ptaeda: Height growth of Pinus taeda (Loblolly pine) trees
In datana: Datasets and Functions to Accompany Analisis De Datos Con R

ptaeda

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)")

datana documentation built on June 13, 2025, 1:11 a.m.