\HeaderA{eagles}{Foraging Ecology of Bald Eagles}{eagles}
\keyword{datasets}{eagles}
\begin{Description}\relax
Knight and Skagen collected during a field study on the foraging
behaviour of wintering Bald Eagles in Washington State, USA data
concerning 160 attempts by one (pirating) Bald Eagle to steal a chum
salmon from another (feeding) Bald Eagle.
\end{Description}
\begin{Usage}
\begin{verbatim}
eagles
\end{verbatim}
\end{Usage}
\begin{Format}\relax
The \code{eagles} data frame has 8 rows and 5 columns.
\describe{
\item[\code{y}] Number of successful attempts.

\item[\code{n}] Total number of attempts.

\item[\code{P}] Size of pirating eagle (\code{L} = large, \code{S} = small).

\item[\code{A}] Age of pirating eagle (\code{I} = immature, \code{A} = adult).

\item[\code{V}] Size of victim eagle (\code{L} = large, \code{S} = small).
}
\end{Format}
\begin{Source}\relax
Knight, R. L. and Skagen, S. K. (1988)
Agonistic asymmetries and the foraging ecology of Bald Eagles.
\emph{Ecology}
\bold{69}, 1188--1194.
\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}
\begin{Examples}
\begin{ExampleCode}
eagles.glm <- glm(cbind(y, n - y) ~ P*A + V, data = eagles,
                  family = binomial)
dropterm(eagles.glm)
prof <- profile(eagles.glm)
plot(prof)
pairs(prof)
\end{ExampleCode}
\end{Examples}

