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    component boxplot, or as a single list containing such vectors.
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    component boxplot, or as a single list containing such vectors.
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    Alternatively a symbolic specification of the form \code{x ~ g} can
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    Alternatively a symbolic specification of the form \code{x ~ g} can
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    be given, indicating the the observations in the vector \code{x} are
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    be given, indicating the the observations in the vector \code{x} are
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    to be grouped according to the levels of the factor \code{g}.  In
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    to be grouped according to the levels of the factor \code{g}.  In
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    this case the argument \code{data} can be used to provide values for
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    this case the argument \code{data} can be used to provide values for
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    the variables in the specification.
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    the variables in the specification.
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    \code{NA}s are allowed in the data.}
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    \code{NA}s are allowed in the data.}
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  \item{range}{this determines how far the plot whiskers extend out from
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  \item{range}{this determines how far the plot whiskers extend out from
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    the box.  If \code{range} is positive, the whiskers extend to the
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    the box.  If \code{range} is positive, the whiskers extend to the
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    most extreme data point which is no more than \code{range} times the
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    most extreme data point which is no more than \code{range} times the
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    interquartile range from the box.
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    interquartile range from the box.
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    A value of zero causes the whiskers to extend to the data extremes.}
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    A value of zero causes the whiskers to extend to the data extremes.}
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  \item{width}{a vector giving the relative widths of the boxes making
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  \item{width}{a vector giving the relative widths of the boxes making
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    up the plot.}
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    up the plot.}
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  \item{varwidth}{if \code{varwidth} is \code{TRUE}, the boxes are drawn
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  \item{varwidth}{if \code{varwidth} is \code{TRUE}, the boxes are drawn
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    with widths proportional to the square-roots of the number of
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    with widths proportional to the square-roots of the number of
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    observations in the groups.}
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    observations in the groups.}
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  \item{notch}{if \code{notch} is \code{TRUE}, a notch is drawn in each
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  \item{notch}{if \code{notch} is \code{TRUE}, a notch is drawn in each
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    side of the boxes.  If the notches of two plots do not overlap then
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    side of the boxes.  If the notches of two plots do not overlap then
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    the medians are significantly different at the 5 percent level.}
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    the medians are significantly different at the 5 percent level.}
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  \item{names}{group labels which while be printed under each boxplot.}
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  \item{names}{group labels which while be printed under each boxplot.}
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  \item{data}{???}
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  \item{data}{???}
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  \item{plot}{if \code{TRUE} (the default) then a boxplot is produced.
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  \item{plot}{if \code{TRUE} (the default) then a boxplot is produced.
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    If not, the summaries which the boxplots are based on are returned.}
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    If not, the summaries which the boxplots are based on are returned.}
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  \item{border}{an optional vector of colors for the outlines of the
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  \item{border}{an optional vector of colors for the outlines of the
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    boxplots.  The values in \code{border} are recycled if the length of
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    boxplots.  The values in \code{border} are recycled if the length of
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    \code{border} is less than the number of plots.}
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    \code{border} is less than the number of plots.}
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  \item{col}{if \code{col} is non-null it is assumed to contain colors
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  \item{col}{if \code{col} is non-null it is assumed to contain colors
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    to be used to col the bodies of the box plots.}
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    to be used to col the bodies of the box plots.}
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  \item{log}{???}
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  \item{log}{???}
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  \item{pars}{???}
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  \item{pars}{???}
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  \item{\dots}{graphical parameters can also be passed as arguments to
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  \item{\dots}{graphical parameters can also be passed as arguments to
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}
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}
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\examples{
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\examples{
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data(insects)
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data(insects)
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boxplot(count ~ spray, data = insects, col = "lightgray")
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boxplot(count ~ spray, data = insects, col = "lightgray")
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}
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}
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\keyword{hplot}