Hi, The perl code worked really well and for the columns more than 2 i can just use 
for my $c(1..16)

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Can you explain me a little bit what some portions of your code is doing. In the while loop you are adding each line of the input file as an array ref into an array named input 
while (<>) {
    chomp;
    my @s = split /\t/,$_;
    push @input ,\@s;
}

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Can you explain me the use of map and what exactly is that line doing? Also can you right this statement in the loop form rather than one line. It is easy to understand 
$output[$_][$c] = $x++ for sort { $input[$b][$c] <=> $input[$a][$c] } 
+0 .. $#input;

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Thanks

In reply to Re^2: manipulating a data table by v15
in thread manipulating a data table by v15

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