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\name{geom_errorbarh}
\alias{geom_errorbarh}
\alias{GeomErrorbarh}
\title{geom\_errorbarh}
\description{Horizontal error bars}
\details{
This page describes geom\_errorbarh, 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\_errorbarh. Aesthetics are mapped to variables in the data with the aes function: \code{geom\_errorbarh(aes(x = var))}
\itemize{
\item \code{x}: x position (\strong{required})
\item \code{xmin}: left (hortizontal minimum) (\strong{required})
\item \code{xmax}: right (hortizontal maximum) (\strong{required})
\item \code{colour}: border colour
\item \code{size}: size
\item \code{linetype}: line type
\item \code{height}: height
\item \code{alpha}: transparency
}
}
\usage{geom_errorbarh(mapping = NULL, data = NULL, stat = "identity",
position = "identity", ...)}
\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{...}{ignored }
}
\seealso{\itemize{
\item \code{\link{geom_errorbar}}: vertical error bars
\item \url{http://had.co.nz/ggplot2/geom_errorbarh.html}
}}
\value{A \code{\link{layer}}}
\examples{\dontrun{
df <- data.frame(
trt = factor(c(1, 1, 2, 2)),
resp = c(1, 5, 3, 4),
group = factor(c(1, 2, 1, 2)),
se = c(0.1, 0.3, 0.3, 0.2)
)
# Define the top and bottom of the errorbars
p <- ggplot(df, aes(resp, trt, colour = group))
p + geom_point() +
geom_errorbarh(aes(xmax = resp + se, xmin = resp - se))
}}
\author{Hadley Wickham, \url{http://had.co.nz/}}
\keyword{hplot}
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