numpy矩阵的乘法问题

dot或者matmul表示矩阵相乘;

multiply或者*表示矩阵中的对应元素相乘;

示例：

import numpy as np

# a = torch.randn(2, 3, 4)
# b = torch.randn(4, 4)
# c = torch.matmul(a, b)
# print(c)
# print(c.size())
a = np.arange(0, 9).reshape(3, 3)
b = np.arange(0, 9).reshape(3, 3)
np.ma
c = np.multiply(a, b)
d = a * b
e = np.dot(a, b)
print(a)
print(b)
print(c)
print(d)
print(e)

输出：
[[0 1 2]
 [3 4 5]
 [6 7 8]]

[[0 1 2]
 [3 4 5]
 [6 7 8]]

[[ 0  1  4]
 [ 9 16 25]
 [36 49 64]]

[[ 0  1  4]
 [ 9 16 25]
 [36 49 64]]

[[ 15  18  21]
 [ 42  54  66]
 [ 69  90 111]]

Process finished with exit code 0