How to concatenate arrays in NumPy

You can concatenate 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, 20]])
b = np.array([[50, 100]])
print(np.concatenate((a, b), axis=0))

Output

[[  5  10]
 [ 15  20]
 [ 50 100]]

import numpy as np
a = np.array([[5, 10], [15, 20]])
b = np.array([[50, 100]])
print(np.concatenate((a, b.T), axis=1))

Output

[[  5  10  50]
 [ 15  20 100]]

import numpy as np
a = np.array([[5, 10], [15, 20]])
b = np.array([[50, 100]])
print(np.concatenate((a, b), axis=None))

Output

[  5  10  15  20  50 100]