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\name{stat_function}
\alias{stat_function}
\alias{StatFunction}
\title{stat\_function}
\description{Superimpose a function }
\details{
This page describes stat\_function, 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 stat\_function. Aesthetics are mapped to variables in the data with the aes function: \code{stat\_function(aes(x = var))}
\itemize{
\item \code{y}: y position
}
}
\usage{stat_function(mapping = NULL, data = NULL, geom = "path", position = "identity",
fun, n = 101, args = list(), ...)}
\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{geom}{geometric used by this layer}
\item{position}{position adjustment used by this layer}
\item{fun}{function to use}
\item{n}{number of points to interpolate along}
\item{args}{list of additional arguments to pass to fun}
\item{...}{other arguments}
}
\seealso{\itemize{
\item \url{http://had.co.nz/ggplot2/stat_function.html}
}}
\value{A \code{\link{layer}}}
\examples{\dontrun{
x <- rnorm(100)
base <- qplot(x, geom="density")
base + stat_function(fun = dnorm, colour = "red")
base + stat_function(fun = dnorm, colour = "red", arg = list(mean = 3))
}}
\author{Hadley Wickham, \url{http://had.co.nz/}}
\keyword{hplot}
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