Finite Mixture Models

Finite Mixture Models

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An up-to-date, comprehensive account of major issues in finite mixture modeling This volume provides an up-to-date account of the theory and applications of modeling via finite mixture distributions. With an emphasis on the applications of mixture models in both mainstream analysis and other areas such as unsupervised pattern recognition, speech recognition, and medical imaging, the book describes the formulations of the finite mixture approach, details its methodology, discusses aspects of its implementation, and illustrates its application in many common statistical contexts. Major issues discussed in this book include identifiability problems, actual fitting of finite mixtures through use of the EM algorithm, properties of the maximum likelihood estimators so obtained, assessment of the number of components to be used in the mixture, and the applicability of asymptotic theory in providing a basis for the solutions to some of these problems. The author also considers how the EM algorithm can be scaled to handle the fitting of mixture models to very large databases, as in data mining applications. This comprehensive, practical guide: * Provides more than 800 references-40% published since 1995 * Includes an appendix listing available mixture software * Links statistical literature with machine learning and pattern recognition literature * Contains more than 100 helpful graphs, charts, and tables Finite Mixture Models is an important resource for both applied and theoretical statisticians as well as for researchers in the many areas in which finite mixture models can be used to analyze data.If H is discrete, with 9 points of support, then f (yj; H) is a g-component mixture model. ... He showed that finding the MLE involved a standard problem of convex optimization, that of maximizing a concave function over a convex set. ... algorithm or it can be used in combination with the EM algorithm (Laird, 1978) or other general-purpose algorithms (Bohning, 1995). ... A common example of such a model is a GLM in which a random intercept term is introduced into the linear predictor toanbsp;...

Title:Finite Mixture Models
Author:Geoffrey McLachlan, David Peel
Publisher:John Wiley & Sons - 2004-04-05


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