Add a new column to numpy array

Numpy add new column

: import numpy as np
: N = 3
: A = np.eye(N)

: np.c_[ A, np.ones(N) ]              # add a column
array([[ 1.,  0.,  0.,  1.],
       [ 0.,  1.,  0.,  1.],
       [ 0.,  0.,  1.,  1.]])

Source: stackoverflow.com

Append a zeros column numpy

np.concatenate((np.zeros((3,3), dtype=int), arr), axis=1)
array([[0, 0, 0, 1, 2, 3],
       [0, 0, 0, 4, 5, 6],
       [0, 0, 0, 7, 8, 9]])

Source: stackoverflow.com

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

Numpy add one column

an_array = np.append(an_array, new_column, axis=1)

Source: kite.com

Similar codes

0 vote219 views1 answer
String + string in python
Python
9 votes232 views2 answers
Get a list of all files python
Python
40 votes237 views6 answers
Pandas reset index
Python
0 vote239 views1 answer
If settings.debug
Python
1 vote224 views1 answer
What is Python's dynamic type system
Python
0 vote210 views1 answer
Python long numbers as string
Python
0 vote265 views1 answer
Python randomly chose user agent
Python
0 vote232 views2 answers
Terneray operator in python
Python
0 vote219 views1 answer
1. write a program to multiply two numbers using function python
Python
4 votes239 views1 answer
Tkinter frame example
Python