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

62 votes104 views3 answers
Python how to loop in a list
Python
16 votes99 views3 answers
Place a number randomly in a list python
Python
71 votes115 views6 answers
Shuffle array python
Python
0 vote105 views1 answer
ImportError: cannot import name 'Request' from 'urllib2' (unknown location)
Python
1 vote109 views3 answers
Python find string count in str
Python
0 vote99 views1 answer
Python get current class name
Python
0 vote112 views1 answer
Pil saves blue images
Python
0 vote101 views1 answer
Convert darkflow yolov3 tensorflow lite
Python
2 votes98 views1 answer
Create Pandas Data Frame in Python
Python
0 vote141 views1 answer
Cant import flask mail
Python Flask