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#!/usr/bin/perl -w
# numnormalize: Normalize a set of numbers. By default between 0 and 1.
#
# Copyright (C) 2002-2004 Suso Banderas
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# You may contact the author at <suso@suso.org>.
#######################
# VARIABLES AND SETUP #
#######################
use Getopt::Std;
use strict;
use vars qw/ %opts $verbose /;
my ($file, @number_array, @output_array, $number);
getopts('hdR:V', \%opts);
if ($opts{'h'}) {
&help();
exit(0);
}
if ($opts{'d'}) {
$verbose = 3;
print STDERR "Debug mode\n";
} elsif ($opts{'V'}) {
$verbose = 2;
print STDERR "Verbose mode\n";
} elsif ($opts{'q'}) {
$verbose = 0; # Nothing except the final answer
} else {
$verbose = 1; # Normal warnings and such.
}
################
# MAIN PROGRAM #
################
# For file args
if (@ARGV) {
foreach $file (@ARGV) {
print STDERR "Reading from file $file.\n" if ($verbose >= 2);
open (ARGFILE, "$file") &&
process_filehandle(\*ARGFILE, \@number_array) ||
$verbose && warn "Couldn't open file $file for reading: $!\n";
close (ARGFILE);
}
# For STDIN
} else {
print STDERR "Reading from STDIN.\n" if ($verbose >= 2);
process_filehandle(\*STDIN, \@number_array);
}
@output_array = normalize(\@number_array);
foreach $number (@output_array) {
print "$number\n";
}
exit(0);
###############
# SUBROUTINES #
###############
sub help {
print <<"EOF";
----------------------------------------------
numnormalize : Normalize a set of numbers.
----------------------------------------------
Usage:
numnormalize [options] <file>
| numnormalize [options]
numnormalize [options]
Options:
-d Debug. For developers only.
-h Help: You're looking at it.
-V Increase verbosity.
-R <range> This allows you to specify a different
normalized range instead of from 0 to 1.
For example: -R 0..5
EOF
}
sub process_filehandle {
my $filehandle = shift;
my $number_array_ref = shift;
while (<$filehandle>) {
if (m/^\s*(\-?[0-9]*\.?[0-9]+)/) {
print STDERR "found number: $1\n" if ($verbose >= 3);
push(@$number_array_ref, $1);
}
}
return 1;
}
sub normalize {
my $number_array_ref = shift;
my ($sum, @normalized_array);
my ($top_range, $bottom_range);
if ($opts{'R'}) {
($bottom_range,$top_range) = split(/\.\./, $opts{'R'});
print "R: $opts{'R'}\nbottom: $bottom_range\ntop: $top_range\n" if ($verbose >= 2);
} else {
$bottom_range = 0;
$top_range = 1;
}
foreach $number (@$number_array_ref) {
$sum += $number;
}
foreach $number (@$number_array_ref) {
my $normalized_number = ($number / $sum) * ($top_range - $bottom_range) + $bottom_range;
push(@normalized_array, $normalized_number);
}
return @normalized_array;
}
# Lay down some of that perl pod action.
=pod
=head1 NAME
numnormalize - Normalize a set of numbers. By default between 0 and 1.
=head1 SYNOPSIS
B<numnormalize> [-dhRV] <FILE>
| B<numnormalize> [-dhRV] (Input on STDIN from pipeline.)
B<numnormalize> [-dhRV] (Input on STDIN. Use Ctrl-D to stop.)
=head1 DESCRIPTION
B<numnormalize>
will take a set of numbers on input and return that set as a normalized set of numbers
between 0 and 1 by default. Or you can use the -R option to specify a different normalized
range.
=head1 OPTIONS
-h Help: You're looking at it.
-V Increase verbosity.
-d Debug mode. For developers
-R <range> This allows you to specify a different normalized range instead of from 0 to 1.
For example -R 0..5
=head1 SEE ALSO
numaverage(1), numbound(1), numinterval(1), numgrep(1), numprocess(1), numsum(1), numrandom(1), numrange(1), numround(1)
=head1 COPYRIGHT
numnormalize is part of the num-utils package, which is copyrighted by
Suso Banderas and released under the GPL license. Please read
the COPYING and LICENSE files that came with the num-utils package
Developers can read the GOALS file and contact me about providing
submitions or help for the project.
=head1 MORE INFO
More info on numnormalize can be found at:
=over 1
=item B<http://suso.suso.org/programs/num-utils/>
=back
=cut
|
