The R Project SVN R

\name{ToothGrowth}
\title{The Effect of Vitamin C on Tooth Growth in Guinea Pigs}
\usage{data(ToothGrowth)}
\alias{ToothGrowth}
\format{A data frame with 60 observations on 3 variables.
    \tabular{rlll}{
        [,1]  \tab len   \tab numeric  \tab Tooth length\cr
        [,2]  \tab supp  \tab factor   \tab Supplement type (VC or OJ).\cr
        [,3]  \tab dose  \tab numeric  \tab Dose in milligrams.
    }
}
\source{
    C. I. Bliss (1952).  The Statistics of Bioassay, Academic Press.
}
\description{
    The response is the length of odontoblasts (teeth) in each
    of 10 guinea pigs at each of three dose levels of Vitamin C (0.5, 1,
    and 2 mg) with each of two delivery methods (orange juice or
    ascorbic acid).
}
\references{
    McNeil, D. R. (1977).  Interactive Data Analysis.  New York: Wiley.
}
\examples{
data(ToothGrowth)
coplot(len ~ dose | supp, data = ToothGrowth, panel = panel.smooth,
       xlab = "ToothGrowth data: given is supplement type")
}
\keyword{datasets}