Try the following:

use strict;
use warnings;

my %sequences;

while (<>) {

    for my $char ( split '', (split)[1] ) {
        $sequences{$char}++;
    }
}

print "$_ => $sequences{$_}", "\n" for keys %sequences;

[download]

Output on your data set:

- => 406
A => 1708
T => 1639
C => 2057
G => 1946

[download]

In reply to Re: What is wrong in this code??? by Kenosis
in thread What is wrong in this code??? by Anonymous Monk

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