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#!/usr/bin/env perl
use strict;
use warnings;
my $usage = "usage: $0 matrix.fpkm\n\n";
my $matrix = $ARGV[0] or die $usage;
main: {
open (my $fh, $matrix) or die "Error, cannot open file $matrix";
my $header = <$fh>;
print $header;
while (<$fh>) {
chomp;
my ($acc, @vals) = split(/\t/);
foreach my $val (@vals) {
$val = log($val+1)/log(2);
$val = sprintf("%.2f", $val);
}
print join("\t", $acc, @vals) . "\n";
}
close $fh;
exit(0);
}
####
sub median {
my @nums = @_;
@nums = sort {$a<=>$b} @nums;
my $count = scalar (@nums);
if ($count %2 == 0) {
## even number:
my $half = $count / 2;
return ( ($nums[$half-1] + $nums[$half]) / 2);
}
else {
## odd number. Return middle value
my $middle_index = int($count/2);
return ($nums[$middle_index]);
}
}
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