How to repeat each element of a NumPy array 5 times?

Learn, how to repeat each element of a NumPy array 5 times?
By Pranit Sharma Last updated : December 26, 2023

Problem statement

Suppose that we are given a numpy array and we need to repeat each of its elements 5 times with the array itself.

For example, if we have an array as [1,2,3,4], we need the output as [1,1,1,1,1,2,2,2,2,2,3,3,3,3,3,4,4,4,4,4].

Repeating each element of a NumPy array 5 times

To repeat each element of a numpy array 5 times, we can use the numpy.repeat() function which is used to repeat the elements of an array N number of times, where N is the parameter, it accepts.

We can also repeat the whole array N number of times. For that purpose, we can use the numpy tile() function.

Let us understand with the help of an example,

Python code to repeat each element of a NumPy array 5 times

# Import numpy
import numpy as np

# Creating a numpy array
arr = np.array([1,2,3,4,5])

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

# Repeating each element 5 times
res = np.repeat(arr,5)

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