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\name{ncfrog}
\alias{ncfrog}
\alias{ncfrog.rad}
\title{Northern Cricket Frog}
\usage{
data(ncfrog)
}
\description{
In an experiment due to Ferguson et al. (1967) a number of northern
cricket frogs (Acris crepitans) were collected from the mud flats of an
abandoned stream meandering near Indianola, Mississippi, and taken to a test pen
lying to the north west of the collection point. After 30 hours of
enclosure within a dark environmental chamber, 14 of them were released and
the directions taken by these frogs recorded. 0 degrees means North.
}
\format{
\code{ncfrog} is a vector of 14 observations (in degrees).
\code{ncfrog.rad} contains the same observations in radians (pi/180).
}
\source{
Collett, D. (1980)
Outliers in Circular Data
\emph{Applied Statistics}
\bold{29}, 1, 50--57.
}
\seealso{
Ferguson, D.E, Landreth, H.F. and McKeown, J.P. (1967)
Sun compass orientation of the northern cricket frog, \emph{Acris crepitans}.
\emph{Anim. Behav.},
\bold{14}, 45--53.
}
%\examples{}
\keyword{datasets}
|
