If all you need to do is calculate the sums then this might help:
my %count;
while (my $line = <DATA>) {
chomp $line;
my @cols = split("\t",$line);
$count{$_} += $cols[$_] for 0 .. $#cols;
}
for my $col_num (sort { $a <=> $b } keys %count) {
print "Total for column $col_num: $count{$col_num}\n";
}
__DATA__
1 2 3 4
3 4 5 6
6 7 8 9
Output:
Total for column 0: 10
Total for column 1: 13
Total for column 2: 16
Total for column 3: 19
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