numpy.ma.size

numpy.ma.size(obj, axis=None)[源代码]

Return the number of elements along a given axis.

Parameters:
a : array_like

Input data.

axis : int, optional

Axis along which the elements are counted. By default, give the total number of elements.

Returns:
element_count : int

Number of elements along the specified axis.

参见

shape
dimensions of array
ndarray.shape
dimensions of array
ndarray.size
number of elements in array

Examples

>>> a = np.array([[1,2,3],[4,5,6]])
>>> np.size(a)
6
>>> np.size(a,1)
3
>>> np.size(a,0)
2