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

If you need an array with two columns you can use column_stack:

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

Which results

[[ 1 11]
 [ 2 12]
 [ 3 13]
 [ 4 14]
 [ 5 15]
 [ 6 16]
 [ 7 17]
 [ 8 18]
 [ 9 19]]