Problem 42922. Zero Cross

Created by Abdullah Caliskan
Appears in Indexing V

Difficulty:Rate

Solve Later
Add To GroupÃ‚

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

265 Solutions
124 Solvers

Last Solution submitted on Apr 06, 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

FEATURED DISCUSSION

PIVlab surpasses 100K all-time File Exchange downloads

During the past twelve months, PIVlab, a MATLAB Community Toolbox for particle...

Mike Croucher in General

View Post

FEATURED DISCUSSION

LLMs with MATLAB updated to support the latest OpenAI Models

Large Languge model with MATLAB, a free add-on that lets you access...

Toshiaki Takeuchi in Generative AI

View Post

Problem Recent Solvers124

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

PIVlab surpasses 100K all-time File Exchange downloads

LLMs with MATLAB updated to support the latest OpenAI Models

Problem Recent Solvers124

Suggested Problems

More from this Author21

Problem Tags

Community Treasure Hunt

Problem 42922. Zero Cross

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

PIVlab surpasses 100K all-time File Exchange downloads

LLMs with MATLAB updated to support the latest OpenAI Models

Problem Recent Solvers124

Suggested Problems

More from this Author21

Problem Tags

Community Treasure Hunt

Players