Assessing a Mixture Model for Clustering with the Integrated Completed Likelihood
IEEE Transactions on Pattern Analysis and Machine Intelligence
Modelling high-dimensional data by mixtures of factor analyzers
Computational Statistics & Data Analysis
Robust Cluster Analysis via Mixtures of Multivariate t-Distributions
SSPR '98/SPR '98 Proceedings of the Joint IAPR International Workshops on Advances in Pattern Recognition
Enhanced Model-Based Clustering, Density Estimation,and Discriminant Analysis Software: MCLUST
Journal of Classification
Extension of the mixture of factor analyzers model to incorporate the multivariate t-distribution
Computational Statistics & Data Analysis
Parsimonious Gaussian mixture models
Statistics and Computing
Interactive and Dynamic Graphics for Data Analysis With R and GGobi
Interactive and Dynamic Graphics for Data Analysis With R and GGobi
Computational Statistics & Data Analysis
Dimension reduction for model-based clustering
Statistics and Computing
Extending mixtures of multivariate t-factor analyzers
Statistics and Computing
Initializing the EM algorithm in Gaussian mixture models with an unknown number of components
Computational Statistics & Data Analysis
Computational aspects of fitting mixture models via the expectation-maximization algorithm
Computational Statistics & Data Analysis
A novel classification learning framework based on estimation of distribution algorithms
International Journal of Computing Science and Mathematics
Clustering and classification via cluster-weighted factor analyzers
Advances in Data Analysis and Classification
Dimension reduction for model-based clustering via mixtures of multivariate $$t$$t-distributions
Advances in Data Analysis and Classification
Editorial: The 2nd special issue on advances in mixture models
Computational Statistics & Data Analysis
Model-based clustering via linear cluster-weighted models
Computational Statistics & Data Analysis
Parsimonious skew mixture models for model-based clustering and classification
Computational Statistics & Data Analysis
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A novel model-based classification technique is introduced based on mixtures of multivariate t-distributions. A family of four mixture models is defined by constraining, or not, the covariance matrices and the degrees of freedom to be equal across mixture components. Parameters for each of the resulting four models are estimated using a multicycle expectation-conditional maximization algorithm, where convergence is determined using a criterion based on the Aitken acceleration. A straightforward, but very effective, technique for the initialization of the unknown component memberships is introduced and compared with a popular, more sophisticated, initialization procedure. This novel four-member family is applied to real and simulated data, where it gives good classification performance, even when compared with more established techniques.