Revision be1f32e88ccfcece8d50dd4fd0391dac7aa44653 authored by Deepayan Sarkar on 17 December 2001, 00:00:00 UTC, committed by Gabor Csardi on 17 December 2001, 00:00:00 UTC
1 parent fd174ad
qq.Rd
\name{qq}
\alias{qq}
\title{ Quantile-Quantile Plots of Two Samples }
\description{
Quantile-Quantile plots for comparing two Distributions
}
\synopsis{
qq(formula, data = parent.frame(), aspect = "fill", layout = NULL,
panel = panel.qq, prepanel = NULL, scales = list(), strip = TRUE,
groups = NULL, xlab, xlim, ylab, ylim, f.value = ppoints,
..., subscripts = !is.null(groups), subset = TRUE)
}
\usage{
qq(formula, f.value = ppoints, ...)
}
\arguments{
\item{formula}{formula of the form \code{y ~ x | g1 * g2 * \ldots},
where \code{x} must be a numeric, and \code{y} can be a factor,
shingle, character or numeric vector, with the restriction that there
must be exactly two levels of \code{y}, which divide the values of
\code{x} into two groups. Quantiles for these groups will be plotted
along the two axes.
}
\item{f.value}{function of a single integer (representing sample
size), returning a vector of probabilities corresponding to which
quantiles should be plotted.}
\item{\dots}{Other arguments}
}
\value{
An object of class trellis, by default plotted by \code{print.trellis}.
}
\author{Deepayan Sarkar \url{deepayan@stat.wisc.edu}}
\note{The x and y scale limits are by default the ranges of the original
data, instead of the range of the actual quantiles that are to be
plotted. This will probably change later.}
\seealso{\code{\link{trellis.args}}, \code{\link{panel.qq}},
\code{\link{Lattice}}
}
\examples{
data(singer)
qq(voice.part ~ height, aspect = 1, data = singer,
subset = (voice.part == "Bass 2" | voice.part == "Tenor 1"))
}
\keyword{dplot}
![swh spinner](/static/img/swh-spinner.gif)
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