extract.lmeDesign {RLRsim}

Extract the Design of a linear mixed model

Description

These functions extract various elements of the design of a fitted lme-, mer or lmerMod-Object. They are called by exactRLRT and exactLRT.

Usage

extract.lmeDesign(m)

Arguments

m

a fitted lme- or merMod-Object

Value

a a list with components

• Vr estimated covariance of the random effects divided by the estimated variance of the residuals

• X design of the fixed effects

• Z design of the random effects

• sigmasq variance of the residuals

• lambda ratios of the variances of the random effects and the variance of the residuals

• y response variable

Author(s)

Fabian Scheipl, extract.lmerModDesign by Ben Bolker. Many thanks to Andrzej Galecki and Tomasz Burzykowski for bug fixes.

Examples

library(nlme)
design <- extract.lmeDesign(lme(distance ~ age + Sex, data = Orthodont, 
                             random = ~ 1))
str(design)