[SciPy-user] [Fwd: Re: I want to improve the speed of eig().]

Nils Wagner nwagner@iam.uni-stuttgart...
Tue Jul 31 04:23:47 CDT 2007


Ok. I am using the svn version of scipy on linux and I am not familiar
with Windows. Since arpack and lobpcg are still in the sandbox (bleeding edge http://en.wikipedia.org/wiki/Bleeding_edge) I can't give
you further advice.
Anyway it might be a good idea to move arpack and lobpcg into the main tree.
Comments would be appreciated.

However you can send me your matrix off-list. Which eigenvalues do you need ?
I mean you can't compute all of them in case of large sparse matrices.
How about the corresponding eigenvectors ?
Is your matrix real and symmetric ?

Cheers,
                      Nils



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