From: Matthew Moss <matthew.moss.coder@...>
Date: 2006-03-23T08:27:34+09:00
Subject: Re: questions/suggestions from a Ruby newbie

> Unfortunatly the Matrix class seems to be very lacking so far. In
> particular there is no (or I could not find) any assignment such as []=
> and similar problems. I know I can write this but I would imagine
> something this basic should be part of the class already. Is there any
> place one can contribute with the code and have it discussed for review
> and inclusion in the future... or just a place to propose future
> improvements?

irb:

> m = Matrix[[1, 2, 3], [4, 5, 6], [7, 8, 9]]
=> Matrix[[1, 2, 3], [4, 5, 6], [7, 8, 9]]

> m[0, 0]
=> 1

> m[2, 1]
=> 8

> m * m
=> Matrix[[30, 36, 42], [66, 81, 96], [102, 126, 150]]

> m.determinant
=> 0

> Matrix[[1,2], [3,4]].determinant
=> -2