[Numpy-discussion] Reminder: weekly status meeting

[Ralf Gommers]

On Sat, Oct 27, 2018 at 6:10 AM Hameer Abbasi <einstein.edison at gmail.com>
wrote:

> Hi Stefan!
>
> PyData/Sparse is pretty far along, by January or so we should have a
> CSR/CSC replacement that is ND. It needs optimisation in a lot of cases but
> the API is compatible with NumPy and works pretty well already IMO.
>
> PyData/Sparse is pretty much independent of any changes to scipy.sparse at
> this point. We build on top of NumPy, not scipy.sparse.
>
> Feel free to use any or all of my code for sparray, although I think Ralf
> Gommers, Matthew Rocklin and others were of the opinion that the data
> structure should stay in PyData/Sparse and linear algebra and csgraph etc
> should go into SciPy.
>

Just to make sure we're talking about the same things here: Stefan, I think
with "sparray" you mean "an n-D sparse array implementation that lives in
SciPy", nothing more specific? In that case pydata/sparse is the one
implementation, and including it in scipy.sparse would make it "sparray".
I'm currently indeed leaning towards depending on pydata/sparse rather than
including it in scipy.

Cheers,
Ralf



> Best Regards,
> Hameer Abbasi
>
> On Friday, Oct 26, 2018 at 7:03 PM, Stefan van der Walt <
> stefanv at berkeley.edu> wrote:
> Hi Hameer,
>
> On Fri, 26 Oct 2018 10:47:09 +0200, Hameer Abbasi wrote:
>
> The only core functionality dependent on scipy.sparse is matrix
> multiplication and the like. Everything else is for inter-operability.
>
>
> Thank you for commenting here.
>
> As you know, I am enthusiastic about seeing an `sparray` equivalent to
> `spmatrix`. When we last spoke, my recollection was that it would be
> beneficial to `pydata/sparse`. Is this still correct?
>
> If not, are we now in a situation where it would be more helpful to
> build `sparray` based on `pydata/sparse`.
>
> If we can have a good sparse array API in place in SciPy, it may
> significantly simplify code in various other libraries (I'm thinking of
> scikit-learn, e.g.).
>
> Best regards,
> Stéfan
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