From: Cameron McBride <cameron.mcbride@...>
Date: 2007-11-21T05:11:09+09:00
Subject: Re: [Matrix] eigenvalues, eigenvectors in Ruby ???

On Nov 20, 2007 2:35 PM, Une Bévue
<unbewusst.sein@weltanschauung.com.invalid> 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 ...)

To be clear, the printing accuracy isn't the machine accuracy.  The
-0.000e+00 is just the specific
format that the GSL::Matrix object uses for printing.

Also, the default matrix in GSL is a double (float) based one.  You
can create integer matricies.  Look at the manual.

Cameron