A.mean(0) 与A.mean(1) 与np.mean(A)

1、A.mean(0)

计算每一列的平均值

A = np.array([[1, 2, 3], [3, 3, 6], [4, 6, 8], [4, 7, 7]])
mu1 = A.mean(0)
print(mu1)

输出是

2、A.mean(1)

计算每一行的平均值

A = np.array([[1, 2, 3], [3, 3, 6], [4, 6, 8], [4, 7, 7]])
mu1 = A.mean(1)
print(mu1)

输出是

3、np.mean(A)

计算整体的平均值

A = np.array([[1, 2, 3], [3, 3, 6], [4, 6, 8], [4, 7, 7]])
mu = np.mean(A)
print(mu)

输出是