A hierarchical mixture model for clustering three-way data sets
Computational Statistics & Data Analysis
A hierarchical modeling approach for clustering probability density functions
Computational Statistics & Data Analysis
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Recently, different mixture models have been proposed for multilevel data, generally requiring the local independence assumption. In this work, this assumption is relaxed by allowing each mixture component at the lower level of the hierarchical structure to be modeled according to a multivariate Gaussian distribution with a non-diagonal covariance matrix. For high-dimensional problems, this solution can lead to highly parameterized models. In this proposal, the trade-off between model parsimony and flexibility is governed by assuming a latent factor generative model.