From: unbewusst.sein@... (=?ISO-8859-1?Q?Une_B=E9v?= =?ISO-8859-1?Q?ue?=)
Date: 2007-11-21T04:35:00+09:00
Subject: Re: [Matrix] eigenvalues, eigenvectors in Ruby ???

Axel Etzold <AEtzold@gmx.de> wrote:

> 
> Am I wrong in thinking that you can use that library without being 
> forced to calculate in Floats, i.e. can one use Rationals, Sqrts,
> continued fractions, whatever as matrix entries ?

yes i had this prob with gsl, my matrices (coming from chemistry then
having only integer numbers...) print out with -0.000e+00 for 0 and
1.000e+00 for 1 ...)

I'll try it asap ( http://rubyforge.org/projects/matrix ) because the
readme says :

The project consists of some enhancements to the Ruby "Matrix" module
and includes: LU and QR (Householder, Givens, Gram Schmidt, Hessenberg)
decompositions, bidiagonalization, eigenvalue and eigenvector
-----------------------------------^^^^^^^^^^^----^^^^^^^^^^^
calculations.


i need also permutation matrices, whose i didn't understood in gsl...

anyway, thanks a lot !!!

-- 
Une B�vue