How to find the second zero element in an array?

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!

Answer 1

[Mohammad Abouali]

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

[Leo Müller]

Thank you, this is what I was looking for!