Python3数组及矩阵运算

import numpy as np数组 建立二维数组索引 A = np.array([[1,2],[3,4]])it B = np.array([[5,6],[7,8]])import 加减numpy A + Bim A - B统计 乘法（区别数组与矩阵）二维数组 A * B #输出为 array（[[5,12],[21,32]]）di np.dot(A,B) #输出为array([[19,22

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