Re: matrix - creating total row/column

[bichonfrise74]

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}";
}

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";

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

[GertMT]

this worked out very nice. Thank you very much. A bit puzzled though..

I understand that for my $i (keys %from_to_bytes) {should be read as: for all members of the family (Fred, Wilma and so on).

However I remain in trouble reading the remaining two lines:

for my $j (keys %{ $from_to_bytes{$i} }) {
        $total_col{$j} += $from_to_bytes{$i}->{$j};

It works but I'd like to understand as well.

Using hashes maybe efficient, learning how to use them takes some time for me.

Gert