[SciPy-Dev] adding Khatri-Rao product to linalg

[rlucas7 at vt.edu]

No objections on inclusion from me-I could see some niche statistical applications for this one, so +1 for the feature. Those statistical applications would likely be in other packages taking a dependency on scipy.

I took a brief look at the PR, it looks like all tests are with dense arrays. 
 should they cover sparse arrays too or is explicitly out of scope here?

Not super familiar myself with how the sparse codes work I in scipy.
It would seem that sparse Khatri-Rao with a dense or a sparse should be possible, not sure if result should be sparse or dense though so figured I’d ask the question. 

-Lucas Roberts 

> On Feb 14, 2020, at 10:05 PM, Ralf Gommers <ralf.gommers at gmail.com> wrote:
> 
> 
> Hi all,
> 
> I think this wasn't run by this list yet: https://github.com/scipy/scipy/pull/11456 is a PR to add the Khatri-Rao product to scipy.linalg. It seems like a good fit to me. Please comment here or on the PR soon if you disagree. Unless there's objections, we'll merge it in a few days.
> 
> Cheers,
> Ralf
> 
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