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\name{arrows.circular}
\alias{arrows.circular}
\title{Add Arrows to a Circular Plot}
\description{
Draw arrows in a circular plot.
}
\usage{
arrows.circular(x, y = NULL, x0 = 0, y0 = 0, na.rm = FALSE,
shrink = 1, plot.info = NULL, zero = NULL, rotation = NULL, ...)
}
\arguments{
\item{x}{a vector. The object is coerced to class \code{\link{circular}}.}
\item{y}{a vector with the same length as \code{x}.}
\item{x0}{a vector of origins (x axis).}
\item{y0}{a vector of origins (y axis).}
\item{na.rm}{logical, indicating if \code{\link{NA}}'s should be omitted.}
\item{shrink}{parameter that controls the size of the plotted circle.
Default is 1. Larger values shrink the circle, while smaller values
enlarge the circle.}
\item{plot.info}{an object from \code{\link{plot.circular}} that
contains information on the \code{zero}, the \code{rotation} and \code{next.points}.}
\item{zero}{the zero used in the plot. Ignored if \code{plot.info} is provided.}
\item{rotation}{the rotation used in the plot. Ignored if \code{plot.info} is provided.}
\item{\dots}{further parameters passed to \code{\link{arrows}}.}
}
\author{Claudio Agostinelli}
\note{The function call \code{\link{arrows}} and it is not a method of \code{\link{arrows}}.}
\seealso{\code{\link{arrows}}}
\examples{
plot(rvonmises(10, circular(0), kappa=1))
arrows.circular(rvonmises(10, circular(0), kappa=1))
arrows.circular(rvonmises(10, circular(0), kappa=1), y=runif(10), col=2)
arrows.circular(rvonmises(10, circular(0), kappa=1), y=runif(10),
x0=runif(10, -1, 1), y0=runif(10, -1, 1), col=3)
}
\keyword{aplot}
\keyword{hplot}
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