11') { $result='BAD_FORMULA'; } |
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elsif ($result =='12' && !$response) { $result='MISSING_ANSWER'; } |
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elsif ($result =='12') { $result='WANTED_NUMERIC'; } |
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elsif ($result =='13') { $result='UNIT_INVALID_INSTRUCTOR'; } |
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elsif ($result =='141') { $result='UNIT_INVALID_STUDENT'; } |
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elsif ($result =='142') { $result='UNIT_INVALID_STUDENT'; } |
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elsif ($result =='143') { $result='UNIT_INVALID_STUDENT'; } |
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elsif ($result =='15') { $result='UNIT_IRRECONCIBLE'; } |
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else {$result = "ERROR: Unknown Result:$result:$@:";} |
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|
| return "$result:$error:$answer:$type|$tol|$tol_type|$sig:$sig_lbound:$sig_ubound|$units"; |
&LONCAPA_INTERNAL_DEBUG("RetError $reterror: Answer $answer: Response $response: type-$type|$tol|$tol_type|$sig:$sig_lbound:$sig_ubound|$unit|"); |
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&LONCAPA_INTERNAL_DEBUG(" $answer $response $result "); |
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return ($result,$reterror); |
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} |
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|
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|
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sub caparesponse_check_list { |
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my $responses=$LONCAPA::CAPAresponse_args{'response'}; |
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&LONCAPA_INTERNAL_DEBUG("args ".join(':',%LONCAPA::CAPAresponse_args)); |
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my $type = $LONCAPA::CAPAresponse_args{'type'}; |
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my $answerunit=$LONCAPA::CAPAresponse_args{'unit'}; |
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&LONCAPA_INTERNAL_DEBUG("Got type :$type: answer unit :$answerunit:\n"); |
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|
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my $num_input_lines = |
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scalar(@{$LONCAPA::CAPAresponse_answer->{'answers'}}); |
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|
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if ($type ne '' ) { |
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if (scalar(@$responses) < $num_input_lines) { |
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return 'MISSING_ANSWER'; |
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} |
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if (scalar(@$responses) > $num_input_lines) { |
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return 'EXTRA_ANSWER'; |
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} |
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|
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} |
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|
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foreach my $which (0..($num_input_lines-1)) { |
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my $answer_size = |
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scalar(@{$LONCAPA::CAPAresponse_answer->{'answers'}[$which]}); |
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if ($type ne '' |
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&& $answer_size > 1) { |
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$responses->[$which]=[split(/,/,$responses->[$which])]; |
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} else { |
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$responses->[$which]=[$responses->[$which]]; |
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} |
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} |
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foreach my $which (0..($num_input_lines-1)) { |
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my $answer_size = |
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scalar(@{$LONCAPA::CAPAresponse_answer->{'answers'}[$which]}); |
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my $response_size = |
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scalar(@{$responses->[$which]}); |
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if ($answer_size > $response_size) { |
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return 'MISSING_ANSWER'; |
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} |
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if ($answer_size < $response_size) { |
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return 'EXTRA_ANSWER'; |
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} |
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} |
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|
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&LONCAPA_INTERNAL_DEBUG("Initial final response :$responses->[0][-1]:"); |
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my $unit; |
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if ($type eq 'float' || $type eq '') { |
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#for numerical problems split off the unit |
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# if ( $responses->[0][-1]=~ /(.*[^\s])\s+([^\s]+)/ ) { |
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if ( $responses->[0][-1]=~ /^([\d\.\,\s\$]*(?:(?:[xX\*]10[\^\*]*|[eE]*)[\+\-]*\d*)*(?:^|\S)\d+)([\$\s\w\^\*\/\(\)\+\-]*[^\d\.\s\,][\$\s\w\^\*\/\(\)\+\-]*)$/ ) { |
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$responses->[0][-1]=$1; |
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$unit=&capa_formula_fix($2); |
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&LONCAPA_INTERNAL_DEBUG("Found unit :$unit:"); |
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} |
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} |
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&LONCAPA_INTERNAL_DEBUG("Final final response :$responses->[0][-1]:$unit:"); |
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$unit=~s/\s//; |
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my $error; |
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foreach my $response (@$responses) { |
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foreach my $element (@$response) { |
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if (($type eq 'float') || (($type eq '') && ($unit ne ''))) { |
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$element =~ s/\s//g; |
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} |
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my $appendunit=$unit; |
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# Deal with percentages |
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# unit is unit entered by student, answerunit is unit by author |
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# Deprecated: divide answer by 100 if student entered percent, |
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# but author did not. Too much confusion |
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# if (($unit=~/\%/) && ($answerunit ne '%')) { |
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# $element=$element/100; |
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# $appendunit=~s/\%//; |
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# } |
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# Author entered percent, student did not |
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if (($unit!~/\%/) && ($answerunit=~/\%/)) { |
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$element=$element*100; |
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$appendunit='%'.$appendunit; |
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} |
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# Zero does not need a dimension |
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if (($element==0) && ($unit!~/\w/) && ($answerunit=~/\w/)) { |
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$appendunit=$answerunit; |
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} |
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if ($appendunit ne '') { |
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$element .= " $appendunit"; |
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} |
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&LONCAPA_INTERNAL_DEBUG("Made response element :$element:"); |
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} |
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} |
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|
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foreach my $thisanswer (@{ $LONCAPA::CAPAresponse_answer->{'answers'} }) { |
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if (!defined($thisanswer)) { |
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return ('ERROR','answer was undefined'); |
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} |
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} |
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|
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|
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# &LONCAPA_INTERNAL_DEBUG(&LONCAPA_INTERNAL_Dumper($responses)); |
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my %memoized; |
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if ($LONCAPA::CAPAresponse_answer->{'type'} eq 'ordered') { |
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for (my $i=0; $i<scalar(@$responses);$i++) { |
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my $answer = $LONCAPA::CAPAresponse_answer->{'answers'}[$i]; |
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my $response = $responses->[$i]; |
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my $key = "$answer\0$response"; |
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my (@awards,@msgs); |
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for (my $j=0; $j<scalar(@$response); $j++) { |
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my ($award,$msg) = &caparesponse_check($answer->[$j], |
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$response->[$j]); |
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if ($type eq 'cs' || $type eq 'ci') { |
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$error = &verify_stringresponse($type,$award,$response->[$j], |
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$answer->[$j]); |
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} |
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push(@awards,$award); |
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push(@msgs, $msg); |
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} |
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my ($award,$msg) = |
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&LONCAPA_INTERNAL_FINALIZEAWARDS(\@awards,\@msgs); |
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$memoized{$key} = [$award,$msg]; |
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} |
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} else { |
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#FIXME broken with unorder responses where one is a <value> |
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# and the other is a <vector> (need to delay parse til |
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# inside the loop?) |
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foreach my $response (@$responses) { |
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my $response_size = scalar(@{$response}); |
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foreach my $answer (@{ $LONCAPA::CAPAresponse_answer->{'answers'} }) { |
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my $key = "$answer\0$response"; |
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my $answer_size = scalar(@{$answer}); |
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my ($award,$msg); |
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if ($answer_size > $response_size) { |
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$award = 'MISSING_ANSWER'; |
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} elsif ($answer_size < $response_size) { |
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$award = 'EXTRA_ANSWER'; |
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} else { |
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my (@awards,@msgs); |
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for (my $j=0; $j<scalar(@$response); $j++) { |
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my ($award,$msg) = &caparesponse_check($answer->[$j], |
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$response->[$j]); |
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if ($type eq 'cs' || $type eq 'ci') { |
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$error = &verify_stringresponse($type,$award,$response->[$j], |
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$answer->[$j]); |
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} |
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push(@awards,$award); |
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push(@msgs, $msg); |
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} |
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($award,$msg) = |
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&LONCAPA_INTERNAL_FINALIZEAWARDS(\@awards,\@msgs); |
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} |
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$memoized{$key} = [$award,$msg]; |
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} |
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} |
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} |
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|
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my ($final_award,$final_msg); |
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&init_permutation(scalar(@$responses), |
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$LONCAPA::CAPAresponse_answer->{'type'}); |
| |
|
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# possible FIXMEs |
| |
# - significant time is spent calling non-safe space routine |
| |
# from safe space |
| |
# - early outs could be possible with classifying awards is to stratas |
| |
# and stopping as so as hitting the top strata |
| |
# - some early outs also might be possible with check ing the |
| |
# memoized hash of results (is correct even possible? etc.) |
| |
|
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my (@final_awards,@final_msg); |
| |
while( &get_permutations_left() ) { |
| |
my $order = &get_next_permutation(); |
| |
my (@awards, @msgs, $i); |
| |
foreach my $thisanswer (@{ $LONCAPA::CAPAresponse_answer->{'answers'} }) { |
| |
my $key = "$thisanswer\0".$responses->[$order->[$i]]; |
| |
push(@awards,$memoized{$key}[0]); |
| |
push(@msgs,$memoized{$key}[1]); |
| |
$i++; |
| |
|
| |
} |
| |
&LONCAPA_INTERNAL_DEBUG(" all awards ".join(':',@awards)); |
| |
|
| |
my ($possible_award,$possible_msg) = |
| |
&LONCAPA_INTERNAL_FINALIZEAWARDS(\@awards,\@msgs); |
| |
&LONCAPA_INTERNAL_DEBUG(" pos awards ".$possible_award); |
| |
push(@final_awards,$possible_award); |
| |
push(@final_msg,$possible_msg); |
| |
} |
| |
|
| |
&LONCAPA_INTERNAL_DEBUG(" all final_awards ".join(':',@final_awards)); |
| |
my ($final_award,$final_msg) = |
| |
&LONCAPA_INTERNAL_FINALIZEAWARDS(\@final_awards,\@final_msg,undef,1); |
| |
return ($final_award,$final_msg,$error); |
| |
} |
| |
|
| |
sub verify_stringresponse { |
| |
my ($type,$award,$resp,$ans) = @_; |
| |
return if ($award eq 'EXACT_ANS'); |
| |
my $error; |
| |
if ($resp =~ /^\s|\s$/) { |
| |
$resp =~ s{^\s+|\s+$}{}g; |
| |
} |
| |
if ($ans =~ /^\s|\s$/) { |
| |
$ans =~ s{^\s+|\s+$}{}g; |
| |
} |
| |
if ($type eq 'ci') { |
| |
$resp = lc($resp); |
| |
$ans = lc($ans); |
| |
} |
| |
if ($resp eq $ans) { |
| |
if ($award eq 'INCORRECT') { |
| |
$error = 'MISGRADED'; |
| |
} |
| |
} |
| |
return $error; |
| |
} |
| |
|
| |
sub cas { |
| |
my ($system,$input,$library)=@_; |
| |
my $output; |
| |
my $dump; |
| |
if ($system eq 'maxima') { |
| |
$output=&maxima_eval($input,$library); |
| |
} elsif ($system eq 'R') { |
| |
($output,$dump)=&r_eval($input,$library,0); |
| |
} else { |
| |
$output='Error: unrecognized CAS'; |
| |
} |
| |
return $output; |
| |
} |
| |
|
| |
sub cas_hashref { |
| |
my ($system,$input,$library)=@_; |
| |
if ($system eq 'maxima') { |
| |
return 'Error: unsupported CAS'; |
| |
} elsif ($system eq 'R') { |
| |
return &r_eval($input,$library,1); |
| |
} else { |
| |
return 'Error: unrecognized CAS'; |
| |
} |
| |
} |
| |
|
| |
# |
| |
# cas_hashref_entry takes a list of indices and gets the entry in a hash generated by Rreturn. |
| |
# Call: cas_hashref_entry(Rvalue, index1, index2, ...) where Rvalue is a hash returned by Rreturn. |
| |
# Rentry will return the first scalar value it encounters (ignoring excess indices). |
| |
# If an invalid key is given, it returns undef. |
| |
# |
| |
sub cas_hashref_entry { |
| |
return &Rentry(@_); |
| |
} |
| |
|
| |
# |
| |
# cas_hashref_array takes a list of indices and gets a column array from a hash generated by Rreturn. |
| |
# Call: cas_hashref_array(Rvalue, index1, index2, ...) where Rvalue is a hash returned by Rreturn. |
| |
# If an invalid key is given, it returns undef. |
| |
# |
| |
sub cas_hashref_array { |
| |
return &Rarray(@_); |
| } |
} |
| |
|
| sub tex { |
sub tex { |
| if ( $external::target eq "tex" ) { |
if ( $external::target eq "tex" ) { |
| return @_[0]; |
return $_[0]; |
| } else { |
} else { |
| return @_[1]; |
return $_[1]; |
| } |
} |
| |
} |
| |
|
| |
sub var_in_tex { |
| |
if ( $external::target eq "tex" ) { |
| |
return $_[0]; |
| |
} else { |
| |
return ""; |
| |
} |
| } |
} |
| |
|
| sub web { |
sub web { |
| if ( $external::target eq "tex" ) { |
if ( $external::target eq "tex" ) { |
| return @_[1]; |
return $_[1]; |
| } else { |
|
| if ( $external::target eq "web") { |
|
| return @_[0]; |
|
| } else { |
} else { |
| return @_[2]; |
if ( $external::target eq "web" || $external::target eq "answer") { |
| |
return $_[2]; |
| |
} else { |
| |
return $_[0]; |
| |
} |
| } |
} |
| } |
|
| } |
} |
| |
|
| sub problem { |
sub html { |
| return '1'; |
if ( $external::target eq "web" ) { |
| |
return shift; |
| |
} |
| } |
} |
| |
|
| sub hinton { |
sub hinton { |
| return 0; |
return 0; |
| } |
} |
| |
|
| sub random { |
sub random { |
| my ($start,$end,$step)=@_; |
my ($start,$end,$step)=@_; |
| if ( ! $RANDOMINIT ) { srand($external::randomseed); $RANDOMINIT=1; } |
if ( ! $hidden::RANDOMINIT ) { |
| my $num=1+int(($end-$start)/$step); |
if ($external::randomseed == 0) { $external::randomseed=1; } |
| my $result=$start + int(rand() * $num)*$step; |
if ($external::randomseed =~/,/) { |
| return $result; |
my ($num1,$num2)=split(/,/,$external::randomseed); |
| |
&random_set_seed(1,abs($num1)); |
| |
} elsif ($external::randomseed =~/:/) { |
| |
my ($num1,$num2)=split(/:/,$external::randomseed); |
| |
&random_set_seed(abs($num1),abs($num2)); |
| |
} else { |
| |
&random_set_seed(1,int(abs($external::randomseed))); |
| |
} |
| |
&math_random_uniform(); |
| |
$hidden::RANDOMINIT=1; |
| |
} |
| |
if (!defined($step)) { $step=1; } |
| |
my $num=1+int(($end-$start)/$step); |
| |
my $result=$start + int(&math_random_uniform() * $num)*$step; |
| |
return $result; |
| } |
} |
| |
|
| sub tan { sin($_[0]) / cos($_[0]) } |
sub random_normal { |
| sub acos { atan2(sqrt(1 - $_[0] * $_[0]), $_[0] ); } |
my ($item_cnt,$seed,$av,$std_dev) = @_; |
| sub asin { atan2($_[0], sqrt(1- $_[0] * $_[0]) ); } |
my @oldseed=&random_get_seed(); |
| |
my @retArray; |
| |
&random_set_seed_from_phrase($seed); |
| |
@retArray=&math_random_normal($item_cnt,$av,$std_dev); |
| |
&random_set_seed(@oldseed); |
| |
return @retArray; |
| |
} |
| |
|
| sub html { |
sub random_beta { |
| if ( $external::target eq "web" ) { |
my ($item_cnt,$seed,$aa,$bb) = @_; |
| return @_[0]; |
my @oldseed=&random_get_seed(); |
| } |
my @retArray; |
| |
&random_set_seed_from_phrase($seed); |
| |
@retArray=&math_random_beta($item_cnt,$aa,$bb); |
| |
&random_set_seed(@oldseed); |
| |
return @retArray; |
| |
} |
| |
|
| |
sub random_gamma { |
| |
my ($item_cnt,$seed,$a,$r) = @_; |
| |
my @oldseed=&random_get_seed(); |
| |
my @retArray; |
| |
&random_set_seed_from_phrase($seed); |
| |
@retArray=&math_random_gamma($item_cnt,$a,$r); |
| |
&random_set_seed(@oldseed); |
| |
return @retArray; |
| |
} |
| |
|
| |
sub random_exponential { |
| |
my ($item_cnt,$seed,$av) = @_; |
| |
my @oldseed=&random_get_seed(); |
| |
my @retArray; |
| |
&random_set_seed_from_phrase($seed); |
| |
@retArray=&math_random_exponential($item_cnt,$av); |
| |
&random_set_seed(@oldseed); |
| |
return @retArray; |
| } |
} |
| |
|
| |
sub random_poisson { |
| |
my ($item_cnt,$seed,$mu) = @_; |
| |
my @oldseed=&random_get_seed(); |
| |
my @retArray; |
| |
&random_set_seed_from_phrase($seed); |
| |
@retArray=&math_random_poisson($item_cnt,$mu); |
| |
&random_set_seed(@oldseed); |
| |
return @retArray; |
| |
} |
| |
|
| |
sub random_chi { |
| |
my ($item_cnt,$seed,$df) = @_; |
| |
my @oldseed=&random_get_seed(); |
| |
my @retArray; |
| |
&random_set_seed_from_phrase($seed); |
| |
@retArray=&math_random_chi_square($item_cnt,$df); |
| |
&random_set_seed(@oldseed); |
| |
return @retArray; |
| |
} |
| |
|
| |
sub random_noncentral_chi { |
| |
my ($item_cnt,$seed,$df,$nonc) = @_; |
| |
my @oldseed=&random_get_seed(); |
| |
my @retArray; |
| |
&random_set_seed_from_phrase($seed); |
| |
@retArray=&math_random_noncentral_chi_square($item_cnt,$df,$nonc); |
| |
&random_set_seed(@oldseed); |
| |
return @retArray; |
| |
} |
| |
|
| |
sub random_f { |
| |
my ($item_cnt,$seed,$dfn,$dfd) = @_; |
| |
my @oldseed=&random_get_seed(); |
| |
my @retArray; |
| |
&random_set_seed_from_phrase($seed); |
| |
@retArray=&math_random_f($item_cnt,$dfn,$dfd); |
| |
&random_set_seed(@oldseed); |
| |
return @retArray; |
| |
} |
| |
|
| |
sub random_noncentral_f { |
| |
my ($item_cnt,$seed,$dfn,$dfd,$nonc) = @_; |
| |
my @oldseed=&random_get_seed(); |
| |
my @retArray; |
| |
&random_set_seed_from_phrase($seed); |
| |
@retArray=&math_random_noncentral_f($item_cnt,$dfn,$dfd,$nonc); |
| |
&random_set_seed(@oldseed); |
| |
return @retArray; |
| |
} |
| |
|
| |
sub random_multivariate_normal { |
| |
my ($item_cnt,$seed,$mean,$covar) = @_; |
| |
my @oldseed=&random_get_seed(); |
| |
&random_set_seed_from_phrase($seed); |
| |
my @retArray=&math_random_multivariate_normal($item_cnt,@$mean,@$covar); |
| |
&random_set_seed(@oldseed); |
| |
return @retArray; |
| |
} |
| |
|
| |
sub random_multinomial { |
| |
my ($item_cnt,$seed,@p) = @_; |
| |
my @oldseed=&random_get_seed(); |
| |
my @retArray; |
| |
&random_set_seed_from_phrase($seed); |
| |
my @retArray=&math_random_multinomial($item_cnt,@p); |
| |
&random_set_seed(@oldseed); |
| |
return @retArray; |
| |
} |
| |
|
| |
sub random_permutation { |
| |
my ($seed,@inArray) = @_; |
| |
my @oldseed=&random_get_seed(); |
| |
my @retArray; |
| |
&random_set_seed_from_phrase($seed); |
| |
@retArray=&math_random_permutation(@inArray); |
| |
&random_set_seed(@oldseed); |
| |
return @retArray; |
| |
} |
| |
|
| |
sub random_uniform { |
| |
my ($item_cnt,$seed,$low,$high) = @_; |
| |
my @oldseed=&random_get_seed(); |
| |
my @retArray; |
| |
&random_set_seed_from_phrase($seed); |
| |
@retArray=&math_random_uniform($item_cnt,$low,$high); |
| |
&random_set_seed(@oldseed); |
| |
return @retArray; |
| |
} |
| |
|
| |
sub random_uniform_integer { |
| |
my ($item_cnt,$seed,$low,$high) = @_; |
| |
my @oldseed=&random_get_seed(); |
| |
my @retArray; |
| |
&random_set_seed_from_phrase($seed); |
| |
@retArray=&math_random_uniform_integer($item_cnt,$low,$high); |
| |
&random_set_seed(@oldseed); |
| |
return @retArray; |
| |
} |
| |
|
| |
sub random_binomial { |
| |
my ($item_cnt,$seed,$nt,$p) = @_; |
| |
my @oldseed=&random_get_seed(); |
| |
my @retArray; |
| |
&random_set_seed_from_phrase($seed); |
| |
@retArray=&math_random_binomial($item_cnt,$nt,$p); |
| |
&random_set_seed(@oldseed); |
| |
return @retArray; |
| |
} |
| |
|
| |
sub random_negative_binomial { |
| |
my ($item_cnt,$seed,$ne,$p) = @_; |
| |
my @oldseed=&random_get_seed(); |
| |
my @retArray; |
| |
&random_set_seed_from_phrase($seed); |
| |
@retArray=&math_random_negative_binomial($item_cnt,$ne,$p); |
| |
&random_set_seed(@oldseed); |
| |
return @retArray; |
| |
} |
| |
|
| |
sub abs { CORE::abs(shift) } |
| |
sub sin { CORE::sin(shift) } |
| |
sub cos { CORE::cos(shift) } |
| |
sub exp { CORE::exp(shift) } |
| |
sub int { CORE::int(shift) } |
| |
sub log { CORE::log(shift) } |
| |
sub atan2 { CORE::atan2($_[0],$_[1]) } |
| |
sub sqrt { CORE::sqrt(shift) } |
| |
|
| |
sub tan { CORE::sin($_[0]) / CORE::cos($_[0]) } |
| |
#sub atan { atan2($_[0], 1); } |
| |
#sub acos { atan2(sqrt(1 - $_[0] * $_[0]), $_[0] ); } |
| |
#sub asin { atan2($_[0], sqrt(1- $_[0] * $_[0]) ); } |
| |
|
| |
sub log10 { CORE::log($_[0])/CORE::log(10); } |
| |
|
| |
sub factorial { |
| |
my $input = CORE::int(shift); |
| |
return "Error - unable to take factorial of an negative number ($input)" if $input < 0; |
| |
return "Error - factorial result is greater than system limit ($input)" if $input > 170; |
| |
return 1 if $input == 0; |
| |
my $result = 1; |
| |
for (my $i=2; $i<=$input; $i++) { $result *= $i } |
| |
return $result; |
| |
} |
| |
|
| |
sub sgn { |
| |
return -1 if $_[0] < 0; |
| |
return 0 if $_[0] == 0; |
| |
return 1 if $_[0] > 0; |
| |
} |
| |
|
| |
sub min { |
| |
my @sorted = sort { $a <=> $b || $a cmp $b } @_; |
| |
return shift @sorted; |
| |
} |
| |
|
| |
sub max { |
| |
my @sorted = sort { $a <=> $b || $a cmp $b } @_; |
| |
return pop @sorted; |
| |
} |
| |
|
| |
sub roundto { |
| |
my ($input,$n) = @_; |
| |
return sprintf('%.'.$n.'f',$input); |
| |
} |
| |
|
| |
sub to_string { |
| |
my ($input,$n) = @_; |
| |
return sprintf($input) if $n eq ""; |
| |
$n = '.'.$n if $n !~ /^\./; |
| |
return sprintf('%'.$n,$input) if $n ne ""; |
| |
} |
| |
|
| |
sub sub_string { |
| |
my ($str,$start,$len) = @_; |
| |
return substr($str,$start-1,$len); |
| |
} |
| |
|
| sub pow {return $_[0] ** $_[1]; } |
sub pow {return $_[0] ** $_[1]; } |
| sub ceil {return (($_[0]-int($_[0]))== 0.0) ? $_[0] : (int($_[0])+ 1); } |
sub ceil {return (($_[0]-CORE::int($_[0]))== 0.0) ? $_[0] : (($_[0] > 0) ? (CORE::int($_[0])+ 1) : CORE::int($_[0])); } |
| sub floor {return int($_[0]); } |
sub floor {return (($_[0]-CORE::int($_[0]))== 0.0) ? $_[0] : (($_[0] > 0) ? CORE::int($_[0]) : (CORE::int($_[0])-1)); } |
| |
#sub floor {return int($_[0]); } |
| |
|
| sub format { |
sub format { |
| my ($value,$fmt)=@_; |
my ($value,$fmt)=@_; |
| return sprintf('%.'.$fmt,$value); |
my ($dollarmode,$commamode,$alwaysperiod,$options); |
| |
if ($fmt =~ /^([^\d]*)(.*)/) { $options=$1; $fmt=$2; } |
| |
#if ($options =~ /\$/) { $dollamode=1; } |
| |
#if ($options =~ /,/) { $commamode=1; } |
| |
if ($options =~ /\./) { $alwaysperiod=1; } |
| |
my $result; |
| |
if ($fmt=~/s$/i) { |
| |
$result=&format_significant_figures($value,$fmt); |
| |
} else { |
| |
$fmt=~s/e/E/g; |
| |
$result=sprintf('%.'.$fmt,$value); |
| |
if ($alwaysperiod && $fmt eq '0f') { $result .='.'; } |
| |
$result=~s/(E[+-]*)0/$1/; |
| |
} |
| |
#if ($dollarmode) {$result=&dollarformat($result);} |
| |
#if ($commamode) {$result=&commaformat($result);} |
| |
return $result; |
| |
} |
| |
|
| |
sub chemparse { |
| |
my ($reaction) = @_; |
| |
my @tokens = split(/(\s\+|\->|<=>|<\-|\.)/,$reaction); |
| |
my $formula = ''; |
| |
foreach my $token (@tokens) { |
| |
if ($token eq '->' ) { |
| |
$formula .= '<m>\ensuremath{\rightarrow}</m> '; |
| |
next; |
| |
} |
| |
if ($token eq '<-' ) { |
| |
$formula .= '<m>\ensuremath{\leftarrow}</m> '; |
| |
next; |
| |
} |
| |
if ($token eq '<=>') { |
| |
if ($external::target eq 'web' && |
| |
&EXT('request.browser.unicode')) { |
| |
$formula .= '⇌ '; |
| |
} else { |
| |
$formula .= &web('<=> ','<m>\ensuremath{\rightleftharpoons}</m> ', |
| |
'<=> '); |
| |
} |
| |
next; |
| |
} |
| |
if ($token eq '.') { |
| |
$formula =~ s/(\ \;| )$//; |
| |
$formula .= '·'; |
| |
next; |
| |
} |
| |
$token =~ /^\s*([\d|\/]*(?:&frac\d\d)?)(.*)/; |
| |
$formula .= $1 if ($1 ne '1'); # stoichiometric coefficient |
| |
|
| |
my $molecule = $2; |
| |
# subscripts |
| |
$molecule =~ s|(?<=[a-zA-Z\)\]\s])(\d+)|<sub>$1</sub>|g; |
| |
# superscripts |
| |
$molecule =~ s|\^(\d*[+\-]*)|<sup>$1</sup>|g; |
| |
# strip whitespace |
| |
$molecule =~ s/\s*//g; |
| |
# forced space |
| |
$molecule =~ s/_/ /g; |
| |
$molecule =~ s/-/−/g; |
| |
$formula .= $molecule.' '; |
| |
} |
| |
# get rid of trailing space |
| |
$formula =~ s/(\ \;| )$//; |
| |
return &xmlparse($formula); |
| |
} |
| |
|
| |
sub prettyprint { |
| |
my ($value,$fmt,$target)=@_; |
| |
my $result; |
| |
if (!$target) { $target = $external::target; } |
| |
if ($fmt =~ /chem/i) { return(&chemparse($value)); } |
| |
my ($dollarmode,$commamode,$alwaysperiod,$options); |
| |
if ($fmt =~ /^([^\d]*)(.*)/) { $options=$1; $fmt=$2; } |
| |
if ($options =~ /\$/) { $dollarmode=1; } |
| |
if ($options =~ /,/) { $commamode=1; } |
| |
if ($options =~ /\./) { $alwaysperiod=1; } |
| |
if ($fmt=~/s$/i) { |
| |
$value=&format_significant_figures($value,$fmt); |
| |
} elsif ($fmt) { |
| |
$value=sprintf('%.'.$fmt,$value); |
| |
} |
| |
if ($alwaysperiod && $fmt eq '0f') { |
| |
if ($target eq 'tex') { |
| |
$value .='\\ensuremath{.}'; |
| |
} else { |
| |
$value .='.'; |
| |
} |
| |
} |
| |
if ($value =~ /([0-9\.\-\+]+)E([0-9\-\+]+)/i ) { |
| |
my $frac=$1; |
| |
if ($dollarmode) { $frac=&dollarformat($frac); } |
| |
if ($commamode) { $frac=&commaformat($frac); } |
| |
my $exponent=$2; |
| |
$exponent=~s/^\+0*//; |
| |
$exponent=~s/^-0*/-/; |
| |
$exponent=~s/^-0*/-/; |
| |
if ($exponent eq '-') { undef($exponent); } |
| |
if ($exponent) { |
| |
if ($target eq 'web') { |
| |
$result=$frac.'×10<sup>'.$exponent.'</sup>'; |
| |
} elsif ($target eq 'tex') { |
| |
$result='\ensuremath{'.$frac.'\times 10^{'.$exponent.'}}'; |
| |
} else { |
| |
$result=$value; |
| |
} |
| |
} else { |
| |
$result=$frac; |
| |
} |
| |
} else { |
| |
$result=$value; |
| |
if ($dollarmode) { $result=&dollarformat($result,$target); } |
| |
elsif ($commamode) { $result=&commaformat($result,$target); } |
| |
} |
| |
return $result; |
| |
} |
| |
|
| |
sub commaformat { |
| |
my ($number,$target) = @_; |
| |
if ($number =~ /\./) { |
| |
while ($number =~ /([^0-9]*)([0-9]+)([^\.,][^\.,][^\.,])([,0-9]*\.[0-9]*)$/) { |
| |
$number = $1.$2.','.$3.$4; |
| |
} |
| |
} else { |
| |
while ($number =~ /^([^0-9]*)([0-9]+)([^,][^,][^,])([,0-9]*)$/) { |
| |
$number = $1.$2.','.$3.$4; |
| |
} |
| |
} |
| |
return $number; |
| |
} |
| |
|
| |
sub dollarformat { |
| |
my ($number,$target) = @_; |
| |
if (!$target) { $target = $external::target; } |
| |
$number=&commaformat($number,$target); |
| |
if ($target eq 'tex') { |
| |
$number='\$'.$number; #' stupid emacs |
| |
} else { |
| |
$number='$'.$number; #' stupid emacs |
| |
} |
| |
return $number; |
| |
} |
| |
|
| |
# format of form ns or nS where n is an integer |
| |
sub format_significant_figures { |
| |
my ($number,$format) = @_; |
| |
return '0' if ($number == 0); |
| |
# extract number of significant figures needed |
| |
my ($sig) = ($format =~ /(\d+)s/i); |
| |
# arbitrary choice - suggestions ?? or throw error message? |
| |
$sig = 3 if ($sig eq ''); |
| |
# save the minus sign |
| |
my $sign = ($number < 0) ? '-' : ''; |
| |
$number = abs($number); |
| |
# needed to correct for a number greater than 1 (or |
| |
my $power = ($number < 1) ? 0 : 1; |
| |
# could round up. Take the integer part of log10. |
| |
my $x10 = int(log($number)/log(10)); |
| |
# find number with values left of decimal pt = # of sign figs. |
| |
my $xsig = $number*10**($sig-$x10-$power); |
| |
# get just digits left of decimal pt - also rounds off correctly |
| |
my $xint = sprintf('%.0f',$xsig); |
| |
# save any trailing zero's |
| |
my ($zeros) = ($xint =~ /(0+)$/); |
| |
# return number to original magnitude |
| |
my $numSig = $xint*10**($x10-$sig+$power); |
| |
# insert trailing zero's if have decimal point |
| |
$numSig =~ s/^(\d+)\.(\d+)(\e?(.*)?)$/$1\.$2$zeros$3/; |
| |
# put a decimal pt for number ending with 0 and length = # of sig fig |
| |
$numSig.='.' if (length($numSig) == $sig && $numSig =~ /0$/); |
| |
if (length($numSig) < $sig) { |
| |
$numSig.='.'.substr($zeros,0,($sig-length($numSig))); |
| |
} |
| |
# return number with sign |
| |
return $sign.$numSig; |
| |
|
| } |
} |
| |
|
| sub map { |
sub map { |
| my $num = $#_/2; |
my ($phrase,$dest,$source)=@_; |
| my $i; |
my @oldseed=&random_get_seed(); |
| my @used; |
my @seed = &random_seed_from_phrase($phrase); |
| my @permutation; |
&random_set_seed(@seed); |
| for ($i=0; $i < $num;) { |
my $destct = scalar(@$dest); |
| $rand = &random(1,$num,1); |
if (!$source) { |
| if ( $used[$rand] == '0' ) { |
my @output; |
| $i++; |
my @idx = &math_random_permuted_index($destct); |
| $used[$rand]='1'; |
my $ctr = 0; |
| $permutation[$i]=$rand; |
while ($ctr < $destct) { |
| } |
$output[$ctr] = $$dest[$idx[$ctr]]; |
| } |
$ctr++; |
| for ( $i=1 ; $i<$num+1 ; $i++ ) { |
} |
| ${$_[$permutation[$i]]}=$_[$i+$num] |
&random_set_seed(@oldseed); |
| } |
return @output; |
| |
} else { |
| |
my $num = scalar(@$source); |
| |
my @idx = &math_random_permuted_index($num); |
| |
my $ctr = 0; |
| |
my $tot = $num; |
| |
$tot = $destct if $destct < $num; |
| |
if (ref($$dest[0])) { |
| |
while ($ctr < $tot) { |
| |
${$$dest[$ctr]} = $$source[$idx[$ctr]]; |
| |
$ctr++; |
| |
} |
| |
} else { |
| |
while ($ctr < $tot) { |
| |
$$dest[$ctr] = $$source[$idx[$ctr]]; |
| |
$ctr++; |
| |
} |
| |
} |
| |
} |
| |
&random_set_seed(@oldseed); |
| |
return ''; |
| |
} |
| |
|
| |
sub rmap { |
| |
my ($phrase,$dest,$source)=@_; |
| |
my @oldseed=&random_get_seed(); |
| |
my @seed = &random_seed_from_phrase($phrase); |
| |
&random_set_seed(@seed); |
| |
my $destct = scalar(@$dest); |
| |
if (!$source) { |
| |
my @idx = &math_random_permuted_index($destct); |
| |
my $ctr = 0; |
| |
my @r_idx; |
| |
while ($ctr < $destct) { |
| |
$r_idx[$idx[$ctr]] = $ctr; |
| |
$ctr++; |
| |
} |
| |
my @output; |
| |
$ctr = 0; |
| |
while ($ctr < $destct) { |
| |
$output[$ctr] = $$dest[$r_idx[$ctr]]; |
| |
$ctr++; |
| |
} |
| |
&random_set_seed(@oldseed); |
| |
return @output; |
| |
} else { |
| |
my $num = scalar(@$source); |
| |
my @idx = &math_random_permuted_index($num); |
| |
my $ctr = 0; |
| |
my $tot = $num; |
| |
$tot = $destct if $destct < $num; |
| |
my @r_idx; |
| |
while ($ctr < $tot) { |
| |
$r_idx[$idx[$ctr]] = $ctr; |
| |
$ctr++; |
| |
} |
| |
$ctr = 0; |
| |
if (ref($$dest[0])) { |
| |
while ($ctr < $tot) { |
| |
${$$dest[$ctr]} = $$source[$r_idx[$ctr]]; |
| |
$ctr++; |
| |
} |
| |
} else { |
| |
while ($ctr < $tot) { |
| |
$$dest[$ctr] = $$source[$r_idx[$ctr]]; |
| |
$ctr++; |
| |
} |
| |
} |
| |
} |
| |
&random_set_seed(@oldseed); |
| |
return ''; |
| |
} |
| |
|
| |
sub capa_id { return } |
| |
|
| |
sub problem { return } |
| |
|
| |
sub name{ |
| |
my $fullname = &EXT('environment.lastname').', '.&EXT('environment.firstname').' '.&EXT('environment.middlename'); |
| |
$fullname = "" if $fullname eq ", "; |
| |
$fullname =~ s/\%2d/-/g; |
| |
return $fullname; |
| |
} |
| |
|
| |
sub student_number { |
| |
my $id = &EXT('environment.id'); |
| |
$id = '' if $id eq ""; |
| |
return $id; |
| |
} |
| |
|
| |
sub class { |
| |
my $course = &EXT('course.description'); |
| |
$course = '' if $course eq ""; |
| |
return $course; |
| |
} |
| |
|
| |
sub firstname { |
| |
my $firstname = &EXT('environment.firstname'); |
| |
$firstname = '' if $firstname eq ""; |
| |
return $firstname; |
| |
} |
| |
|
| |
sub lastname { |
| |
my $lastname = &EXT('environment.lastname'); |
| |
$lastname = '' if $lastname eq ""; |
| |
return $lastname; |
| |
} |
| |
|
| |
sub sec { |
| |
my $sec = &EXT('request.course.sec'); |
| |
$sec = '' if $sec eq ""; |
| |
return $sec; |
| |
} |
| |
|
| |
sub submission { |
| |
my ($partid,$responseid,$subnumber)=@_; |
| |
my $sub=''; |
| |
if ($subnumber) { $sub=$subnumber.':'; } |
| |
return &EXT('user.resource.'.$sub.'resource.'.$partid.'.'.$responseid.'.submission'); |
| |
} |
| |
|
| |
sub currentpart { |
| |
return $external::part; |
| |
} |
| |
|
| |
sub eval_time { |
| |
my ($timestamp)=@_; |
| |
unless ($timestamp) { return ''; } |
| |
return &locallocaltime($timestamp); |
| |
} |
| |
|
| |
sub open_date { |
| |
my ($partid)=@_; |
| |
unless ($partid) { $partid=0; } |
| |
return &eval_time(&EXT('resource.'.$partid.'.opendate')); |
| |
} |
| |
|
| |
sub due_date { |
| |
my ($partid)=@_; |
| |
unless ($partid) { $partid=0; } |
| |
return &eval_time(&EXT('resource.'.$partid.'.duedate')); |
| |
} |
| |
|
| |
sub answer_date { |
| |
my ($partid)=@_; |
| |
unless ($partid) { $partid=0; } |
| |
return &eval_time(&EXT('resource.'.$partid.'.answerdate')); |
| |
} |
| |
|
| |
sub open_date_epoch { |
| |
my ($partid)=@_; |
| |
unless ($partid) { $partid=0; } |
| |
return &EXT('resource.'.$partid.'.opendate'); |
| |
} |
| |
|
| |
sub due_date_epoch { |
| |
my ($partid)=@_; |
| |
unless ($partid) { $partid=0; } |
| |
return &EXT('resource.'.$partid.'.duedate'); |
| |
} |
| |
|
| |
sub answer_date_epoch { |
| |
my ($partid)=@_; |
| |
unless ($partid) { $partid=0; } |
| |
return &EXT('resource.'.$partid.'.answerdate'); |
| |
} |
| |
|
| |
sub array_moments { |
| |
my @input=@_; |
| |
my (@output,$N); |
| |
$N=scalar (@input); |
| |
$output[0]=$N; |
| |
if ($N <= 1) { |
| |
$output[1]=$input[0]; |
| |
$output[1]="Input array not defined" if ($N == 0); |
| |
$output[2]="variance undefined for N<=1"; |
| |
$output[3]="skewness undefined for N<=1"; |
| |
$output[4]="kurtosis undefined for N<=1"; |
| |
return @output; |
| |
} |
| |
my $sum=0; |
| |
foreach my $line (@input) { |
| |
$sum+=$line; |
| |
} |
| |
$output[1] = $sum/$N; |
| |
my ($x,$sdev,$var,$skew,$kurt) = 0; |
| |
foreach my $line (@input) { |
| |
$x=$line-$output[1]; |
| |
$var+=$x**2; |
| |
$skew+=$x**3; |
| |
$kurt+=$x**4; |
| |
} |
| |
$output[2]=$var/($N-1); |
| |
$sdev=CORE::sqrt($output[2]); |
| |
if ($sdev == 0) { |
| |
$output[3]="inf-variance=0"; |
| |
$output[4]="inf-variance=0"; |
| |
return @output; |
| |
} |
| |
$output[3]=$skew/($sdev**3*$N); |
| |
$output[4]=$kurt/($sdev**4*$N)-3; |
| |
return @output; |
| } |
} |
| |
|
| sub choose { |
sub choose { |
| my $num = $_[0]; |
my $num = $_[0]; |
| return $_[$num]; |
return $_[$num]; |
| } |
} |
| #$external::randomseed=time; |
|
| #$a=2; |
#&sum1(1,$x,sub { &sum1($_[0],2*$_[0], sub { fact($_[0])**2 })}); |
| #$b=2; |
#sub sum1 { |
| #$c=2; |
# my ($start,$end,$sub)=@_; |
| #&map(1,\$a,\$b,\$c,3,4,5); |
# my $sum=0; |
| #print $a."\n".$b."\n"; |
# for (my $i=$start;$i<=$end;$i++) { |
| |
# $sum+=&$sub($i); |
| |
# } |
| |
# return $sum |
| |
#} |
| |
|
| |
#&sum2('a',1,$x,'&sum2(\'b\',$a,2*$a, \'&factorial($b)**2\')'); |
| |
#sub sum2 { |
| |
# my ($varname,$start,$end,$line)=@_; |
| |
# my $sum=0; |
| |
# for (my $i=$start;$i<=$end;$i++) { |
| |
# my $func=sub { |
| |
# eval("\$".$varname."=$i"); |
| |
# eval($line); |
| |
# }; |
| |
# $sum+=&$func($i); |
| |
# } |
| |
# return $sum |
| |
#} |
| |
|
| |
# expiremental idea |
| |
sub proper_path { |
| |
my ($path)=@_; |
| |
if ( $external::target eq "tex" ) { |
| |
return '/home/httpd/html'.$path; |
| |
} else { |
| |
return $path; |
| |
} |
| |
} |
| |
|
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