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\name{geom_jitter}
\alias{geom_jitter}
\alias{GeomJitter}
\title{geom\_jitter}
\description{Points, jittered to reduce overplotting}
\details{
The jitter geom is a convenient default for geom\_point with position = 'jitter'. See position\_jitter for more details on adjusting the amount of jittering.
This page describes geom\_jitter, see \code{\link{layer}} and \code{\link{qplot}} for how to create a complete plot from individual components.
}
\section{Aesthetics}{
The following aesthetics can be used with geom\_jitter. Aesthetics are mapped to variables in the data with the aes function: \code{geom\_jitter(aes(x = var))}
\itemize{
\item \code{x}: x position (\strong{required})
\item \code{y}: y position (\strong{required})
\item \code{shape}: shape of point
\item \code{colour}: border colour
\item \code{size}: size
\item \code{fill}: internal colour
\item \code{alpha}: transparency
}
}
\section{Advice}{
It is often useful for plotting categorical data.
}
\usage{geom_jitter(mapping = NULL, data = NULL, stat = "identity", position = "jitter",
na.rm = FALSE, ...)}
\arguments{
\item{mapping}{mapping between variables and aesthetics generated by aes}
\item{data}{dataset used in this layer, if not specified uses plot dataset}
\item{stat}{statistic used by this layer}
\item{position}{position adjustment used by this layer}
\item{na.rm}{NULL}
\item{...}{ignored }
}
\seealso{\itemize{
\item \code{\link{geom_point}}: Regular, unjittered points
\item \code{\link{geom_boxplot}}: Another way of looking at the conditional distribution of a variable
\item \code{\link{position_jitter}}: For examples, using jittering with other geoms
\item \url{http://had.co.nz/ggplot2/geom_jitter.html}
}}
\value{A \code{\link{layer}}}
\examples{\dontrun{
p <- ggplot(movies, aes(x=mpaa, y=rating))
p + geom_point()
p + geom_point(position = "jitter")
# Add aesthetic mappings
p + geom_jitter(aes(colour=rating))
# Vary parameters
p + geom_jitter(position=position_jitter(width=5))
p + geom_jitter(position=position_jitter(height=5))
# Use qplot instead
qplot(mpaa, rating, data=movies, geom="jitter")
qplot(mpaa, rating, data=movies, geom=c("boxplot","jitter"))
qplot(mpaa, rating, data=movies, geom=c("jitter", "boxplot"))
}}
\author{Hadley Wickham, \url{http://had.co.nz/}}
\keyword{hplot}
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