remluvr:

Assuming the data is in the same order, it should be as easy as something like this (untested):

use strict;
use warnings;
use autodie;
open my $IF1, '<', 'File.in1';
open my $IF2, '<', 'File.in2';
open my $OF,  '>', 'File.out';
while (1) {
   my @Rec1 = split /\s+/, <$IF1>;
   my @Rec2 = split /\s+/, <$IF2>;
   $Rec1[-1] += $Rec2[-1];
   print $OF join("\t", @Rec1), "\n";
   last if eof($IF1) and eof($IF2);
}

[download]

Of course, you'll have to add checking to verify that the records are compatible. If you sort the files beforehand, then in the event of a mismatch, you should be able to simply re-read the file containing the "smaller" (in value) string.

Update: As CountZero mentions, stopping the loop might be a good idea. So I added the last statement.

...roboticus

When your only tool is a hammer, all problems look like your thumb.

In reply to Re: Read and analyze two file in parallel by roboticus
in thread Read and analyze two file in parallel by remluvr

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