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numpy.count_nonzero()

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: Return the coordinates of all the non-zero values.

Examples

>>> np.count_nonzero(np.eye(4))
4
>>> np.count_nonzero([[0,1,7,0,0],[3,0,0,2,19]])
5

Links:

https://docs.scipy.org/doc/numpy-1.11.0/reference/generated/numpy.count_nonzero.html

doc_NumPy

2017-01-10 18:13:33

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