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\name{corner.label}
\alias{corner.label}
\title{Find corner locations and optionally display a label}
\description{
Finds the coordinates in user parameters of a specified corner of the
figure region and optionally displays a label there
}
\usage{
corner.label(label=NULL,x=-1,y=1,xoff=NA,yoff=NA,figcorner=FALSE,...)
}
\arguments{
\item{label}{Text to display. The default is to display nothing.}
\item{x}{an integer value: -1 for the left side of the plot, 1 for the
right side}
\item{y}{an integer value: -1 for the bottom side of the plot, 1 for
the top side}
\item{xoff,yoff}{Horizontal and vertical text offsets. Defaults to one
half of the width and height of "m" respectively. }
\item{figcorner}{Whether to find/display at the corner of the plot or figure.}
\item{...}{further arguments to the \samp{text} command for the label}
}
\details{
\samp{corner.label} finds the specified corner of the plot or figure and if
\samp{label} is not NULL, displays it there. The text justification is specified
so that the label will be justified away from the corner. To get the label
squeezed right into a corner, set \samp{xoff} and \samp{yoff} to zero.
}
\value{
A list of the x and y positions of the corner adjusted for the offsets.
}
\author{Ben Bolker}
\examples{
plot(1:10,1:10)
corner.label("A")
corner.label(x=1,y=1)
corner.label("B",y=-1,x=1,figcorner=TRUE,col="red")
}
\keyword{aplot}
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