Concatenation of 2 1D `numpy` Arrays Along 2nd Axis

Question

Executing

import numpy as np
t1 = np.arange(1,10)
t2 = np.arange(11,20)

t3 = np.concatenate((t1,t2),axis=1)

results in a

Trac         


        

Answer 1

This is because you need to change it into two dimensions because one dimesion cannot concatenate with. By doing this you can add an empty column. It works if you run the following code:

import numpy as np 
t1 = np.arange(1,10)[None,:]
t2 = np.arange(11,20)[None,:]
t3 = np.concatenate((t1,t2),axis=1)
print(t3)