Model-Based Gaussian and Non-Gaussian Clustering

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ID: 290552
1993
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Abstract
Abstract : The classification maximum likelihood approach is sufficiently general to encompass many current clustering algorithms, including those based on the sum of squares criterion and on the criterion of Friedman and Rubin (1967). However, as currently implemented, it does not allow the specification of which features (orientation, size and shape) are to be common to all clusters and which may differ between clusters. Also, it is restricted to Gaussian distributions and it does not allow for noise. We propose ways of overcoming these limitations. A reparameterization of the covariance matrix allows us to specify that some features, but not all, be the same for all clusters. A practical framework for non-Gaussian clustering is outlined, and a means of incorporating noise in the form of a Poisson process is described. An approximate Bayesian method for choosing the number of clusters is given. The performance of the proposed methods is studied by simulation, with encouraging results. The methods are applied to the analysis of a data set arising in the study of diabetes, and the results seem better than those of previous analyses. (RH)
Reference Key
openalex_W2082503527 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Jeffrey D. Banfield, Adrian E. Raftery
Journal biometrics
Year 1993
DOI
10.2307/2532201
URL
https://doi.org/10.2307/2532201
Keywords Keywords not found

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