\Header{cane}{Sugar-cane Disease Data}
\keyword{datasets}{cane}
\begin{Description}\relax
The \code{cane} data frame has 180 rows and 5 columns. 
The data frame represents a randomized
block design with 45 varieties of sugar-cane and 4 blocks.
\end{Description}
\begin{Usage}
\begin{verbatim}
data(cane)
\end{verbatim}
\end{Usage}
\begin{Format}\relax
This data frame contains the following columns:

\describe{
\item[\code{n}] The total number of shoots in each plot.

\item[\code{r}] The number of diseased shoots.

\item[\code{x}] The number of pieces of the stems, out of 50, planted in each plot.

\item[\code{var}] A factor indicating the variety of sugar-cane in each plot.

\item[\code{block}] A factor for the blocks.
}
\end{Format}
\begin{Details}\relax
The aim of the experiment was to classify the varieties into
resistant, intermediate and susceptible to a disease called "coal of
sugar-cane" (carvao da cana-de-acucar).  This is a disease that is
common in sugar-cane plantations in certain areas of Brazil.

For each plot, fifty pieces of sugar-cane stem were put in a solution
containing the disease agent and then some were planted in the plot.
After a fixed period of time, the total number of shoots and the number
of diseased shoots were recorded.
\end{Details}
\begin{Source}\relax
The data were kindly supplied by Dr. C.G.B. Demetrio of Escola
Superior de Agricultura, Universidade de Sao Paolo, Brazil.
\end{Source}
\begin{References}\relax
Davison, A.C. and Hinkley, D.V. (1997) 
\emph{Bootstrap Methods and Their Application}. Cambridge University Press.
\end{References}

