idahohd {datana} | R Documentation |
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, cm.
- toth
Height of the tree, in m.
Source
The data were assembled from the 'ufc' dataframe from the 'alr4' library.
References
Weisberg S. 2014. Applied Linear Regression. 4th edition. New York: Wiley.
Examples
data(idahohd)
head(idahohd)
plot(toth~dbh, data=idahohd)
[Package datana version 1.0.5 Index]