version 1.46, 2005/02/24 05:26:00
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version 1.55, 2005/02/24 09:54:01
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Line 213 sub msgtexconverted {
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Line 213 sub msgtexconverted {
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} |
} |
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sub algebra { |
sub algebra { |
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use AlgParser; |
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my ($string,$target)=@_; |
my ($string,$target)=@_; |
my $parser = new AlgParserWithImplicitExpand; |
my $parser = new AlgParserWithImplicitExpand; |
$string=&prepare_algebra($string); |
$string=&prepare_algebra($string); |
my $ret = $parser->parse($string); |
my $ret = $parser->parse($string); |
my $result='['.&mt('Algebra unconverted due to previous errors').']'; |
my $result='['.&mt('Algebra unconverted due to previous errors').']'; |
if ( ref($ret) ) { |
if ( ref($ret) ) { |
$parser->tostring(); |
#$parser->tostring(); |
$parser->normalize(); |
$parser->normalize(); |
my $latex=$parser->tolatex(); |
my $latex=$parser->tolatex(); |
$latex=&postprocess_algebra($string); |
$latex=&postprocess_algebra($latex); |
$latex='$'.$latex.'$'; |
$latex='$'.$latex.'$'; |
if ($target eq 'web' || $target eq 'analyze') { |
if ($target eq 'web' || $target eq 'analyze') { |
$result = &converted(\$latex); |
$result = &converted(\$latex); |
Line 237 sub algebra {
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Line 239 sub algebra {
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sub prepare_algebra { |
sub prepare_algebra { |
my ($string)=@_; |
my ($string)=@_; |
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#protect the confusable greek symbols |
# makes the decision about what is a minus sign easier supposedly |
$string =~ s/delta/zdelta/g; |
$string =~ s/([\=\>\<\%\!\#] *)-/$1 zeroplace -/g; |
$string =~ s/beta/bita/g; |
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$string =~ s/theta/thita/g; |
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$string =~ s/zeta/zita/g; |
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$string =~ s/eta/xeta/g; |
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$string =~ s/epsilon/zepslon/g; |
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$string =~ s/upsilon/zupslon/g; |
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return $string; |
return $string; |
} |
} |
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sub postprocess_algebra { |
sub postprocess_algebra { |
my ($string)=@_; |
my ($string)=@_; |
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# moodle had these and I don't know why, ignoring them for now |
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# $string =~s/\\fun/ /g; |
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# sqrt(3,4) -> \sqrt\let{3,4\right}, which is annoying |
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$string =~s/\\left\{/\{/g; |
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$string =~s/\\right\}/\}/g; |
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# remove the extra () in the denominator of a \frac |
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$string =~s/\\frac{(.+?)}{\\left\((.+?)\\right\)}/\\frac{$1}{$2}/gs; |
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# sqrt(3,4) means the 4 root of 3 |
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$string =~s/\\sqrt{([^,]+),([^\}]+)}/\\sqrt[$2]{$1}/gs; |
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# log(3,4) means the log base 4 of 3 |
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$string =~s/\\log\\left\((.+?),(.+?)\\right\)/\\log_{$2}\\left($1\\right)/gs; |
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# log(3,4) means the log base 4 of 3 |
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$string =~s/\\((?:sin|cos|tan|sec|csc|cot)(?:h)?)\\left\((.+?),(.+?)\\right\)/\\$1^{$3}\\left($2\\right)/gs; |
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# int(3,a,b) integral from a to b of 3 |
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$string =~s/\\int\\left\((.+?),(.+?),(.+?)\\right\)/\\int_{$2}^{$3}\\left($1\\right)/gs; |
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# replace some special symbols with the LaTeX equivalents |
# int( ... dx) -> ... |
$string =~ s/infty/\\infty/g; |
$string =~s/\\int\\left\((.+?)d[a-z]\\right\)/$1/gs; |
$string =~ s/infinity/\\infty/g; |
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$string =~ s/alpha/\\alpha/g; |
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$string =~ s/gamma/\\gamma/g; |
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$string =~ s/iota/\\iota/g; |
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$string =~ s/kappa/\\kappa/g; |
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$string =~ s/lambda/\\lambda/g; |
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$string =~ s/mu/\\mu/g; |
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$string =~ s/nu/\\nu/g; |
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$string =~ s/xi/\\xi/g; |
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$string =~ s/rho/\\rho/g; |
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$string =~ s/sigma/\\sigma/g; |
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$string =~ s/tau/\\tau/g; |
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$string =~ s/phi/\\phi/g; |
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$string =~ s/chi/\\chi/g; |
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$string =~ s/psi/\\psi/g; |
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$string =~ s/omega/\\omega/g; |
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$string =~ s/zdelta/\\delta/g; |
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$string =~ s/bita/\\beta/g; |
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$string =~ s/thita/\\theta/g; |
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$string =~ s/zita/\\zeta/g; |
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$string =~ s/xeta/\\eta/g; |
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$string =~ s/zepslon/\\epsilon/g; |
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$string =~ s/zupslon/\\upsilon/g; |
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&Apache::lonnet::logthis($string); |
return $string; |
return $string; |
} |
} |
1; |
1; |