How to add column to np array

x1= data[:,:-1]
x = np.insert(x1, index(0), values=1, axis=1)
#to add a column of 1's in the features matrix

Add a new column to numpy array

import numpy as np
N = 10
a = np.random.rand(N,N)
b = np.zeros((N,N+1))
b[:,:-1] = a

Source: stackoverflow.com

Add column to existing numpy array

b = np.insert(a, insert_index, values=a[:,2], axis=1)

Source: stackoverflow.com

Add column array python

>>> a = np.array([[1,2,3],[2,3,4]])
>>> a
array([[1, 2, 3],
       [2, 3, 4]])

>>> z = np.zeros((2,1), dtype=int64)
>>> z
array([[0],
       [0]])

>>> np.append(a, z, axis=1)
array([[1, 2, 3, 0],
       [2, 3, 4, 0]])

Similar codes

65 votes367 views5 answers
Python version check in cmd
Python
2 votes302 views1 answer
How to get the list of discord server members?
Python
0 vote304 views1 answer
Maior valor lista python
Python
0 vote349 views6 answers
Virtualenv
Python
0 vote317 views1 answer
How to username in python?
Python
0 vote303 views1 answer
Deine dict with same values
Python
0 vote313 views1 answer
Download image from url selenium python
Python
-3 votes303 views1 answer
Buuya
Python
0 vote299 views1 answer
Install python package from git colab
Python
15 votes322 views2 answers
Python check if variable is string
Python