返回Google圖書搜尋

An Additive Bivariate Hierarchical Model for Functional Data and Related Computations

出版	Texas A & M University, 2011
URL	http://books.google.com.hk/books?id=Yj1UAQAACAAJ&hl=&source=gbs_api

註釋The work presented in this dissertation centers on the theme of regression and computation methodology. Functional data is an important class of longitudinal data, and principal component analysis is an important approach to regression with this type of data. Here we present an additive hierarchical bivariate functional data model employing principal components to identify random effects. This additive model extends the univariate functional principal component model. These models are implemented in the pfda package for R. To fit the curves from this class of models orthogonalized spline basis are used to reduce the dimensionality of the fit, but retain flexibility. Methods for handing spline basis functions in a purely analytical manner, including the orthogonalizing process and computing of penalty matrices used to fit the principal component models are presented. The methods are implemented in the R package orthogonalsplinebasis. The projects discussed involve complicated coding for the implementations in R. To facilitate this I created the NppToR utility to add R functionality to the popular windows code editor Notepad++. A brief overview of the use of the utility is also included.