MATLAB: How to count the number of 1 between two 0 in a vector

count onevector

I have this vector:
[0 1 1 1 0 0 1 0 1 1 0 1]
I want to create a vector that every time that I have 1 or more consecutive 1 it counts the number of 1 between two zero. So the results must be:
[3 1 2 1]
How can I do that?
thanks

Best Answer

In both methods below,
A is the input vector (row or column)
B is the output vector of consecutive 1 counts, row vector.
Method 1 assumes the vector only contains 1s and 0s
A = [0 1 1 1 0 0 1 0 1 1 0 1];
B = diff(find([0,A(:).',0]==0))-1; 
B(B==0) = [];
Method 2 counts consecutive 1s, other elements can take any numeric value. 
A = [0 1 1 1 0 0 1 0 1 1 0 1];
dA = diff([0,A(:).',0]==1);
B = find(dA==-1)-find(dA==1)
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