NumPy: Create two arrays of size bigger and smaller than a given array
Resize Array to Bigger and Smaller Sizes
Write a NumPy program to create two arrays bigger and smaller than a given array.
Sample Solution:
Python Code:
# Importing the NumPy library and aliasing it as 'np'
import numpy as np
# Creating a 4x4 array 'x' with elements from 0 to 15 using np.arange() and reshaping it to a 4x4 array
x = np.arange(16).reshape(4, 4)
# Printing a message indicating the original array will be displayed
print("Original array:")
# Displaying the original 4x4 array 'x'
print(x)
# Printing a message indicating the creation of a 2x2 array from the original array
print("\nArray with size 2x2 from the original array:")
# Creating a new 2x2 array 'new_array1' using np.resize() from the original array 'x'
new_array1 = np.resize(x, (2, 2))
# Displaying the new 2x2 array 'new_array1'
print(new_array1)
# Printing a message indicating the creation of a 6x6 array from the original array
print("\nArray with size 6x6 from the original array:")
# Creating a new 6x6 array 'new_array2' using np.resize() from the original array 'x'
# The elements will be repeated if necessary to fill the new size
new_array2 = np.resize(x, (6, 6))
# Displaying the new 6x6 array 'new_array2'
print(new_array2)
Sample Output:
Original arrays: [[ 0 1 2 3] [ 4 5 6 7] [ 8 9 10 11] [12 13 14 15]] Array with size 2x2 from the said array: [[0 1] [2 3]] Array with size 6x6 from the said array: [[ 0 1 2 3 4 5] [ 6 7 8 9 10 11] [12 13 14 15 0 1] [ 2 3 4 5 6 7] [ 8 9 10 11 12 13] [14 15 0 1 2 3]]
Explanation:
x = np.arange(16).reshape(4, 4): Create a 1D NumPy array of integers from 0 to 15 using np.arange(16), and then reshape it into a 4x4 2D array using np.reshape().
new_array1 = np.resize(x, (2, 2)): Resize the 4x4 2D array x to a 2x2 2D array using np.resize(). The function takes the input array and the desired shape as arguments.
new_array2 = np.resize(x, (6, 6)): Resize the 4x4 2D array x to a 6x6 2D array using np.resize().
Pictorial Presentation:
Python-Numpy Code Editor: