On June 19th 2015, 11.30h at Dipartimento di Statistica e Metodi Quantitativi

Sala del Consiglio (edificio U7, 4° piano, 4064) Via Bicocca degli Arcimboldi, 8 – 20126 Milano

Agustín Mayo-Iscar - Universidad de Valladolid and IMUVA will give a talk on

“Robust model-based clustering and mixture modeling by using trimming and restrictions”

Abstract

The use of trimming procedures is common in many statistical settings to achieve

robustness against outlying observations. Notably, to obtain robustness in model-based

clustering and mixture modeling, the only adoption of trimming is not enough. Constraints

on the scatters, corresponding to the clusters or to the mixture components, are needed

too. The talk presents robust methodology based on the joint application of trimming and

feasible restrictions for different clusters and mixture models settings. As it is typical in all

proposals designed for this aim, some input parameter needs to chosen, to set the

trimming level and the scatter constraints. Data driven tools for helping the user in

choosing such values will be also presented.

for more info:

e-mail: francesca.greselin@unimib.it http://www.dismeq.unimib.it