I have to admit, I clicked on this node because I wanted to see a reference to "The Matrix", e.g. "There is no spoon." But now that I've looked at your code, I thought I'd give some feedback:

  1. use strict. Really. A lot of problems will become apparent if you do.
  2. In populate, you use $element without declaring it (you declare $elements.)
  3. In populate, you use $matrix without declaring it. So $matrix[$element] will always return 0.
  4. Within the main code, you continuously use $row and $col without ever changing them. So you are always indexing at 0, 0. (I assume $length1 and $length2 were initialized elsewhere, otherwise they too are always equal to 0).
  5. Even if $row and $col changed, setting $matrix_ref->[row][$col] to \@test is setting all elements to be a reference to the same array (@test). I'm pretty sure that's not what you want.
Items 2, 3, and 4 would have been immediately obvious had you used strict.

-Ton
-----
Be bloody, bold, and resolute; laugh to scorn
The power of man...

In reply to Re: Matrix Reference by ton
in thread Matrix Reference by The_Rev

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.