Brasil
| Tesis
Penalized regression methods for compositional data
dc.contributor | Louzada Neto, Francisco | |
dc.contributor | http://lattes.cnpq.br/0994050156415890 | |
dc.contributor | http://lattes.cnpq.br/4655747321002185 | |
dc.creator | Shimizu, Taciana Kisaki Oliveira | |
dc.date.accessioned | 2019-02-27T17:19:46Z | |
dc.date.available | 2019-02-27T17:19:46Z | |
dc.date.created | 2019-02-27T17:19:46Z | |
dc.date.issued | 2018-12-10 | |
dc.identifier | SHIMIZU, Taciana Kisaki Oliveira. Penalized regression methods for compositional data. 2018. Tese (Doutorado em Estatística) – Universidade Federal de São Carlos, São Carlos, 2018. Disponível em: https://repositorio.ufscar.br/handle/ufscar/11034. | |
dc.identifier | https://repositorio.ufscar.br/handle/ufscar/11034 | |
dc.description.abstract | Compositional data consist of known vectors such as compositions whose components are positive and defined in the interval (0,1) representing proportions or fractions of a "whole", where the sum of these components must be equal to one. Compositional data is present in different areas, such as in geology, ecology, economy, medicine, among many others. Thus, there is great interest in new modeling approaches for compositional data, mainly when there is an influence of covariates in this type of data. In this context, the main objective of this thesis is to address the new approach of regression models applied in compositional data. The main idea consists of developing a marked method by penalized regression, in particular the Lasso (least absolute shrinkage and selection operator), elastic net and Spike-and-Slab Lasso (SSL) for the estimation of parameters of the models. In particular, we envision developing this modeling for compositional data, when the number of explanatory variables exceeds the number of observations in the presence of large databases, and when there are constraints on the dependent variables and covariates. | |
dc.language | eng | |
dc.publisher | Universidade Federal de São Carlos | |
dc.publisher | UFSCar | |
dc.publisher | Programa Interinstitucional de Pós-Graduação em Estatística - PIPGEs | |
dc.publisher | Câmpus São Carlos | |
dc.rights | Acesso aberto | |
dc.subject | Dados composicionais | |
dc.subject | Modelo de regressão | |
dc.subject | Coordenadas log-razão isométricas | |
dc.subject | Seleção de variáveis | |
dc.subject | Compositional data | |
dc.subject | Regression model | |
dc.subject | Isometric logratio coordinates | |
dc.subject | Variable selection | |
dc.title | Penalized regression methods for compositional data | |
dc.type | Tesis |