Question

How to create a matrix (2D array) using lists where each list is a column in the matrix with Python

Answer 1

import numpy as np

lst1 = [1, 2, 3]
lst2 = [4, 5, 6]
lst3 = [7, 8, 9]

arr = np.hstack((np.reshape(lst1, (len(lst1), 1)), 
                 np.reshape(lst2, (len(lst2), 1)), 
                 np.reshape(lst3, (len(lst3), 1))))

print(arr)





'''
run:

[[1 4 7]
 [2 5 8]
 [3 6 9]]

'''

 

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