Publication
Combining models in discrete discriminant analysis in the multiclass case
| dc.contributor.author | Marques, Anabela | |
| dc.contributor.author | Ferreira, Ana Sousa | |
| dc.contributor.author | Cardoso, Margarida | |
| dc.date.accessioned | 2015-03-25T16:10:10Z | |
| dc.date.available | 2015-03-25T16:10:10Z | |
| dc.date.issued | 2008 | |
| dc.description | Resumo de comunicação oral em póster apresentado em COMPSTAT2008 - 18th International Conference on Computational Statistics, Porto, Portugal, 24 a 29 de Agosto 2008 | por |
| dc.description.abstract | The idea of combining models in Discrete Discriminant Analysis (DDA) is present in a growing number of papers which aim to obtain more robust and more stable models than any of the competing ones. This seems to be a promising approach since it is known that different DDA models perform differently on different subjects (Brito et al.(2006)). In particular, this will be a more relevant issue if the groups are not well separated, which often occurs in practice. In the present work a new methodological approach is suggested which is based on DDA models' combination. The multiclass problem is decomposed into several dichotomous problems that are nested in a hierarchical binary tree (Sousa Ferreira (2000), Brito et al. (2006)) and at each level of the binary tree a new combining model is proposed to derive the decision rule. This combining model is based on two well known models in the literature - the First-order Independence Model (FOIM) and the Dependence Trees Model (DTM) (Celeux and Nakache (1994)). The MATLAB software is used for the algorithms' implementation and the proposed approach is illustrated in a DDA application. | por |
| dc.identifier.citation | In COMPSTAST'2008: Book of abstracts. (2008). Porto: FEP | por |
| dc.identifier.uri | http://hdl.handle.net/10400.26/8127 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.publisher | Faculdade de Economia da Universidade do Porto | por |
| dc.subject | Combining model | por |
| dc.subject | Discrete discriminant analysis | por |
| dc.subject | First-order independence model | por |
| dc.subject | Dependence trees model | por |
| dc.title | Combining models in discrete discriminant analysis in the multiclass case | por |
| dc.type | conference object | |
| dspace.entity.type | Publication | |
| oaire.citation.conferencePlace | Porto | por |
| oaire.citation.endPage | 270 | por |
| oaire.citation.startPage | 270 | por |
| oaire.citation.title | COMPSTAT'2008: Book of abstracts | por |
| rcaap.rights | openAccess | por |
| rcaap.type | conferenceObject | por |