\HeaderA{sleep}{Mammal sleep data}{sleep}
\keyword{datasets}{sleep}
%
\begin{Description}\relax
Sleep data with missing values.
\end{Description}
%
\begin{Usage}
\begin{verbatim}
data(sleep)
\end{verbatim}
\end{Usage}
%
\begin{Format}
A data frame with 62 observations on the following 10 variables.
\begin{description}

\item[\code{BodyWgt}] a numeric vector
\item[\code{BrainWgt}] a numeric vector
\item[\code{NonD}] a numeric vector
\item[\code{Dream}] a numeric vector
\item[\code{Sleep}] a numeric vector
\item[\code{Span}] a numeric vector
\item[\code{Gest}] a numeric vector
\item[\code{Pred}] a numeric vector
\item[\code{Exp}] a numeric vector
\item[\code{Danger}] a numeric vector

\end{description}

\end{Format}
%
\begin{Source}\relax
Allison, T. and Chichetti, D. (1976) Sleep in mammals: ecological and 
constitutional correlates. \emph{Science} \bold{194 (4266)}, 732--734.

The data set was imported from \code{GGobi}.
\end{Source}
%
\begin{Examples}
\begin{ExampleCode}
data(sleep, package = "VIM")
summary(sleep)
aggr(sleep)
\end{ExampleCode}
\end{Examples}
