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

### 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 in the args list in buildmerControl. Note that buildlme will merely pass this through; no term reordering or stepwise elimination is done on a user-provided random argument.

buildmer-package
library(buildmer)