numpy.tile 中的克隆行

Question

This answer https://stackoverflow.com/a/1582742/13326667 has details on cloning row using numpy.tile.这个答案https://stackoverflow.com/a/1582742/13326667详细介绍了使用 numpy.tile 克隆行。

>>> tile(array([1,2,3]), (3, 1))
array([[1, 2, 3],
       [1, 2, 3],
       [1, 2, 3]])

What is the purpose of (3,1) here? (3,1)这里的目的是什么？ Can someone explain what the 3 means and the 1 means?有人能解释一下3和1是什么意思吗？

Answer 1

3 is the number of times he have to clone it horizontally 3是他必须水平克隆它的次数

and 1 is the number of times he have to clone it vertically: 1是他必须垂直克隆它的次数：

for example if you have:例如，如果您有：

import numpy as np

tile = np.tile(
np.array([
    [1,2,3], #<- row 1 here
    [1,2,3]  #<- row 2 here
]),(2,2)
)
print(tile)

you would get the array, cloned 2 times vertically and 2 times horizontally:你会得到数组，垂直克隆 2 次，水平克隆 2 次：

[[1 2 3 1 2 3]
 [1 2 3 1 2 3]
 [1 2 3 1 2 3]
 [1 2 3 1 2 3]]