[SciPy-user] What happened to ARPACK shift-invert/general eigenproblem routine?

Nils Wagner nwagner@iam.uni-stuttgart...
Mon Feb 11 14:50:11 CST 2008


On Mon, 11 Feb 2008 18:05:51 +0000 (UTC)
  Neilen Marais <nmarais@sun.ac.za> wrote:
> Hi,
> 
> I used to use 
>scipy.sandbox.arpack.speigs.ARPACK_gen_eigs() to use the 
> shift-invert mode of ARPACK to solve my problems. With 
>the move of arpack 
> from sandbox to splinalg.arpack I can't seem to find 
>this function. Any hints?
> 
> Thanks
> Neilen
> 

Did you try

from scipy.splinalg.eigen.arpack import speigs
  
>>> dir (speigs)
['ARPACK_eigs', 'ARPACK_gen_eigs', 'ARPACK_iteration', 
'ArpackException', '__all___', '__builtins__', '__doc__', 
'__file__', '__name__', '_arpack', 'check_init', 
'init_debug', 'init_postproc_workspace', 
'init_workspaces', 'np', 'postproc', 'warnings']

Nils


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