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package Text::NumericData::App::txdnorm; |
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102353
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use Text::NumericData::App; |
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use strict; |
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# This is just a placeholder because of a past build system bug. |
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# The one and only version for Text::NumericData is kept in |
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# the Text::NumericData module itself. |
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our $VERSION = '1'; |
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$VERSION = eval $VERSION; |
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my $infostring = 'normalize data sets |
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(c) 2005 (Artistic License) by Thomas Orgis |
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textdata version x |
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Usage: |
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pipe | txdnorm [parameters] | pipe'; |
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our @ISA = ('Text::NumericData::App'); |
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sub new |
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{ |
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my $class = shift; |
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my @pars = |
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( |
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'to',1,'t', |
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'normalize to this (multiplication)' |
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, 'from',-1,'f', |
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'normalize from this (division) - means this value in input becomes the "to" value in output, if < 0, then normalize to maximum found' |
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, 'xcol',0,'x', |
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'if > 0: choose from value via given value in this column (the x data) - see pos parameter' |
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, 'pos',0,'p', |
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'normalize from the value corresponding to this x value' |
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, 'column',2,'c', |
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'column to normalize, starting at 1' |
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, 'append',0,'a', |
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'instead of overwriting existing column, append a new one (you may want to modify titles afterwards!)' |
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, 'verbose', 1, '', |
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'Give note about error conditions beyond the initial parameter checks (normalizing with zero, etc.).' |
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); |
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return $class->SUPER::new |
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({ |
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parconf=> |
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{ |
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info=>$infostring # default version, |
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# default author |
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# default copyright |
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} |
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,pardef=>\@pars |
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,filemode=>1 |
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,pipemode=>1 |
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,pipe_init=>\&prepare |
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,pipe_file=>\&process_file |
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}); |
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} |
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sub prepare |
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{ |
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my $self = shift; |
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my $param = $self->{param}; |
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unless($param->{from}) |
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{ |
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print STDERR "txdnorm: invalid from value; must be non-zero!\n"; |
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return -1; |
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} |
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print STDERR "txdnorm: you really want to make it all zero?" |
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unless $param->{to}; |
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$param->{column} = int($param->{column}); #paranoia |
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$param->{xcol} = int($param->{xcol}); #paranoia |
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unless($param->{column} > 0) |
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{ |
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print STDERR "txdnorm: invalid column!\n"; |
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return -1; |
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} |
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return 0; |
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} |
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sub process_file |
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{ |
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my $self = shift; |
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my $param = $self->{param}; |
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my $good = 0; |
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my $normcolumn = $param->{column}; |
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if($param->{append} and @{$self->{txd}->{Data}}) |
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{ |
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$normcolumn = $#{$self->{txd}->{Data}[0]}+2; |
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} |
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unless($param->{xcol} > 0) |
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{ |
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if($param->{from} < 0) |
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{ |
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my $max = $self->{txd}->max("abs([$param->{column}])"); |
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print STDERR "txdnorm: unable to perform normalisation from zero!\n" |
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if($max == 0 and $param->{verbose}); |
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$self->{txd}->calc("[$normcolumn] = [$param->{column}] * $param->{to} / $max") |
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unless $max == 0; |
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} |
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else |
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{ |
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$self->{txd}->calc("[$normcolumn] = [$param->{column}] * $param->{to} / $param->{from}"); |
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} |
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$good = 1; |
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} |
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else |
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{ |
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#normalize from chosen point |
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my $val = $self->{txd}->y( $param->{pos} |
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, $param->{xcol}-1, $param->{column}-1 ); |
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if(defined $val) |
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{ |
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print STDERR "txdnorm: unable to perform normalisation from zero!\n" |
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if($val == 0 and $param->{verbose}); |
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$self->{txd}->calc("[$normcolumn] = [$param->{column}] * $param->{to} / $val") |
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unless $val == 0; |
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$good = 1; |
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} |
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else |
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{ |
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print STDERR "txdnorm: found no value to start with, please try interpolation (if you already have, then you're in trouble).\n" |
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if $param->{verbose}; |
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} |
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} |
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$self->{txd}->write_all($self->{out}); |
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} |
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