MATLAB: Distance between randomly selected nodes

distance between two randomly selected nodes

for i=1:1:n
temp_rand=rand;
if(temp_rand<= some condition)
            count_n=count_n+1;
            S(i).type='C';
            C(cc).xd=S(i).xd;
            C(cc).yd=S(i).yd;
            plot(S(i).xd,S(i).yd,'*');
            cc=cc+1;
In the above code some nodes are selected from randomly distributed nodes which satisfy the temp_rand condition. Please anyone help me how to find out distance between these randomly nodes only.

Best Answer

xt = [CC.xd]; yt = [CC.yd]; 
distances = squareform( pdist([xt(:), yt(:)]) );
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