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

5 votes214 views2 answers
Selenium driver wait python
Python
-1 vote207 views2 answers
Dataframe multiindex
Python
0 vote221 views1 answer
Python f string thousand separator
Python
0 vote219 views1 answer
Numpy if zero is present
Python
0 vote221 views1 answer
@tf.function
Python
0 vote228 views1 answer
Get text content dynamo civil 3d
Python
10 votes221 views5 answers
Pandas to list of dicts
Python
-3 votes220 views6 answers
Python 3.8 release date
Python
1 vote201 views1 answer
Set size of button tkinter
Python
0 vote219 views1 answer
Add comma to csv in pandas
Python