python:在numpy中将两个1d矩阵相乘 [英] python: Multiply two 1d matrices in numpy
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问题描述
a = np.asarray([1,2,3])
b = np.asarray([2,3,4,5])
a.shape
(3,)
b.shape
(4,)
我想要一个3 x 4矩阵，它是a和b的乘积
I want a 3 by 4 matrix that's the product of a and b
1
2 * 2 3 4 5
3
np.dot(a，b.transpose())
np.dot(a, b.transpose())
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: objects are not aligned
点积仅在数组为2d时等效于矩阵乘法，因此np.dot不起作用.
dot product is only equivalent to matrix multiplication when the array is 2d, so np.dot doesn't work.
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