A Combinatorial Approach to Assess the Separability of Clusters |
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Authors: | J Orestes Cerdeira M Jo?o Martins Pedro C Silva |
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Institution: | 1. Centro de Estudos Florestais (CEF), Instituto Superior de Agronomia, Technical University of Lisbon (TULisbon), Tapada da Ajuda, 1349-017, Lisboa, Portugal
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Abstract: | Separability of clusters is an issue that arises in many different areas, and is often used in a rather vague and subjective
manner. We introduce a combinatorial notion of interiority to derive a global view on separability of a set of entities. We
develop this approach further to evaluate the overall separability of a partition in the context of cluster analysis. Our
approach captures combinatorial and geometrical aspects of data and provides, in addition to numerical evaluations, graphical
representations particularly useful when data are not easily visualized. We illustrate the methodology on some real and simulated
datasets. |
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Keywords: | |
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