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	ロバスト階層的クラスタリング	混合モデル (Mixture Modeling)
分野	統計学	統計学
系統	Latent structure	Latent structure
提唱年	1990	1894
提唱者	Kaufman & Rousseeuw (building on Ward, 1963 and others)	Karl Pearson
種類	Robust unsupervised clustering	Latent variable / density estimation
原典	Kaufman, L. & Rousseeuw, P. J. (1990). Finding Groups in Data: An Introduction to Cluster Analysis. Wiley. ISBN: 978-0471878766	McLachlan, G. J. & Peel, D. (2000). Finite Mixture Models. Wiley-Interscience. ISBN: 978-0471006268
別名	robust agglomerative clustering, outlier-resistant hierarchical clustering, robust linkage clustering, RHC	finite mixture model, mixture distribution model, FMM, model-based clustering
関連	5	6
概要	Robust hierarchical clustering extends classical agglomerative or divisive hierarchical clustering by replacing sensitive distance measures and linkage criteria with outlier-resistant alternatives, preserving cluster structure even when data contain anomalous observations or heavy-tailed distributions.	Mixture modeling assumes that a population is composed of K unobserved subpopulations, each described by its own probability distribution. The observed data are treated as draws from a weighted combination of these component distributions. It provides a principled, model-based alternative to ad hoc clustering and supports formal comparison of solutions with different numbers of components.