I have created PR#9481 to introduce a `ratio` function that behaves very
similarly to `diff`, except that it divides successive elements instead of
subtracting them. It has some handling built in for zero division, as well
as the ability to select between `/` and `//` operators.
There is currently no masked version. Perhaps someone could suggest a
simple mechanism for hooking np.ma.true_divide and np.ma.floor_divide in as
the operators instead of the regular np.* versions.
Please let me know your thoughts.
Regards,
-Joe
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