Extract lme Object Grouping Formula
Usage
getGroupsFormula(object, asList)
Arguments
object
|
an object inheriting from class lme , representing
a fitted linear mixed-effects model.
|
asList
|
an optional logical value. If TRUE the returned
value with be a list of formulas; else, if FALSE the returned
value will be a one-sided formula. Defaults to FALSE .
|
Description
The grouping formula associated with the random effects structure
(reStruct
) of object
is returned either as
a named list of one-sided formulas, or a single one-sided formula,
depending on the value of asList
. The components of the
returned list are ordered from outermost to innermost level and are
named after the grouping factor expression.Value
a one-sided formula, or a list of one-sided formulas, with the
grouping structure associated with the random effects structure of
object
.Author(s)
Jose Pinheiro and Douglas BatesSee Also
reStruct
, getGroups.lme
Examples
library(lme)
data(Orthodont)
fm1 <- lme(distance ~ age + Sex, data = Orthodont, random = ~ 1)
getGroupsFormula(fm1)