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? Best wishes, Tyler
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