How to store E_dist?

I have calculated the Euclidean distance between a query image and images in the database and stored it in a array named as E_dist .Now I have compared those values in the array E_dist with the threshold and it returns the values which are lesser than the threshold .How to store those returned values. for k1=1:70 if(E_distym(k1)<17) disp(E_distym(k1)); end end