Re: [Help-gsl] newbie eigenvalues

[Brian Gough]

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?

Hello,

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 - http://www.network-theory.co.uk/gsl/manual/