From help-request at octave dot org Thu Jan  6 09:24:02 2005
Subject: Re: How can one get the size of a sparse matrix ?
From: Andy Adler <adler at site dot uottawa dot ca>
To: Schloegl Alois <alois dot schloegl at tugraz dot at>
cc: help at octave dot org
Date: Thu, 6 Jan 2005 10:25:48 -0500 (EST)

On Thu, 6 Jan 2005, Schloegl Alois wrote:

> I'm using Andy Adlers Sparse toolbox using Octave-forge.
>
> octave:10> which sparse
> sparse is the dynamically-linked function from the file
> /usr/local/libexec/octave/2.1.64/site/oct/i686-pc-linux-gnu/octave-forge/sparse.oct
>
> When I try to obtain number of rows and columns of a sparse matrix, I get always -1.
>
> octave:11> X = sparse(2:5,1:4,1);
> octave:12> size(X),
> ans =
>   -1  -1

This is unusual behaviour. The functions are supposed to give the right answer.
I remember seeing this once, but unfortunately I don't remember what I did
to produce this behaviour. It is a bug, somewhere.

--
Andy Adler <adler AT site.uOttawa.ca> 1(613)562-5800x6218




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