numpy.sum()坐标轴问题的解决

由于本人在实际应用中遇到了有关 numpy.sum() 函数参数 axis 的问题，这里特来记录一下。也供大家参考。

示例

代码如下：

import numpy as np

array = np.array([[1, 1, 1, 1],
                  [2, 2, 2, 2]])

sum_x = np.sum(array, axis=0)
sum_y = np.sum(array, axis=1)
sum_z = np.sum(array, axis=-1)
print("The value of sum_x is: ")
print(sum_x)
print("The value of sum_y is: ")
print(sum_y)
print("The value of sum_z is: ")
print(sum_z)
"""
The value of sum_x is: 
[3 3 3 3]
The value of sum_y is: 
[4 8]
The value of sum_z is: 
[4 8]
"""

来源：https://blog.csdn.net/u011699626/article/details/120952744