Re: [Numpy-discussion] Find index of repeated numbers in array

Ross Williamson wrote:

Hi Everyone

I think I'm missing something really obvious but what I would like to do is extract the indexes from an array where a number matches - For example

data = [0,1,2,960,5,6,960,7]

I would like to know, for example the indices which match 960 - i.e. it would return 3 and 6

import numpy as np In[14]: np.where( np.array( data ) == 960 ) Out[14]: (array([3, 6]),) If you need to count all of the items, try something like np.histogram( data, np.max( data ) ) cheers, r.