Given a matrix, m-by-n, find all the rows that have the same "increase, decrease, or stay same" pattern going across the columns as the first row does. Do not list the row as a match to itself.

Example:

 Input  a = [1 2 3 0
             5 6 7 9
             2 7 8 7]
 Output b is 3

since the third column follows the increase-increase-decrease pattern used in vector a.

Solve

Solution Stats

6509 Solutions

2821 Solvers

Last Solution submitted on Apr 27, 2026

Last 200 Solutions

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers2821

bao Brady R. Osterstock Lorenzo Kailyn Montez

Suggested Problems

More from this Author96

Problem Tags

Community Treasure Hunt

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

Start Hunting!