Problem 42922. Zero Cross

Created by Abdullah Caliskan

Solve Later

Write a function that counts the number of times n a signal x changes sign.

Examples

 x = [1 2 -3 -4 5 6 -7 8 -9 10 11]
 n = 6

 x = [1 2 -3]
 n = 1

Solve

Solution Stats

266 Solutions
125 Solvers

Last Solution submitted on Sep 21, 2025

Last 200 Solutions

Problem Comments

2 Comments

2 Comments

Jan Orwat on 27 Aug 2016

It would be beneficial for the problem if zeros were added to test cases, for example [...,1,2,0,-1,-2,...], [...,1,2,3,0,2,3,...], [...1,2,3,0,0,0,1,2,...], [...,1,2,0,0,-1,-2,...], etc.

goc3 on 23 May 2018

Additional test cases have been added and the description slightly modified.

Solution Comments

Show comments

Problem Recent Solvers125

Problem Tags

Community Treasure Hunt

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

Start Hunting!

Problem 42922. Zero Cross

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers125

Suggested Problems

More from this Author21

Problem Tags

Community Treasure Hunt

Problem 42922. Zero Cross

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers125

Suggested Problems

More from this Author21

Problem Tags

Community Treasure Hunt

Players