[SciPy-user] Sparse eigensolver
Nils Wagner
nwagner at iam.uni-stuttgart.de
Mon Dec 10 12:03:11 EST 2007
On Mon, 10 Dec 2007 10:53:27 +0100
Robert Cimrman <cimrman3 at ntc.zcu.cz> wrote:
>
> 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...
python -i
local/lib64/python2.3/site-packages/scipy/sandbox/lobpcg/tests/benchmark.py
****** 128
Results by LOBPCG
128 [ 1. 4. 9. 16. 25. 36. 49. 64. 81.
100.]
Results by symeig
128 [ 1. 4. 9. 16. 25. 36. 49. 64. 81. 100.]
****** 256
Results by LOBPCG
256 [ 1. 4. 9. 16. 25. 36. 49. 64. 81.
100.]
Results by symeig
256 [ 1. 4. 9. 16. 25. 36. 49. 64. 81. 100.]
****** 512
Results by LOBPCG
512 [ 1. 4. 9. 16. 25. 36. 49. 64. 81. 100.]
Results by symeig
512 [ 1. 4. 9. 16. 25. 36. 49. 64. 81.
100.]
****** 1024
Results by LOBPCG
1024 [ 1. 4. 9. 16. 25. 36. 49. 64.
81. 100.]
Results by symeig
1024 [ 1. 4. 9. 16. 25. 36. 49. 64. 81. 100.]
****** 2048
Results by LOBPCG
2048 [ 1. 4. 9. 16. 25. 36. 49. 64. 81. 100.]
Results by symeig
2048 [ 1. 4. 9. 16. 25. 36. 49. 64.
81. 100.]
Cheers,
Nils
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