roller {DAAG} | R Documentation |
Lawn Roller Data
Description
The roller
data frame has 10 rows and 2 columns.
Different weights of roller were rolled over different parts
of a lawn, and the depression was recorded.
Usage
roller
Format
This data frame contains the following columns:
- weight
a numeric vector consisting of the roller weights
- depression
the depth of the depression made in the grass under the roller
Source
Stewart, K.M., Van Toor, R.F., Crosbie, S.F. 1988. Control of grass grub (Coleoptera: Scarabaeidae) with rollers of different design. N.Z. Journal of Experimental Agriculture 16: 141-150.
Examples
plot(roller)
roller.lm <- lm(depression ~ weight, data = roller)
plot(roller.lm, which = 4)
[Package DAAG version 1.25.6 Index]