How to delete element in NumPy array

You can delete an element in the NumPy array with the following code. If you want to learn Python, I highly recommend reading This Book.

Example 1

import numpy as np

a = np.array([5, 10, 15, 20, 25, 30, 35, 40])
index = [2, 4, 5]

b = np.delete(a, index)
print(b)

Python
​x
 
import numpy as np​a = np.array([5, 10, 15, 20, 25, 30, 35, 40])index = [2, 4, 5]​b = np.delete(a, index)print(b)

[ 5 10 20 35 40]

import numpy as np
a = np.array([5, 10, 15, 20, 25, 30, 35, 40])
b = np.array([15,25,30])

c = np.setdiff1d(a,b)
print(c)

Python
 
import numpy as npa = np.array([5, 10, 15, 20, 25, 30, 35, 40])b = np.array([15,25,30])​c = np.setdiff1d(a,b)print(c)

[ 5 10 20 35 40]

a = np.array([5, 10, 15, 20, 25, 30, 35, 40])

b = np.delete(a, [2,4,5])
print(b)

Python
 
a = np.array([5, 10, 15, 20, 25, 30, 35, 40])​b = np.delete(a, [2,4,5])print(b)

[ 5 10 20 35 40]

import numpy as np
a = np.array([[1,2,3],[4,5,6]])

b = np.delete(a, [2,5])
print(b)

Python
 
import numpy as npa = np.array([[1,2,3],[4,5,6]])​b = np.delete(a, [2,5])print(b)

[1 2 4 5]