[SciPy-user] coo_matrix, lapack, cvxopt

Nils Wagner nwagner@iam.uni-stuttgart...
Tue Mar 24 09:49:35 CDT 2009


On Tue, 24 Mar 2009 13:07:16 +0000 (UTC)
  Eric Friedman <ejf27@cornell.edu> wrote:
> Nathan Bell <wnbell <at> gmail.com> writes:
> 
> 
>> > 2) I need to solve large sparse rectangular matrix 
>>equation 
> which doesn't have
>> > full rank, but is solvable.  spsolve (dsolve) doesn't 
>>work. 
> Can I do my own LUP
>> > decomposition using scipy.sparse?
>> 
>> I believe the UMFPACK scikit supports that 
>>functionality.
>> 
> 
> 
> Thanks again!
> 
> fyi, and in case anyone else has a problem like this, I 
>just tried
> sparse.linalg.cg which seems to work 
> (most of the time...but I'm trying to
> figure that out...) and is very fast and doesn't 
> care about singular matrices!
> 
> Eric
> 
You might be interested in
http://www.stanford.edu/group/SOL/dissertations/sou-cheng-choi-thesis.pdf

Nils
  


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