The
Orthodont
data frame has 108 rows and 4 columns giving an
orthodontic measurement on 11 girls and 16 boys at 4 different ages.
This data frame contains the following columns:
These data are given in Potthoff and Roy (1964), "A generalized multivariate analysis of variance model useful especially for growth curve problems", Biometrika, 51, 313. They were originally collected by investigators at the University of North Carolina Dental School.
Orthodont.lis <- lmList(distance ~ age, data = Orthodont, cluster = ~ Subject) Orthodont.lme <- lme(Orthodont.lis)