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pieceofcake · Jun 24 '08, 11:15 PM

Hi Kevin,

Thank you for the code, it worked with my file with the correct output. Well done.

I just wanted to learn how to use a hash of a hash, I am learning perl and trying to practise different ways of solving a problem. To be honest with you, I have always used arrays in perl, and never a hash of hash before, so wanted to try it but for this example dataset I became confused.

I could understand the...

pieceofcake · Jun 23 '08, 10:34 PM

0 A B C D E F G --> thousands more
A 1 0 5 1 2 3 1
B 6 0 2 1 1 1 1
C 1 0 2 1 2 1 1
D 2 0 1 2 1 1 1
E 1 1 0 1 1 1 1
F 0 1 0 1 2 1 9
G 0 1 3 2 1 1 1

thousands more

I have to go through the hash of a hash, so the top line is one hash ref and the column down the side is another. I have to pick each number is over 2, and the letter ref of the row and column are stated...

pieceofcake · Jun 23 '08, 04:58 PM

I have this which is for a 2 column file that has been fed into a hash:- as I was looking at examples of hashes.

Code:

#!/usr/bin/perl -w

use strict;
use warnings;

my $index1;
my $index2;
my %hashname;
my $hashname;

open (LIST1, "test.txt") || die "File not found\n";
     while (<LIST1>) {
          ($index1, $index2) = split(/\t/,

...

pieceofcake · Jun 23 '08, 02:02 PM

A bit more informations:-

I was reading the guidelines, and want to make it clear that I am not asking for code to be written for me. I am just confused as I am new and all the hash examples define the data within the perl code. I am just stating that my file is too large for that, so how do you define the keys and values, using the first row line and the first column. I am just confused by perl toy examples, as they do not show this...

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Large Matrix into a hash of a hash