Python NumPy - Return n Copies of Array Concatenated Along First Axis

By IncludeHelp Last updated : September 11, 2024

Problem statement

Given a NumPy array, write a Python program to return n copies of array concatenated along first axis.

Returning n copies of array concatenated along first axis

For this purpose, we will define a function which will take a 1-D numpy array arr and an integer n as input. Here, we will use numpy.tile() to tile the input array n times along the first axis and creates a new tiled array. Finally, we return the new array.

Python code to return n copies of array concatenated along first axis

Let us understand with the help of an example:

# Importing numpy
import numpy as np

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

# Defining values for n
n = 2

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

# Defining a function
def fun(arr,n):
    tiled_arr = np.tile(arr, (n, 1))
    return tiled_arr

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

Output

The output of the above program is:

Original array [1 2 3 4] 

Result:
 [[1 2 3 4]
 [1 2 3 4]]