[SciPy-Dev] scipy.sparse.coo_matrix a new method drop_zero_columns?

[Ralf Gommers]

On Fri, Nov 4, 2016 at 11:40 PM, Evgeny Nekrasov <
evgeny.nekrasov at phystech.edu> wrote:

> Hello,
>
> I am writing to follow up on the discussion https://github.com/scipy/scipy
> /issues/6754
>
> I would be happy to get your opinions.
>

Hi Evgeny, it would be helpful to add to the issue description some links
to code / examples where this method is used or would be useful. Right now
there's just an assertion "this is useful", which is hard to evaluate.

Other questions I would have:
1. The issue has a method for COO, but I'd think we want this for all or
none of the formats?
2. Is it only drop column, or would drop row also make sense?

Ralf
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