For a positive integer n, return an nXn matrix mat such that the value of each element in row i and column j is given according to the following rules:

  • i - j, if i > j
  • j - i, if i < j
  • 0, if i equals j

If n is not a positive integer, mat should be an empty matrix.

Examples:

Input:  n   = 4
Output: mat = [0  1  2  3
               1  0  1  2
               2  1  0  1
               3  2  1  0]

Input:  n   = -2
Output: mat = []

Input:  n   = 2.5
Output: mat = []
Solve

Solution Stats

339 Solutions

162 Solvers

Last Solution submitted on Sep 03, 2025

Last 200 Solutions

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers162

Peter Rottinger UG NAGAOKA Ankitkumar Ratan

Suggested Problems

More from this Author25

Problem Tags

Community Treasure Hunt

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

Start Hunting!