simpleKey.Rd
\name{simpleKey}
\alias{simpleKey}
\title{ Function to generate a simple key }
\description{
Simple interface to generate a list appropriate for \code{draw.key}
}
\usage{
simpleKey(text, points = TRUE,
rectangles = FALSE,
lines = FALSE,
col, cex, font,
fontface, fontfamily,
lineheight, \dots)
}
\arguments{
\item{text}{
character or expression vector, to be used as labels for levels of
the grouping variable
}
\item{points}{ logical }
\item{rectangles}{ logical }
\item{lines}{ logical }
\item{col, cex, font, fontface, fontfamily, lineheight}{
Used as top-level components of the list produced, to be used for
the text labels. Defaults to the values in
\code{trellis.par.get("add.text")}
}
\item{\dots}{
further arguments added to the list, eventually passed to
\code{draw.key}
}
}
\details{
A lattice plot can include a legend (key) if an appropriate list is
specified as the \code{key} argument to a high level Lattice function
such as \code{xyplot}. This key can be very flexible, but that
flexibility comes at the cost of this list being very complicated even
in simple situations. The \code{simpleKey} function is a shortcut,
which assumes that the key is being drawn in conjunction with the
\code{groups} argument, and that the default Trellis settings are
being used. At most one each of points, rectangles and lines can be
drawn.
See also the \code{auto.key} argument for high level plots.
}
\value{
A list that would work as the \code{key} argument to \code{xyplot}
etc.
}
\author{ Deepayan Sarkar \email{Deepayan.Sarkar@R-project.org}}
\seealso{
\code{\link{draw.key}}, \code{\link{xyplot}}, \code{\link{Lattice}}
}
\keyword{dplot}