In the while loop, these 2 statements:
$sum += $col5;
push @numbers, $col5;
$sum and @numbers need to be declared before the while loop that reads the file.
Then after each file is read, statements:
while (my ($i, $num) = each @numbers) {
push @{ $output[$i] }, $num/$sum;
}
You would need to declare @output before the foreach loop begins.
Then after all the files have been read and the info collected, you could print it out like: print OUT join(",", @$_), "\n" for @output;
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