How to find the second zero element in an array?

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Leo Müller 2015-11-11

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https://ww2.mathworks.cn/matlabcentral/answers/254303-how-to-find-the-second-zero-element-in-an-array

评论： Leo Müller 2015-11-11

Hello, I have the following problem: I would like to find the second non zero element in an array such as: array = [ 0 138 49 47 0 0 0 0] What I want is the index 5. Thank you for your help!

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Answer 1

Mohammad Abouali 2015-11-11

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https://ww2.mathworks.cn/matlabcentral/answers/254303-how-to-find-the-second-zero-element-in-an-array#answer_199393

编辑：Mohammad Abouali 2015-11-11

在 MATLAB Online 中打开

index 5 is zero? You said you are looking for non-zero?!!!

anyway you can use find().

something like this:

myArray=[ 0 138 49 47 0 0 0 0];
idx=find(myArray==0,2,'first');
if (numel(idx)<2)
  error('less than 2 elements were found');
end
idx=idx(end)
idx =
       5