InsectSprays
Effectiveness of Insect Sprays
The counts of insects in agricultural experimental units treated with different insecticides.
- Keywords
- datasets
Usage
InsectSprays
Format
A data frame with 72 observations on 2 variables.
[,1] | count | numeric |
Insect count | [,1] | count |
Source
Beall, G., (1942) The Transformation of data from entomological field experiments, Biometrika, 29, 243--262.
References
McNeil, D. (1977) Interactive Data Analysis. New York: Wiley.
Examples
library(datasets)
require(stats); require(graphics)
boxplot(count ~ spray, data = InsectSprays,
xlab = "Type of spray", ylab = "Insect count",
main = "InsectSprays data", varwidth = TRUE, col = "lightgray")
fm1 <- aov(count ~ spray, data = InsectSprays)
summary(fm1)
opar <- par(mfrow = c(2, 2), oma = c(0, 0, 1.1, 0))
plot(fm1)
fm2 <- aov(sqrt(count) ~ spray, data = InsectSprays)
summary(fm2)
plot(fm2)
par(opar)
Community examples
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