Beefy Boxes and Bandwidth Generously Provided by pair Networks
Don't ask to ask, just ask

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??
After reading through the thread, I think its timely to call your attention that Genetic Algorithm (GA) is not the one and only choice when solving the classroom scheduling problem. While I am not proficient in the field, in my understanding of combinatorial optimization, your problem is a special form of the broader range of assignment problems, and as such, it quite naturally lends itself to be formulated as an integer linear program (ILP). Here you can read a pretty good introduction to the topic with the most important backgrounds.

Now, the only thing that remained to be done is to actually solve the resultant ILP. For this I coded and maintain (unfortunately, out of CPAN) a nice Perl module, Math::GLPK, which wraps the GNU Linear Programming Toolkit (GLPK). Based on my thorough experience with GLPK and ILPs, you have pretty good chance to obtain 100 percent optimal solution in all cases as long as the size of the problem remains of similar range as yours.

It is clear that both approaches have its pros and cons. However, for me at least, the ILP approach proved itself much more natural and concise than any other formulations of hard combinatorial optimization problems...


In reply to Re: Looking for help with AI::Genetic and classroom scheduling by rg0now
in thread Looking for help with AI::Genetic and classroom scheduling by merlyn

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, 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, 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.
  • Log In?

    What's my password?
    Create A New User
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others surveying the Monastery: (5)
    As of 2015-11-28 03:59 GMT
    Find Nodes?
      Voting Booth?

      What would be the most significant thing to happen if a rope (or wire) tied the Earth and the Moon together?

      Results (737 votes), past polls