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

0 vote229 views1 answer
Flask multuple parameters
Python Flask
6 votes212 views3 answers
Download image from url python 3
Python
0 vote234 views1 answer
Standard destructuring assignments in python
Python
1 vote178 views1 answer
Python how to say hello world
Python
0 vote202 views5 answers
Pine script to python
Python
0 vote196 views1 answer
Filtering certain rows in python that contains a part of string
Python
9 votes205 views1 answer
Delete model object django
Python
0 vote196 views1 answer
Python ignore unicodedecodeerror
Python
14 votes242 views3 answers
Python check if number is integer or float
Python
103 votes187 views2 answers
How to take input of something in python
Python