| % File src/library/datasets/man/InsectSprays.Rd |
| % Part of the R package, https://www.R-project.org |
| % Copyright 1995-2007 R Core Team |
| % Distributed under GPL 2 or later |
| |
| \name{InsectSprays} |
| \docType{data} |
| \alias{InsectSprays} |
| \title{Effectiveness of Insect Sprays} |
| \description{ |
| The counts of insects in agricultural experimental units treated with |
| different insecticides. |
| } |
| \usage{InsectSprays} |
| \format{ |
| A data frame with 72 observations on 2 variables. |
| \tabular{rlll}{ |
| [,1] \tab count \tab numeric \tab Insect count\cr |
| [,2] \tab spray \tab factor \tab The type of spray |
| } |
| } |
| \source{ |
| Beall, G., (1942) |
| The Transformation of data from entomological field experiments, |
| \emph{Biometrika}, \bold{29}, 243--262. |
| } |
| \references{ |
| McNeil, D. (1977) \emph{Interactive Data Analysis}. |
| New York: Wiley. |
| } |
| \examples{ |
| 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) |
| } |
| \keyword{datasets} |