Pattern matching - MATLAB Cody - MATLAB Central

Problem 59. Pattern matching

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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

52.76% Correct | 47.24% Incorrect
Last Solution submitted on Mar 01, 2025

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Primes and Rough Numbers, Basic ideas
What is a rough number? What can they be used...
John D'Errico in Tips & Tricks
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