| Loblolly {stats} | R Documentation |
The Loblolly data frame has 84 rows and 3 columns of records of
the growth of Loblolly pine trees.
data(Loblolly)
This data frame contains the following columns:
Kung, F. H. (1986), “Fitting logistic growth curve with predetermined carrying capacity”, Proceedings of the Statistical Computing Section, American Statistical Association, 340–343.
Pinheiro, J. C. and Bates, D. M. (2000) Mixed-effects Models in S and S-PLUS, Springer.
data(Loblolly)
plot(height ~ age, data = Loblolly, subset = Seed == 329,
xlab = "Tree age (yr)", las = 1,
ylab = "Tree height (ft)",
main = "Loblolly data and fitted curve (Seed 329 only)")
fm1 <- nls(height ~ SSasymp(age, Asym, R0, lrc),
data = Loblolly, subset = Seed == 329)
summary(fm1)
age <- seq(0, 30, len = 101)
lines(age, predict(fm1, list(age = age)))