numpy.count_nonzero — NumPy v1.11 Manual (original) (raw)
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
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