[SciPy-user] Re: linalg.eig on sparse matrices

Travis E. Oliphant oliphant at ee.byu.edu
Thu Jan 22 12:54:07 CST 2004

H Jansen wrote:
> One may want to have a look at pysparse:
> http://people.web.psi.ch/geus/pyfemax/pysparse.html

Sparse matrices are definitely a candidate for SciPy.  In fact, there is 
rudimentary support for Sparse matrices already there.

The plan is to rewrite the Sparse matrix class into one (or more) Python 
type objects and support at least two different types of Sparse 
matrices:  linked-list (for fast matrix formation),  compressed sparse 
row (and compressed sparse column) for fast matrix manipulation.  Four 
different data types are planned for these matrices.

There is a project out there that gets a bit of the way there (I think 
it may be this one you speak of) but there is more to do to make it 
general purpose enough.

If there are individuals out there with experience with Sparse matrices, 
this would be a great place to help out with development.

-Travis Oliphant

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