[SciPy-user] Invert a sparse matrix
Thu Oct 4 08:46:42 CDT 2007
another hint: to build a sparse matrix use scipy.sparse.lil_matrix (if
possible) and to do multiplications first convert it to csr (or csc) format.
On 10/4/07, Alan G Isaac <firstname.lastname@example.org> wrote:
> On Thu, 4 Oct 2007, Robin apparently wrote:
> > I will have a very large matrix, that must remain sparse
> > to fit in memory, and I need to use it for some basic
> > operations (matrix-vector multiplication by itself and
> > it's inverse).
> Are you sure you need an inverse?
> If you are just solving equation systems,
> you usually do not.
> Alan Isaac
> SciPy-user mailing list
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