MATLAB: How to find out zeros and their indices in a matrix

findzeros

I have an input matrix of size 3*13 double:
input=[0 0 1 0 0 0 1 1 1 0 0 0 0;
       0 1 0 0 1 1 0 0 0 1 0 1 0;
       0 1 1 1 1 0 0 0 1 0 0 1 0];
I want to know how many zeros subsequently have in 
input(2,:)
The output should be:
output=[1 2 3 1 1];
I also want to know their starting index of zeros. It should look like:
index=[1 3 7 11 13];
How can i solve this problem?

Best Answer

v=input(2,:)>0; % remove >0 if your matrix contains only 0 or 1
d = diff([1, v, 1]);
index = find(d==-1)
output = find(d==1)-index
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