Numpy的数组合并函数vstack、hstack

目录

一、hstack()

二、vatack()

---

一、hstack()

#vertical stack (类似于垂直合并)

import numpy as np

a = np.array([[1, 2, 3, 4], [5, 6, 7, 8]])
b = np.array([[1, 2, 9, 10], [5, 6, 7, 8]])

a
>>>
[[1 2 3 4]
 [5 6 7 8]]
b
>>>
[[ 1  2  9 10]
 [ 5  6  7  8]]

c = np.vatack(a, b)

c
>>>
[[ 1  2  3  4]
 [ 5  6  7  8]
 [ 1  2  9 10]
 [ 5  6  7  8]]

二、vatack()

#vertical stack (类似于水平合并）

import numpy as np

a = np.array([[1, 2, 3, 4], [5, 6, 7, 8]])
b = np.array([[1, 2, 9, 10], [5, 6, 7, 8]])

a
>>>
[[1 2 3 4]
 [5 6 7 8]]
b
>>>
[[ 1  2  9 10]
 [ 5  6  7  8]]

c = np.hatack(a, b)

c 
>>>
[[ 1  2  3  4  1  2  9 10]
 [ 5  6  7  8  5  6  7  8]]