How to append two arrays in NumPy

You can append two arrays in the NumPy with the following code. If you want to learn Python, I highly recommend reading This Book.

Example 1

import numpy as np

a = np.array([5, 10, 15])
b = np.array([1, 2, 3])

c = np.append(a, b)
print(c)

Output

[ 5 10 15  1  2  3]

import numpy as np

a = np.array([[5, 10, 15],[20, 25, 30]])
b = np.array([[1, 2, 3],[4, 5, 6]])

c = np.append(a, b)
print(c)

[ 5 10 15 20 25 30  1  2  3  4  5  6]

import numpy as np

a = np.array([[5, 10, 15],[20, 25, 30]])
b = np.array([[1, 2, 3],[4, 5, 6]])

c = np.append(a, b,axis=0)
print(c)

[[ 5 10 15]
 [20 25 30]
 [ 1  2  3]
 [ 4  5  6]]

import numpy as np

a = np.array([[5, 10, 15],[20, 25, 30]])
b = np.array([[1, 2, 3],[4, 5, 6]])

c = np.append(a, b,axis=1)
print(c)

[[ 5 10 15  1  2  3]
 [20 25 30  4  5  6]]