\Header{cabbages}{Data from a cabbage field trial}
\keyword{datasets}{cabbages}
\begin{Description}\relax
The \code{cabbages} data set has 60 observations and 4 variables
\end{Description}
\begin{Usage}
\begin{verbatim}
data(cabbages)
\end{verbatim}
\end{Usage}
\begin{Format}\relax
This data frame contains the following columns:
\describe{
\item[\code{Cult}] Factor giving the cultivar of the cabbage, two levels: \code{c39} and \code{c52}.

\item[\code{Date}] Factor specifying one of three planting dates: \code{d16}, \code{d20} or \code{d21}.

\item[\code{HeadWt}] Weight of the cabbage head, presumably in kg.

\item[\code{VitC}] Ascorbic acid content, in undefined units.
}
\end{Format}
\begin{Source}\relax
Rawlings, J. O. (1988)
\emph{Applied Regression Analysis: A Research Tool.}
Wadsworth and Brooks/Cole.  Example 8.4, page 219.
(Rawlings cites the original source as the files of the late
Dr Gertrude M Cox.)
\end{Source}
\begin{References}\relax
Venables, W. N. and Ripley, B. D. (1999)
\emph{Modern Applied Statistics with S-PLUS.} Third
Edition. Springer.
\end{References}

