Actually, i think that using an array of array references is a wonderful fit for this problem. You just need to familiarize yourself with how Perl dereferences them: 

my $two_d = [
   [1,2,3],
   [4,5,6],
   [7,8,9],
];

# how many columns?
print scalar @$two_d;

# how many rows in second column?
print scalar @{ $two_d->[1] };

[download]
But, having said that, whenever i need a "real" Matrix, i use Math::Matrix. Wonderful module. :) And, it too uses an array reference of array references to store the matrix in: 
use Math::Matrix;
use Data::Dumper;

my $two_d = [
   [1,2,3],
   [4,5,6],
   [7,8,9],
];

my $m = Math::Matrix->new($two_d);
print Dumper $m;

[download]
but the benefits of using the module instead of rolling your own are the helper methods such as size() and transpose().

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)

In reply to Re: Resizable Matrix, or similar data structure. by jeffa
in thread Resizable Matrix, or similar data structure. by PerlingTheUK

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