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\name{thigmophobe.labels}
\title{Place labels away from the nearest point}
\usage{
thigmophobe.labels(x,y,labels=NULL,text.pos=NULL,...)
}
\alias{thigmophobe.labels}
\arguments{
\item{x,y}{Numeric data vectors or a list with two components.
Typically the x/y coordinates of plotted points.}
\item{labels}{A vector of strings that will be placed adjacent to
each point. Defaults to the indices of the coordinates.}
\item{text.pos}{An optional vector of text positions (see
\link{text}).}
\item{...}{additional arguments are passed to \samp{text}}.
}
\description{
\samp{thigmophobe.labels} places labels adjacent to each point,
offsetting each label in the direction returned by
\samp{thigmophobe}.
}
\details{
Typically used to automatically place labels on a scatterplot or
similar to avoid overlapping labels. \samp{thigmophobe.labels}
will sometimes place a label off the plot or fail to separate
labels in clusters of points. The user can manually adjust the
errant labels by running \samp{thigmophobe} first and saving
the returned vector. Then modify the position values to place
the labels properly and pass the edited vector to
\samp{thigmophobe.labels} as the \samp{text.pos} argument. This
takes precedence over the positions calculated by \samp{thigmophobe}.
Both \samp{pointLabel} in the \pkg{maptools} package and \samp{spread.labs}
in the \pkg{TeachingDemos} package use more sophisticated algorithms to
place the labels and are worth a try if \samp{thigmophobe} just won't get it
right.
}
\value{
A vector of directions away from the point nearest to each point.
}
\keyword{misc}
\author{Jim Lemon}
\seealso{\link{thigmophobe}, \link{text}}
\examples{
x<-rnorm(20)
y<-rnorm(20)
xlim<-range(x)
xspace<-(xlim[2]-xlim[1])/20
xlim<-c(xlim[1]-xspace,xlim[2]+xspace)
ylim<-range(y)
yspace<-(ylim[2]-ylim[1])/20
ylim<-c(ylim[1]-yspace,ylim[2]+yspace)
plotlabels<-
c("one","two","three","four","five","six","seven","eight","nine","ten",
"eleven","twelve","thirteen","fourteen","fifteen","sixteen","seventeen",
"eighteen","nineteen","twenty")
plot(x=x,y=y,xlim=xlim,ylim=ylim,main="Test thigmophobe.labels")
# skip the almost invisible yellow label, make them bold and without borders
thigmophobe.labels(x,y,plotlabels,col=c(2:6,8:12),border=NA,font=2)
}
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