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Re: [Help-gsl] newbie eigenvalues

From: Brian Gough
Subject: Re: [Help-gsl] newbie eigenvalues
Date: Thu, 29 Jun 2006 17:23:57 +0100
User-agent: Wanderlust/2.14.0 (Africa) Emacs/21.3 Mule/5.0 (SAKAKI)

At Wed, 28 Jun 2006 19:41:59 +0200,
Fabrizio Laurini wrote:
> I found something quite strange when computing eigenvalues of a simple 
> squared matrix of order 2, whose values are taken from the array
> double data[] = {1.511867, 0, 5.744244, 0};
> Thus, the matrix has the second column with two zeros. I'm expecting to 
> see 1 eigenvalue equal to zero and the second equal to 1.511867, while, 
> after compiling and following the same structure of the example code, I got
> ....
> Am I missing something?


The matrix needs to be symmetric (see docs for details).
Support for unsymetric eigensystems will be in the next release.

best regards,

Brian Gough

Network Theory Ltd,
Publishing the GSL Manual -

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