Expanding on kennethk's reply, here's a snippet showing how to reverse the order of columns in a matrix of arbitrary size: 

#!/usr/bin/perl

use Math::MatrixReal;
use strict;

my $mref = [
  [ 1, 2, 3, 4, 5, 6 ],
];

my $matrix = Math::MatrixReal->new_from_rows($mref);

my ($rows, $cols) = $matrix->dim();

for(my $currentcol = 1; $currentcol <= $cols / 2; $currentcol++) {
  $matrix->swap_col($currentcol, $cols - $currentcol + 1);
}

[download]

I'm sure there's other (better) ways of doing this, but this works.

In reply to Re: Reverse the order of matrix printing using Math::MatrixReal by AppleFritter
in thread Reverse the order of matrix printing using Math::MatrixReal by John007

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