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

1 vote345 views1 answer
Python towers of hanoi recursive
Python
8 votes321 views3 answers
F.readlines python
Python
12 votes322 views6 answers
Python remove empty string from list
Python
0 vote375 views1 answer
Django loop through form errors
Python Django
0 vote348 views1 answer
How to make a window in pyga,e
Python
0 vote317 views1 answer
How to uninstall python-dotenv
Python
5 votes331 views3 answers
How to add images in hml while using flask
Python
0 vote342 views1 answer
Inspect last 5 rows of dataframe
Python
0 vote311 views1 answer
Pyhton apend to list
Python
61 votes339 views6 answers
Python classes
Python