How to add column to numpy array

Question

I am trying to add one column to the array created from recfromcsv. In this case it\'s an array: [210,8] (rows, cols).

I want to add a nint

Answer 1

It can be done like this:

import numpy as np

# create a random matrix:
A = np.random.normal(size=(5,2))

# add a column of zeros to it:
print(np.hstack((A,np.zeros((A.shape[0],1)))))

In general, if A is an m*n matrix, and you need to add a column, you have to create an n*1 matrix of zeros, then use "hstack" to add the matrix of zeros to the right of the matrix A.