[SciPy-user] Sparse v. dense matrix, SVD and LSI-like analysis

Nick Arnett narnett at mccmedia.com
Wed Nov 17 15:06:32 CST 2004

Pearu Peterson wrote:

> Of course they are. Just with the current implementation one must 
> transform a sparse matrix to a full matrix (that may contain lots of 
> zeros) before applying linalg functions.

Okay, now I get it -- I was imagining that there was some mathematical 
difference between dense and sparse matrices that I wasn't aware of... 
What we're talking about is the representation, if I understand correctly.

And... whew.


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