Loblolly {datasets} | R Documentation |
The Loblolly
data frame has 84 rows and 3 columns of records of
the growth of Loblolly pine trees.
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.
require(stats) 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)))