Cluster Analysis

From a drop of water, a logician could infer the possibility of an Atlantic or a Niagara without having seen or heard of one or the other. So all life is a great chain, the nature of which is known whenever we are shown a single link of it. Sherlock Holmes in “Study in Scarlet” When considering groups of objects in a multivariate data set, two situations can arise. Given a data set containing measurements on individuals, in some cases we want to see if some natural groups or classes of individuals exist, and in other cases, we want to classify the individuals according to a set of existing groups. Cluster analysis develops tools and methods concerning the former case, that is, given a data matrix containing multivariate measurements on a large number of individuals (or objects), the objective is to build subgroups or clusters of individuals. This is done by grouping individuals that are “similar” according to some appropriate criterion.


Single Linkage Complete Linkage Crime Data Ward Method Auto Theft 
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© Springer Science+Business Media, LLC 2007

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