[SciPy-user] eigenvalues of sparse matrix
Robert Kern
rkern at ucsd.edu
Tue Nov 16 18:09:42 EST 2004
Nick Arnett wrote:
> David Grant wrote:
>
>> Sorry, another sparse question: Is there anything is scipy which can
>> find the eigenvalues and eigenvectors of a sparse matrix?
>
>
> Having read all the followups, it seems to me that I must be asking a
> dumb question -- but won't linalg.svd do this?
>
> Begging for education, really...
An SVD is not the same as an eigen decomposition.
http://mathworld.wolfram.com/EigenDecomposition.html
http://mathworld.wolfram.com/SingularValueDecomposition.html
In any case, all of the linalg.* functions only operate on dense arrays,
not sparse matrices.
--
Robert Kern
rkern at ucsd.edu
"In the fields of hell where the grass grows high
Are the graves of dreams allowed to die."
-- Richard Harter
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