How to reshape a 1D array into 2D and print Strides using NumPy?

Last update on March 26 2025 13:18:45 (UTC/GMT +8 hours)

2. 1D to 2D Reshape Strides

Write a NumPy program that reshapes a 1D array of 12 elements into a 2D array of shape (3, 4) and print its strides.

Sample Solution:

Python Code:

import numpy as np

# Create a 1D array of 12 elements
a = np.arange(12)

# Reshape the array into a 2D array of shape (3, 4)
reshaped_a = a.reshape((3, 4))

# Print the strides of the reshaped array
print("Strides of the reshaped array:", reshaped_a.strides)

Output:

Strides of the reshaped array: (16, 4)

Explanation:

• Import NumPy: Import the NumPy library to handle array operations.
• Create 1D array a: Define a 1D array a with 12 elements using np.arange(12).
• Reshape the array: Use the reshape() method to convert the 1D array into a 2D array of shape (3, 4).
• Print Strides: Print the strides of the reshaped array using the strides attribute.

For more Practice: Solve these Related Problems:

• Write a NumPy program to reshape a 1D array of 12 elements into a (4, 3) array and print its strides, then compare with the (3, 4) shape.
• Write a NumPy program to reshape a 1D array into a 2D array using Fortran order and display the resulting strides.
• Write a NumPy program to perform multiple reshaping operations on a 1D array and print the strides after each reshape.
• Write a NumPy program to verify that reshaping a 1D array into different 2D shapes preserves the underlying data pointer by comparing strides.

Python-Numpy Code Editor:

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