Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1146155 | Journal of Multivariate Analysis | 2010 | 11 Pages |
Abstract
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.
Related Topics
Physical Sciences and Engineering
Mathematics
Numerical Analysis
Authors
Daniela G. Calò, Cinzia Viroli,