[SciPy-user] Construct sparse matrix from sparse blocks
Fri Feb 8 14:43:18 CST 2008
On Fri, 08 Feb 2008 12:02:41 -0600, Nathan Bell wrote:
> On Feb 8, 2008 8:15 AM, Neilen Marais <email@example.com> wrote:
> Thanks for sharing this with us. I think it would make a useful
> addition to scipy.sparse, so if there are no objections I'll integrate
> it in some form.
+1 from me :)
> Do you actually need the the row and column offset, or would a sparse
> analog of numpy's bmat() be more appropriate?
> Specifically, would it be preferable to produce your example
> A = [A_aa 0 ]
> [0 A_bb]
> using the interface merge_sparse_blocks currently supports or something
> like bmat_sparse( [[A_aa, None],[None,A_bb]] )
> We could also provide hstack_sparse() and vstack_sparse() functions
> also. Thoughts?
I was unaware of the bmat like interface. I simply implemented the
interface that seemed easiest implementation wise to me. Both the bmat
and sparse hstack/vstack interfaces sound pretty nice to me... Avoids the
possiblity of messing up the offsets.
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