what is reachability plot how to plot cluster spanning trees why is an optics cluster called a reachability plot which graph is used to obtain the hierarchical structure of the optical cluster what is reachability plot in optics how to plot the reachability of the clusters define reachability plot how to plot an optical cluster what are the points that correspond in a reachability plot how do you plot clusters in matlab what is the use of the reachability plot in optical clustering what is reachability plot what is the reachability plot what is the plot for optics clustering how do you plot optical data what is reachability plot in optics explain how clustering works in physics how is reachability plot computed what is the difference between a reachability plot and a spanning plot what is the difference between a reachability plot and a hierarchical cluster in optics