Problem 43801. Union Jack Matrix

  • Created by JD

Create a matrix of odd dimensions that has ones on both diagonals and dividing the matrix into 4 quadrants, resembling a square union jack flag. For example, if n=11:

1  0  0  0  0  1  0  0  0  0  1
0  1  0  0  0  1  0  0  0  1  0
0  0  1  0  0  1  0  0  1  0  0
0  0  0  1  0  1  0  1  0  0  0
0  0  0  0  1  1  1  0  0  0  0
1  1  1  1  1  1  1  1  1  1  1
0  0  0  0  1  1  1  0  0  0  0
0  0  0  1  0  1  0  1  0  0  0
0  0  1  0  0  1  0  0  1  0  0
0  1  0  0  0  1  0  0  0  1  0
1  0  0  0  0  1  0  0  0  0  1
Solve

Solution Stats

65.71% Correct | 34.29% Incorrect
Last Solution submitted on Dec 21, 2025

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers102

Suggested Problems

More from this Author11

Problem Tags

ones matrix union jack

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!