And you would be well advised to spend some time becoming acquainted with the "Perl Data Structures Cookbook", found in your documentation as "perldsc".

You might also be well advised to consider using an HoH - a Hash of Hashes which means you do not need to fill every position in the matrix. Whilst in other languages you might find a matrix the easiest way of dealing with such a dataset it has been my experience that in Perl it is rarely the best way. Matrices are best kept for dealing with data which can be represented no other way.

I would also re-iterate the advice already given that you should always use strict and warnings, you would have found the error long before opening your browser to come here.

jdtoronto


In reply to Re: simple matrix by jdtoronto
in thread simple matrix by steverippl

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.