[Numpy-discussion] Possible Deprecation of np.ediff1d (original) (raw)

Eric Wieser wieser.eric+numpy at gmail.com
Mon Aug 27 13:58:55 EDT 2018

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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