ptaeda {datana} | R Documentation |
Height growth of Pinus taeda (Loblolly pine) trees
Description
The Loblolly data frame has 84 rows and tree columns of records of the tree
height growth of Loblolly pine trees. This dataframe
is a slight modification to the original dataframe "Loblolly" from the
datasets
R package.
Usage
data(ptaeda, package="datana")
Format
A dataframe containing the following columns:
- seed.id
an ordered factor indicating the seed source for the tree. The ordering is according to increasing maximum height.
- age
a numeric vector of tree ages, in yr.
- toth
a numeric vector of tree heights, in m.
Source
Pinheiro, J. C. and Bates, D. M. (2000) Mixed-effects Models in S and S-PLUS. Springer.
Examples
data(ptaeda, package="datana")
head(ptaeda)
plot(toth ~ age, data = subset(ptaeda, seed.id == 329),
xlab = "Age (yr)", las = 1,
ylab = "Height (m)")
[Package datana version 1.1.1 Index]