python count of values in array

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Sara
14 Feb 2016
1a = numpy.array([0, 3, 0, 1, 0, 1, 2, 1, 0, 0, 0, 0, 1, 3, 4])
2unique, counts = numpy.unique(a, return_counts=True)
3dict(zip(unique, counts))
4
5# {0: 7, 1: 4, 2: 1, 3: 2, 4: 1}
6
Juan Martín
23 Jan 2020
1myArray = [1, 2, 3]
2len(myArray)
3#output
43
Anne
16 Jul 2019
1import numpy as np
2y = np.array([0, 0, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1])
3num_zeros = (y == 0).sum()
4num_ones = (y == 1).sum()
5
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