Below are the few steps which may help you.
- Since pdist() accepts matrix as an argument, you should convert cell array to matrix using cell2mat function
- Find pair wise distances using pdist() function
- Count number of distances greater than r distance.
Example-
p={[1,2],[3,4],[5,6],[7,8]};
matrixP=cell2mat(p(:));
distance = pdist(matrixP);
sum(distance>3)
