How to create and flatten a 2D NumPy array using ravel()?

Last update on December 21 2024 07:36:40 (UTC/GMT +8 hours)

Write a NumPy program to create a 2D array of shape (4, 4), then use ravel() to flatten it and print the result.

Sample Solution:

Python Code:

import numpy as np

# Create a 2D array of shape (4, 4)
array_2d = np.array([[1, 2, 3, 4],
                     [5, 6, 7, 8],
                     [9, 10, 11, 12],
                     [13, 14, 15, 16]])

# Use ravel() to flatten the 2D array
flattened_array = array_2d.ravel()

# Print the flattened array
print(flattened_array)

Output:

[ 1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16]

Explanation:

• Import NumPy library: We start by importing the NumPy library which provides support for large multi-dimensional arrays and matrices.
• Create a 2D array: We create a 2D array array_2d of shape (4, 4) using np.array().
• Flatten the array: We use the ravel() method to flatten array_2d into a 1D array, stored in flattened_array.
• Print the result: Finally, we print the flattened array.

Python-Numpy Code Editor: