blowBS: Blowdown data, Black Spruce only

In alr4: Data to Accompany Applied Linear Regression 4th Edition

Description

Data from the Boundary Waters Canoe Area Wilderness Blowdown. The data frame Blowdown includes nine species of trees, but this file only includes black spruce, grouped by diameter.

Format

This data frame contains the following columns:

d

Tree diameter, in cm

died

Number of trees of this value of d that died (blowdown)

m

number of trees of this size class measured

Source

Roy Rich

References

S. Weisberg (2014). Applied Linear Regression, fourth edition. New York: Wiley.

Examples

head(BlowBS)

Example output

Loading required package: car
Loading required package: carData
Loading required package: effects
lattice theme set by effectsTheme()
See ?effectsTheme for details.
    d died  m
1 5.0    6 88
2 5.5    1  2
3 6.0    6 91
4 6.5    1  1
5 7.0   17 90
6 7.5    1  1

alr4 documentation built on May 2, 2019, 6:40 p.m.