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)
Format
An object of class c("nfnGroupedData", "nfGroupedData", "groupedData", "data.frame") 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)
plot(toth ~ age, data = ptaeda, subset = seed.id == 329,
xlab = "Age (yr)", las = 1,
ylab = "Height (m)")
[Package datana version 1.0.5 Index]