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\name{drawNestedBars}
\alias{drawNestedBars}
\title{Display nested bars}
\description{Displays the nested bars for barNest.}
\usage{
drawNestedBars(x,start,end,shrink=0.1,errbars=FALSE,intervals=TRUE,col=NA,
labelcex=1,lineht=NULL,showall=TRUE,Nwidths=FALSE,barlabels=NULL,
showlabels=TRUE,arrow.cap=NA)
}
\arguments{
\item{x}{One level of the breakdown produced by \samp{brkdnNest}.}
\item{start,end}{The left and right x coordinates for the bar or group of bars
to be displayed.}
\item{shrink}{The proportion to shrink the width of the bars at each level.}
\item{errbars}{Whether to display error bars on the bars.}
\item{intervals}{Whether to use offsets or absolute values when displaying
measures of dispersion.}
\item{col}{The colors to use to fill the bars. See Details.}
\item{labelcex}{Character size for the group labels.}
\item{lineht}{The height of a margin line in user units.}
\item{showall}{Whether to display the bars at any levels above the last.}
\item{Nwidths}{Whether to scale the widths of the bars to the number of
observations.}
\item{barlabels}{Optional labels to display below the bars.}
\item{showlabels}{Whether to display the labels below the bars.}
\item{arrow.cap}{The width of the "cap" on error bars in user units,
defaulting to 0.01 of the width of the plot.}
}
\value{nil}
\details{
\samp{drawNestedBars} displays the bars for the nested breakdown performed
by \samp{brkdnNest}. It starts at the top of the list and calls itself for
each level of the breakdown. It is unlikely to be useful for anything else.
The combination of \samp{showlabels=TRUE} and \samp{showall=FALSE} allows
the display of all of the labels below the plot with only the last set of
bars being displayed. To have a set of labels not displayed, pass explicit
\samp{barlabels} and have zero length labels for the level that is not to
have labels.
}
\author{Jim Lemon and Ofir Levy}
\seealso{\link{brkdnNest}, \link{drawNestedBars}}
\keyword{misc}
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