Problem 59. Pattern matching

Solve Later

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

Last solution submitted on Jul 22, 2019

Last 200 Solutions

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1 Comment

1 Comment

Oleg Komarov on 28 Jan 2012

Not column, but row wise.

Solution Comments

Solution 1534182

1 Comment

1 Comment

William Moraga on 19 May 2018

this is actually pretty fun

Solution 1056854

1 Comment

1 Comment

Roche de Guzman on 19 Nov 2016

amazing:)

Solution 546456

1 Comment

1 Comment

Gergely Patay on 16 Dec 2014

I'm not proud of this solution, the scoring system is clearly flawed.

Solution 165375

1 Comment

1 Comment

Nicholas Howe on 20 Nov 2012

Seems like the filter preventing abuse of @eval needs some work!

Solution 158914

1 Comment

1 Comment

Claudia on 15 Nov 2012

Nice! I learned something from you.

Solution 128509

1 Comment

1 Comment

Farhad on 12 Sep 2012

This solution is wrong. It detects a common patten among any two rows and not just the first row and other rows.

Solution 27070

1 Comment

1 Comment

Cris Luengo on 16 Jul 2012

What is the point?

Problem 59. Pattern matching

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Problem 59. Pattern matching

Solution Stats

Last 200 Solutions

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Solution Comments

Recent Solvers1054

Suggested Problems

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