python中numpy矩阵运算等整理

一  array对象乘法运算 import numpy as np a=np.array([[1,2],[3,4]]) b=np.array([[4,3],[2,1]]) print(a*b) print(np.matmul(a,b)) import numpy as np a=np.array([[1,2],[3,4]]) b=np.array([4,3]) print(a*b) print(n

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