Extract gls Object Groups
Usage
getGroups(object)
Arguments
object
|
an object inheriting from class gls , representing
a generalized least squares fitted linear model.
|
Description
If present, the grouping factor associated to the correlation
structure for the linear model represented by object
is extracted.Value
if the linear model represented by object
incorporates a
correlation structure and the corresponding corStruct
object
has a grouping factor, a vector with the group values is returned;
else, NULL
is returned.Author(s)
Jose Pinheiro and Douglas BatesSee Also
gls
, corClasses
Examples
library(lme)
data(Ovary)
fm1 <- gls(follicles ~ sin(2*pi*Time) + cos(2*pi*Time), Ovary,
correlation = corAR1(form = ~ 1 | Mare))
getGroups(fm1)