Clustering. Sunita Sarawagi http://www.it.iitb.ac.in/~sunita. Outline. What is Clustering Similarity measures Clustering Methods Summary References. What Is Good Clustering?. A good clustering method will produce high quality clusters with high intra-class similarity
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where i = (xi1, xi2, …, xip) and j = (xj1, xj2, …, xjp) are two p-dimensional data objects, and q is a positive integer
dij(f) = 0 if xif = xjf , or dij(f) = 1 o.w.
b d e
a b c d e
A Dendrogram Shows How the Clusters are Merged Hierarchically