numpy.size#

numpy.size(a, axis=None)[原始碼]#

Return the number of elements along a given axis.

Parameters:

aarray_like: Input data.
axisNone or int or tuple of ints, optional: Axis or axes along which the elements are counted. By default, give the total number of elements.

在 2.4 版的變更: Extended to accept multiple axes.

Returns:

element_countint: Number of elements along the specified axis.

也參考

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

Examples

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