numpy.argmax: how to get the index corresponding to the *last* occurrence, in case of multiple occurrences of the maximum values

问题

I have an array of numbers, and the maximum value might occurrence more than once.

Is it possible to find the index of the last occurrence of the maximum value by using something like numpy.argmax?

Or, even better, is it possible to get a list of indices of all the occurrences of the maximum value in the array?

回答1:

import numpy as np

a = np.array((1,2,3,2,3,2,1,3))

occurences = np.where(a == a.max())

# occurences == array([2, 4, 7])

来源：https://stackoverflow.com/questions/7038975/numpy-argmax-how-to-get-the-index-corresponding-to-the-last-occurrence-in-ca