How to remove specific elements from a NumPy array?

Learn, how to remove specific elements from a NumPy array? By Pranit Sharma Last updated : October 08, 2023

NumPy is an abbreviated form of Numerical Python. It is used for different types of scientific operations in python. Numpy is a vast library in python which is used for almost every kind of scientific or mathematical operation. It is itself an array which is a collection of various methods and functions for processing the arrays.

Problem statement

Suppose we are given a NumPy array with 10 elements and we need to delete some specific elements from this array (say 3,5,8).

Removing specific elements from a NumPy array

For this purpose, we will use numpy.delete() method. This method returns a new array with sub-arrays along an axis deleted.

To delete some specific elements from an array, we will pass the list of indices of those elements which we want to remove.

Let us understand with the help of an example,

Python program to remove specific elements from a NumPy array

# Import numpy
import numpy as np

# Import pandas
import pandas as pd

# Creating a numpy array
arr = np.array([1, 2, 3, 4, 5, 6, 7, 8, 9,10])

# Display original array
print("Original array:\n",arr,"\n")

# Defining a list of indices
ind = [3,5,8]

# Deleting specific elements
res = np.delete(arr,ind)

# Display result
print("Result:\n",res,"\n")

Output

The output of the above program is:

Example: How to remove specific elements from a NumPy array?

Python NumPy Programs »

How to delete a batch of rows of a NumPy array simultaneously?

Stack summing vectors to numpy 3d array