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我有一个矩阵阵列,我想乘以一个矢量(所以矩阵中的第一个数组应该乘以矢量中的第一个数值等)。用矢量乘以矩阵阵列
import numpy as np
# Three matrices/double arrays
a = np.array([[1,2], [3, 4]])
b = np.array([[2,3], [4, 5]])
c = np.array([[3,4], [5, 6]])
# An array of matrices
d = np.array([a, b, c])
# A vector
e = np.array([1,2,3])
# Multiply every matrix by the corresponding value in the vector
f = [ d[i] * e[i] for i in range(len(e)) ]
# Somewhat to my surpise however, this doesn't work
g = d * e # <-- Doesn't work
# Nor does
h = e * d # <-- Doesn't work
所以列表理解的作品,但我怀疑如果这是最有效的方式做事。
我可以忽略一些非常简单的东西吗?
谢谢。这样可行!但是......如何......?!? – Tom
此外,形成它看起来像,我得到的矩阵复制的印象,对.. ..?? 我可以在d上做类似的技巧吗(因为这会更便宜,我认为)\ – Tom
当然。请参阅我的编辑 – shx2