[SciPy-dev] [arpack] eigen_symmetric and the sigma value

Matthieu Brucher matthieu.brucher@gmail....
Thu Feb 28 08:16:44 CST 2008


2008/2/28, Aric Hagberg <hagberg@lanl.gov>:
>
> On Thu, Feb 28, 2008 at 03:01:25PM +0100, Matthieu Brucher wrote:
> > According to the tickets, it seems that the shift are implemented for
> real
> > matrices, isn't it ?
>
>
> There is an alternate interface
>
> http://www.scipy.org/scipy/scipy/browser/trunk/scipy/sparse/linalg/eigen/arpack/speigs.py
> that should solve the shift-invert problem for real (double) matrices.
> This functionality needs to be folded into the other (arpack.py) interface
> and
> extended to work for all matrix types.  You might be able to make it
> work for you until we get to that.


OK, I'll try this, hoping that it behaves like MAtlab's version ;)
I'll keep the list informed !

Matthieu
-- 
French PhD student
Website : http://matthieu-brucher.developpez.com/
Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92
LinkedIn : http://www.linkedin.com/in/matthieubrucher
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