分类：numpy数组相乘

2021
03-16

python3 numpy中数组相乘np.dot(a,b)运算的规则说明

pythonnp.dot(a,b)运算规则解析首先我们知道dot运算时不满足交换律的，np.dot(a,b)与np.dot(b,a)是不一样的另外np.dot(a,b)和a.dot(b)果是一样的1.numpy中数组相乘np.dot(a,b)运算条件：对于两数组a和b：示例一：a=np.array([[3],[3],[3]])#(3,1)b=np.array([2,2,1])#(3,)print(a,"\na的shape",a.shape)print(b,"\nb的shape",b.shape)c=b.dot(a)print(c,"\nc的shape",c.shape)输出：[3][3]]a的shape(3... 继续阅读 >