[SciPy-user] Sparse eigensolver

Robert Cimrman cimrman3@ntc.zcu...
Mon Dec 10 03:53:27 CST 2007

There is also scipy.sandbox.lobpcg (pure scipy code, depending 
temporarily on symeig, until symeig functionality is in scipy)

It seems to run with recent scipy, but lobpcg/tests/benchmark.py gives 
two additional zero eigenvalues that are not in symeig results. Nils, 
have you tried it recently? This used to work...


lorenzo bolla wrote:
> sure: scipy.sandbox.arpack
> it's in the sandbox, so you have to enable it and recompile scipy.
> note that there is a patch for arpack.py (google for it).
> L.
> On 12/6/07, Matthieu Brucher <matthieu.brucher@gmail.com> wrote:
>> Hi,
>> Is there a package for scipy (or a function in scipy directly) that can
>> compute the eigen values and the eigen vectors of a sparse matrix, like the
>> eigs function in Malab ?

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