Hi,

From how I understood your question, you want to get the total for each columns... So, I replaced this code 
for my $to (sort keys %from_to_bytes){
        printf "%10s", "$from_to_bytes{$to}";
}

[download]
with this one. 
my %total_col;
for my $i (keys %from_to_bytes) {
    for my $j (keys %{ $from_to_bytes{$i} }) {
        $total_col{$j} += $from_to_bytes{$i}->{$j};
    }
}

print " " x 11;
for my $i (sort keys %total_col) {
    printf " %10s", "$total_col{$i}";
}

print "\n";

[download]
Although as you can see there is some more work needed in the formatting. Hope this helps.

In reply to Re: matrix - creating total row/column by bichonfrise74
in thread matrix - creating total row/column by GertMT

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