u.genv: Select the dimension of genv

In Renvlp: Computing Envelope Estimators

Select the dimension of genv

Description

This function outputs dimensions selected by Akaike information criterion (AIC), Bayesian information criterion (BIC) and likelihood ratio testing with specified significance level for the groupwise envelope model.

Usage

u.genv(X, Y, Z, alpha = 0.01)

Arguments

X	Predictors. An n by p matrix, p is the number of predictors. The predictors can be univariate or multivariate, discrete or continuous.
Y	Multivariate responses. An n by r matrix, r is the number of responses and n is number of observations. The responses must be continuous variables.
Z	A group indicator vector of length n, where n denotes the number of observations.
alpha	Significance level for testing. The default is 0.01.

Value

u.aic	Dimension of the groupwise envelope subspace selected by AIC.
u.bic	Dimension of the groupwise envelope subspace selected by BIC.
u.lrt	Dimension of the groupwise envelope subspace selected by the likelihood ratio testing procedure.
loglik.seq	Log likelihood for dimension from 0 to r.
aic.seq	AIC value for dimension from 0 to r.
bic.seq	BIC value for dimension from 0 to r.

Examples

data(fiberpaper)
X <- fiberpaper[ , c(5, 7)]
Y <- fiberpaper[ , 1:3]
Z <- as.numeric(fiberpaper[ , 6] > mean(fiberpaper[ , 6]))

u <- u.genv(X, Y, Z)
u

Renvlp documentation built on Oct. 11, 2023, 1:06 a.m.