python中按行和按列的多个矩阵

Question

我想将2个矩阵与row by元素和col by col如下乘以

N = 100; r = [ [0.5] , [0.01] , [0.04] , [0.01] ]; 
x1 = np.random.randn(4,N);
x2 = np.tile(r,(1,N));
x = np.multiply(np.array(x1),np.array(x2));

2个矩阵为4 x 100，当我使用小矩阵进行测试时，结果为true，但是对于大矩阵，我总是得到错误的结果。

x1 = [ [1] , [0.5] , [3] , [0] ];
x2 = [ [2] , [0] , [2] , [3] ];
x = np.multiply(np.array(x1),np.array(x2));

  

结果是：x = [[2]，[0]，[6]，[0]];

非常感谢您的帮助。