\alias{add.scale.bar}
\title{Add a Scale Bar to a Phylogeny Plot}
\usage{
-add.scale.bar(x, y, length = NULL, ask = FALSE, ...)
+add.scale.bar(x, y, length = NULL, ask = FALSE,
+ lwd = 1, lcol = "black", ...)
}
\arguments{
\item{x}{x location of the bar (can be left missing).}
none is supplied, a value is calculated from the data.}
\item{ask}{a logical; if \code{TRUE} the user is asked to click where
to draw the bar. The default is \code{FALSE}.}
+ \item{lwd}{the width of the bar.}
+ \item{lcol}{the colour of the bar (use \code{col} for the colour of
+ the text).}
\item{\dots}{further arguments to be passed to \code{text}.}
}
\description{