numpy.count_nonzero(a)
Counts the number of non-zero values in the array a
.
Parameters: |
a : array_like The array for which to count non-zeros. |
---|---|
Returns: |
count : int or array of int Number of non-zero values in the array. |
See also
nonzero
>>> np.count_nonzero(np.eye(4)) 4 >>> np.count_nonzero([[0,1,7,0,0],[3,0,0,2,19]]) 5
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https://docs.scipy.org/doc/numpy-1.11.0/reference/generated/numpy.count_nonzero.html