[Numpy-discussion] Possible Deprecation of np.ediff1d

[Eric Wieser]

There is already a patch to add such a feature to np.diff at
https://github.com/numpy/numpy/pull/8206
​

On Mon, 27 Aug 2018 at 10:47 Charles R Harris <charlesr.harris at gmail.com>
wrote:

> On Mon, Aug 27, 2018 at 11:37 AM Robert Kern <robert.kern at gmail.com>
> wrote:
>
>> On Mon, Aug 27, 2018 at 10:30 AM Tyler Reddy <tyler.je.reddy at gmail.com>
>> wrote:
>>
>>> Chuck suggested (
>>> https://github.com/numpy/numpy/pull/11805#issuecomment-416069436 ) that
>>> we may want to consider deprecating np.ediff1d, which is perhaps not much
>>> more useful than np.diff, apart from having some arguably strange prepend /
>>> append behavior added in.
>>>
>>> Related discussion on SO:
>>> https://stackoverflow.com/questions/39014324/difference-between-numpy-ediff1d-and-diff
>>>
>>> Thoughts?
>>>
>>
>> Huh. Never knew this existed. I'd say about 50% of the time I use
>> np.diff(), I'm doing that prepend/append behavior manually (and less
>> readably, possibly inefficiently, but most importantly annoyingly).
>>
>
> I was thinking we might want to add something to `np.diff`, maybe using
> `np.pad`.
>
> Chuck
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