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Abstract

The issue of determining ‘the right number of clusters’ is attracting ever growing interest. The paper reviews published work on the issue with respect to mixture of distributions, partition, especially in k-means clustering, and hierarchical cluster structures. Some perspective directions for further developments are outlined. © 2011 John Wiley & Sons, Inc. WIREs Data Mining Knowl Discov 2011 1 252–260 DOI: 10.1002/widm.15