Fernando Perez wrote:

> >Travis Oliphant wrote:
> >    
> >
> 
>   
> 
> >>There is a sparse matrix in SciPy now:  under Lib/sparse.  I've 
> >>implemented about 3 or 4 sparse matrices over the years, using various 
> >>libraries as back-ends.  Right now, the sparse matrix code builds on top 
> >>of  superlu and some home-grown caclulation tools.
> >>I'd love some help with this.  So, take a look at what's there and see 
> >>how you can help.
> >>      
> >>
> 
> Just a note on this topic: an acquaintance at CU Boulder recently tried using 
> scipy's Lib/sparse and ran some comparisons against pysparse 
> (http://pysparse.sourceforge.net).  He found the pysparse performance to be a 
> lot better, and ended up using that.  Pysparse uses also SuperLU, so I'm not 
> exactly sure what the root cause of the discrepancy may be, and he didn't 
> track it down further (he just switched over to using pysparse and moved on).
>   
> 
I know that pysparse defines some C-types.  But there may be other 
issues as well.  I'd love to merge pysparse stuff in.    Robert Cimrman 
has shown interest in sparse matrices.  Perhaps he could help.

-Travis

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