blowdown {alr3} | R Documentation |
Blowdown data
Description
Data from the Boundary Waters Canoe Area Wilderness Blowdown. The data frame blowdown includes nine species of trees, blowAPB gives data for aspen and paper birch, while blowBF gives data for Balsam Fir only.
Format
This data frame contains the following columns:
- D
-
Tree diameter, in cm
- S
-
Proportion of basal area killed for the four species BF, C, PB, BS, a measure of local severity of the storm.
- y
-
1 of the tree died, 0 if it survived
- SPP
-
BF= balsam fir, BS= black spruce, C= cedar, JP= jackpine, PB= paper birch, RP= red pine, RM= red maple, BA = black ash, A= aspen.
Source
Roy Rich
References
S. Weisberg (2005). Applied Linear Regression, third edition. New York: Wiley.
Examples
head(blowBF)
[Package alr3 version 2.0.8 Index]