alexa A Graphical Aid to the Interpretation and Validation of Cluster Analysis
Environmental Sciences

Environmental Sciences

Journal of Pollution Effects & Control

Author(s): Peter Rousseeuw

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A new graphical display is proposed for partitioning techniques. Each cluster is represented by a so-called silhouette, which is based on the comparison of its tightness and separation. This silhouette shows which objects lie well within their cluster, and which ones are merely somewhere in between clusters. The entire clustering is displayed by combining the silhouettes into a single plot, allowing an appreciation of the relative quality of the clusters and an overview of the data configuration. The average silhouette width provides an evaluation of clustering validity, and might be used to select an ‘appropriate’ number of clusters.

This article was published in Journal of Computational and Applied Mathematics and referenced in Journal of Pollution Effects & Control

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