Problem 1448. Create Volcano (or Atoll) martix. It is an extension of Bullseye matrix problem.

Created by Chintan

Solve Later

For example, if n=2 (maximum value), the output matrix should be
 [1 1 1 1 1;
  1 2 2 2 1;
  1 2 1 2 1;
  1 2 2 2 1;
  1 1 1 1 1]
where you go from inside to outside starting from 1 to 2(maximum value) and again move back from 2 to 1.

Solve

Solution Stats

434 Solutions
143 Solvers

Last Solution submitted on Aug 12, 2025

Last 200 Solutions

Problem Comments

3 Comments

3 Comments

Ned Gulley on 24 Apr 2013

You should call this a volcano matrix!

Richard Zapor on 27 Apr 2013

Could also be named an Atoll matrix

Chintan on 27 Apr 2013

Thanks Ned, Richard for good suggestion. I have changed Problem Title accordingly.

Solution Comments

Show comments

Problem Recent Solvers143

Problem Tags

Community Treasure Hunt

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

Start Hunting!

Problem 1448. Create Volcano (or Atoll) martix. It is an extension of Bullseye matrix problem.

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers143

Suggested Problems

More from this Author10

Problem Tags

Community Treasure Hunt

Problem 1448. Create Volcano (or Atoll) martix. It is an extension of Bullseye matrix problem.

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers143

Suggested Problems

More from this Author10

Problem Tags

Community Treasure Hunt

Players