R: Extract lmList Object Groups

Extract lmList Object Groups

getGroups(object)

object an object inheriting from class lmList, representing a list of lm objects with a common model.

The grouping factor determining the partitioning of the observations used to produce the lm components of object is extracted.

a vector with the grouping factor corresponding to the lm components of object.

Jose Pinheiro and Douglas Bates

library(lme)
data(Orthodont)
fm1 <- lmList(distance ~ age | Subject, Orthodont)
getGroups(fm1)