Problem 42922. Zero Cross

Abdullah Caliskan

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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

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305 Solutions

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Last Solution submitted on Jun 30, 2026

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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.

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