Problem 1678. Count consecutive 0's in between values of 1

Created by Chris E.

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So you have some vector that contains 1's and 0's, and the goal is to return a vector that gives the number of 0's between each one. for example:

Input = [0 1 0 0 0 1 0 1 1 1 0 0 0 1 0 1 1 0 0]

Output = [1 3 1 0 0 3 1 0 2]

Solve

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Last solution submitted on Oct 17, 2019

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2 Comments

shahriar memaran on 23 Mar 2017

My opinion is that the answers for this problem are wrong. The problem is asking for counting zeros between values 1. So for example for Input = [0 1 0 0 0 1 0 1 1 1 0 0 0 1 0 1 1 0 0] the correct Output is [3 1 0 0 3 1 0] and not [1 3 1 0 0 3 1 0 2]. Reasoning that there is no 1 at the beginning and at the end of the vector and so the beginning and end zeros should not be counted.

yurenchu on 15 Apr 2017

How about adding a test case in which vector x starts with a 1, such as x = [1 0 0 1 0] ? (Several of the submitted/approved solutions would give the answer as y = [0 2 1] instead of y = [2 1] . )

Solution Comments

Solution 268568

1 Comment

1 Comment

J.R.! Menzinger on 27 Jun 2013

I was looking for this solution:
http://www.mathworks.de/matlabcentral/cody/problems/1678-count-consecutive-0-s-in-between-values-of-1/solutions/267945
but I was not precise enough with the regexp... ;-)

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Problem 1678. Count consecutive 0's in between values of 1

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Problem 1678. Count consecutive 0's in between values of 1

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