An EM Algorithm for the Student-t Cluster-Weighted Modeling

  • Salvatore Ingrassia
  • Simona C. Minotti
  • Giuseppe Incarbone
Conference paper
Part of the Studies in Classification, Data Analysis, and Knowledge Organization book series (STUDIES CLASS)


Cluster-Weighted Modeling is a flexible statistical framework for modeling local relationships in heterogeneous populations on the basis of weighted combinations of local models. Besides the traditional approach based on Gaussian assumptions, here we consider Cluster Weighted Modeling based on Student-t distributions. In this paper we present an EM algorithm for parameter estimation in Cluster-Weighted models according to the maximum likelihood approach.


Local Model Conditional Density Finite Mixture Gaussian Case Gaussian Assumption 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Salvatore Ingrassia
    • 1
  • Simona C. Minotti
    • 2
  • Giuseppe Incarbone
    • 1
  1. 1.Dipartimento di Impresa, Culture e SocietàUniversità di CataniaCataniaItaly
  2. 2.Dipartimento di StatisticaUniversità di Milano-BicoccaMilanoItaly

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