Loblolly

Growth of Loblolly pine trees

The Loblolly data frame has 84 rows and 3 columns of records of the growth of Loblolly pine trees.

Keywords
datasets
Usage
Loblolly
Details

This dataset was originally part of package nlme, and that has methods (including for [, as.data.frame, plot and print) for its grouped-data classes.

Format

An object of class c("nfnGroupedData", "nfGroupedData", "groupedData", "data.frame") containing the following columns:

height

a numeric vector of tree heights (ft).

age

a numeric vector of tree ages (yr).

Seed

an ordered factor indicating the seed source for the tree. The ordering is according to increasing maximum height.

Aliases
  • Loblolly
Examples
library(datasets) # NOT RUN { require(stats); require(graphics) 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) age <- seq(0, 30, length.out = 101) lines(age, predict(fm1, list(age = age))) # }
Documentation reproduced from package datasets, version 3.4.3, License: Part of R 3.4.3

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