[SciPy-dev] sparse matrix support status
cimrman3 at ntc.zcu.cz
Fri Oct 7 09:46:49 CDT 2005
Travis Oliphant wrote:
> Robert Cimrman wrote:
>> Hi all,
>> I would like to know what is the status of the sparse matrix support
>> in SciPy. Searching the scipy- mailing lists did not reveal anything
>> recent. Is there some code to work on? I would like to help - though I
>> am a newbie to the Scipy world, I do have experience with sparse
>> If there is nothing yet, a quick possibility would be to wrap a
>> library like sparskit2 and give it a pythonic feel. What are your
> 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.
I have tried to send some suggestions directly to Travis to know his
opinion before posting it to the list, but some internet-born monster
ate them all, so let me summarize it here:
I am just redesigning a finite element code (some example results
obtained by colleagus are at
http://www-rocq.inria.fr/MACS/Coeur/index.html) written in matlab+c for
python+c, so the proposals below scratch mainly my itches, but they
might be of a more general interest.
1. add the umfpack sparse solver
2. I have at hand several convenient and fast routines for CSR format in
the context of assembling finite element matrices, namely
- preallocate the exact storage of the global CSR matrix corresponding
to a given finite element mesh (i.e. create a neighbour graph for the
nodes in the mesh).
- insert/add a full or sparse block (the element "stiffness" matrix)
into a preallocated CSR matrix (the global matrix)
I will pythonize the code in all cases, but do you think it would be
useful to have it in scipy?
Well, and I am willing to do some other work too, but let me first
reduce my level of scipy-newbieness...
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