plasma

This data set is used for the routine plotpersp. It contains 314 observations of blood plasma, beta carotene measurements along with several covariates. High levels of blood plasma and beta carotene are believed to be protective against cancer, and it is of interest to determine the relationships with covariates.

datasets

A constrained generalized additive model is fitted by the cgam routine. Given a set of predictors with or without shape or order restrictions, the maximum likelihood estimator for the constrained generalized additive model is found using an iteratively re-weighted cone projection algorithm. The cone information criterion (CIC) may be used to select the best combination of variables and shapes. One extension of this package is isotonic regression in two dimensions using warped-plane splines without using additivity assumptions, which is implemented by the wps routine.

Xiyue Liao

cgam

Constrained Generalized Additive Model

plasma function

<url>http://axon.cs.byu.edu/data/statlib/numeric/plasma_retinol.arff</url>

plasma: A Data Set for Cgam

Description

Usage

Arguments

source

Examples