blowdown: Blowdown data

In alr3: Data to Accompany Applied Linear Regression 3rd Edition

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)

alr3 documentation built on May 2, 2019, 5:39 a.m.