Combining models in discrete discriminant analysis

Marques, Anabela; Ferreira, Ana Sousa; Cardoso, Margarida

http://hdl.handle.net/10400.26/8131

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Authors

Marques, Anabela

Ferreira, Ana Sousa

Cardoso, Margarida

Abstract(s)

Diverse Discrete Discriminant Analysis (DDA) models perform differently on different sample observations (Brito et al. (2006)). This fact has encouraged research in combined models for DDA. This research seems to be specially promising when the a priori classes are not well separated or when small or moderate sized samples are considered, which often occurs in practice. In this work we evaluate the performance of a linear combination of two DDA models (Marques et al. (2008)): the First-Order Independence Model (FOIM) and the Dependence Trees Model (DTM) (Celeux and Nakache (1994). The pro- posed methodology also uses a Hierarchical Coupling Model (HIERM) when addressing multiclass classification problems, decomposing the multiclass problems into several bi-class problems, using a binary tree structure (Sousa Ferreira (2000)). The analysis is based both on simulated and real datasets. Results include measures of precision regarding a training set, a test set and cross-validation. The R software is used for the algorithm's implementation.

Description

Resumo da comunicação em póster apresentada em International Conference on Trends and Perspectives in Linear Statistical Inference (LinStat'2010), Tomar, Portugal, 27-31 July, 2010

Keywords

Combining model Discrete discriminant analysis First-order independence model Dependence trees model

URI

http://hdl.handle.net/10400.26/8131

Citation

In Book of abstracts of the International Conference on Trends and Perspectives in Linear Statistical Inference (LinStat’2010). Tomar: Instituto Politécnico, 2010.