From: Matthew Moss <matthew.moss.coder@...>
Date: 2006-03-23T08:28:26+09:00
Subject: Re: questions/suggestions from a Ruby newbie

Ooops, nevermind.  I didn't actually test []=.  Apologies.


On 3/22/06, Matthew Moss <matthew.moss.coder@gmail.com> wrote:
> > 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
>