buildlme {buildmer}R Documentation

Use buildmer to perform stepwise elimination of mixed-effects models fit via lme from nlme

Description

Use buildmer to perform stepwise elimination of mixed-effects models fit via lme from nlme

Usage

buildlme(formula, data = NULL, buildmerControl = buildmerControl(), ...)

Arguments

formula

A formula specifying both fixed and random effects using lme4 syntax. (Unlike lme, buildlme does not use a separate random argument!)

data

See the general documentation under buildmer-package

buildmerControl

Control arguments for buildmer — see the general documentation under buildmerControl

...

Additional options to be passed to lme; for backward-compatibility reasons, will also accept buildmer control parameters, although those specified in buildmerControl will take precedence

Details

The fixed and random effects are to be passed as a single formula in lme4 format. This is internally split up into the appropriate fixed and random parts. Only a single grouping factor is allowed. The random-effect covariance matrix is always unstructured. If you want to use pdMat covariance structures, you must (a) not specify any lme4 random-effects term in the formula, and (b) specify your own custom random argument as part of the ... argument. Note that buildlme will merely pass this through; no term reordering or stepwise elimination is done on a user-provided random argument.

See Also

buildmer-package

Examples

library(buildmer)
model <- buildlme(Reaction ~ Days + (Days|Subject),data=lme4::sleepstudy)

[Package buildmer version 1.9 Index]