Model-based cluster and discriminant analysis with the MIXMOD software |
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Authors: | Christophe Biernacki Gilles Celeux |
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Affiliation: | a UMR 8524, CNRS & Université de Lille 1, 59655 Villeneuve d’Ascq, France b INRIA Futurs, 91405 Orsay, France c UMR 6599, CNRS & Université de Technologie de Compiègne, 60205 Compiègne, France d UMR 6623, CNRS & Université de Franche-Comté, 25030 Besançon, France |
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Abstract: | The Mixture Modeling (MIXMOD) program fits mixture models to a given data set for the purposes of density estimation, clustering or discriminant analysis. A large variety of algorithms to estimate the mixture parameters are proposed (EM, Classification EM, Stochastic EM), and it is possible to combine these to yield different strategies for obtaining a sensible maximum for the likelihood (or complete-data likelihood) function. MIXMOD is currently intended to be used for multivariate Gaussian mixtures, and fourteen different Gaussian models can be distinguished according to different assumptions regarding the component variance matrix eigenvalue decomposition. Moreover, different information criteria for choosing a parsimonious model (the number of mixture components, for instance) are included, their suitability depending on the particular perspective (cluster analysis or discriminant analysis). Written in C++, MIXMOD is interfaced with SCILAB and MATLAB. The program, the statistical documentation and the user guide are available on the internet at the following address: http://www-math.univ-fcomte.fr/mixmod/index.php. |
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Keywords: | Gaussian models EM-like algorithms Model selection |
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