[Numpy-discussion] Release of NumPy
Stéfan van der Walt
stefan@sun.ac...
Thu Apr 17 06:16:02 CDT 2008
On 17/04/2008, Travis E. Oliphant <oliphant@enthought.com> wrote:
> I have mixed feelings on all of this discussion. I do want to make
> sure, however, that two ideas are considered:
>
> 1) How will sparse matrices behave? It seems to me that the matrix
> object and sparse matrices should behave identically if at all possible.
That's a good question. Sparse matrices are not containers -- they
are always 2-dimensional, so it brings us back to what a "row" slice
of a sparse matrix should be: probably a sparse matrix. That's the
way matrices behave currently, but that behaviour differs from the
ndarray behaviour -- where we have N-d arrays containing (N-1)-d
arrays.
> 2) How much code will break if we change the current behavior.
None (for dense matrices), if we introduce vectors. The only
difference in behaviour would be for x[0][0] which then becomes
equivalent to the ndarray syntax.
Stéfan
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