1.numpy乘法运算中"*"或multiply(),是数组元素逐个计算,具体代码如下:
import numpy as np
# 2-D array: 2 x 3
two_dim_matrix_one = np.array([[1, 2, 3], [4, 5, 6]])
another_two_dim_matrix_one = np.array([[7, 8, 9], [4, 7, 1]])
# 对应元素相乘 element-wise product
element_wise = two_dim_matrix_one * another_two_dim_matrix_one
print('element wise product: %s' %(element_wise))
# 对应元素相乘 element-wise product
element_wise_2 = np.multiply(two_dim_matrix_one, another_two_dim_matrix_one)
print('element wise product: %s' % (element_wise_2))
2.numpy乘法运算中dot是按照矩阵乘法的规则来运算的,具体实现代码如下:
来源:oschina
链接:https://my.oschina.net/u/4395699/blog/3897018