idahohd {datana}

Tree height-diameter data from Idaho (USA).

Description

These data are forest inventory measures from the Upper Flat Creek stand of the University of Idaho Experimental Forest, dated 1991.

Usage

data(idahohd)

Format

Contains five variables, as follows:

plot

plot number.

tree

tree within plot.

species

a factor with levels DF = Douglas-fir, GF = Grand fir, SF = Subalpine fir, WL = Western larch, WC = Western red cedar, WP = White pine.

dbh

Diameter 137 cm perpendicular to the bole, mm.

height

Height of the tree, in decimeters.

Source

The data were obtained from the alr4 library.

References

Weisberg S. 2014. Applied Linear Regression. 4th edition. New York: Wiley.

Examples

data(idahohd)    
head(idahohd)