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Hi linseyr, this is a script I came up with on the fly I hope it is self explanitory. The only messy part is using a huge literal because I was'nt smart enough to figure out something else.. or I was too lazy? But anyway I use file handles instead of references to them, gather the data in arrays first and then do my comparing using a variable $lesser_value to keep track of if I have the least possible value for the chrx. Best wishes, and feel free to ask any questions! hope this helps. -Rudolf

use v5.14; open(TEST,'<',"test.txt") or die $!; my @test_data = <TEST>; close(TEST); open(REFERENCE,'<',"reference.txt") or die $!; my @reference_data = <REFERENCE>; close(REFERENCE); my @results; for my $line(@test_data){ my $lesser_val = 9999999999999999; my($chr,$val) = split(/ /,$line); for my $ref_line(@reference_data){ my($ref_chr,$ref_val) = split(/ /,$ref_line); if($ref_chr eq $chr){ $lesser_val = ($ref_val-$val) if ($ref_val-$val < $lesser_val +); } } push(@results,"$chr $lesser_val"); } say foreach @results;

In reply to Re: compare text files by Rudolf
in thread compare text files by linseyr

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