From octave-sources-request at bevo dot che dot wisc dot edu Thu Dec  6 12:25:28 2001
Subject: Re: Echelon form m-files
From: Paul Kienzle <pkienzle at jazz dot ncnr dot nist dot gov>
To: nozai at tmbg dot org, octave-sources@bevo.che.wisc.edu
Date: Thu, 6 Dec 2001 13:25:12 -0500

On Thu, Dec 06, 2001 at 11:29:53AM -0600, Jason Karcz wrote:
> 
> Attached are two m-files that can be put in the
> /usr/share/octave/x.x.x/m/linear-algebra/ directory to
> add the functionality of row echelon and reduced row
> echelon form.  These are an incredibly large part of
> linear algebra, and these files have been tested on
> matricies large and small (including empty).  They
> work.

A search of the octave archives will reveal over a page of
references to rref, and at least three different implementations.

One of these is available in octave-forge (http://octave.sf.net).

In practice there is no need for rref since Octave has functions
like rank, lu, inv and the \ operator.

Paul Kienzle
pkienzle at users dot sf dot net