RLRsim: extract.lmeDesign – R documentation

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extract.lmeDesign

Extract the Design of a linear mixed model

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

extract.lmeDesign(m)

`m`	a fitted `lme`- or `merMod`-Object

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

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

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

Exact (Restricted) Likelihood Ratio Tests for Mixed and Additive Models

v3.1-6

GPL

Authors

Fabian Scheipl [aut, cre] (<https://orcid.org/0000-0001-8172-3603>), Ben Bolker [ctb] (<https://orcid.org/0000-0002-2127-0443>)

Initial release