From: Justin Collins <collinsj@...>
Date: 2006-03-24T07:17:37+09:00
Subject: Re: Matrices, Gtk et al

Robert Love wrote:
> I have something working but it sure seems clumsy and I'm hoping for 
> pointers to make it better.  My app is a ruby & Gtk thing to do some 
> calculations.  I want to have a standard 3x3 matrix of floating point 
> numbers as well some 3x1 vectors.  I'm using a 9 element array today for 
> the 3x3.  I also have a series of 9 Gtk.Entry fields that is even more 
> clumsy than the floating point numbers.
>
> How do I build a function that, when called by the Calc button callback, 
> fetches the contents of the 9 numbers and returns it as a 3x3 matrix?  
> From what I've read, ruby doesn't have real two dimensional arrays.  So 
> am I stuck doing everything in a manner that doesn't map well to my math 
> problem domain?
>
> All advice appreciated

Try checking out the Matrix standard library:

http://ruby-doc.org/stdlib/libdoc/matrix/rdoc/index.html

-Justin