Hi Hugo,

Re PDL: it is possible to add types, using PDL::Types. Each type needs to be something the C compiler understands, though.

It does occur to me that perhaps you could stick with the types that are already there, and pack your flags into a byte (or larger) datatype, then use bitwise operators to work on them. Take a look at bandover() and borover() in PDL::Ufunc.

In general: PDL is great and well worth the time spent learning. The chief disadvantage is that occasionally the syntax of PDL threading, and the amount of power that you can put into one statement, can make your head explode. Ensure a plentiful supply of calming tea and biscuits while learning.

Also, once you start doing threaded ops on large matrices, it's easy to run out of memory - that's not PDL's fault though.

Best, andye

In reply to Re: decomposing binary matrices (2) by andye
in thread decomposing binary matrices (2) by hv

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.