Whenever we cluster we should check the cluster quality but how can we do this ? One of the way to do that is to calculate it's Global Silhouette. It works pretty well for most clustering algorithms.
The basic idea behind global silhouette is what is the quality of separation between the points in one cluster to another cluster's points.
The basic idea behind global silhouette is what is the quality of separation between the points in one cluster to another cluster's points.
Below is the matlab code for it which uses silhouette() function from matlab .
If you need the code for silhouette or how to calculate s(i) for each data point e-mail me.
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