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  \item{p}{vector of probabilities.}
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  \item{p}{vector of probabilities.}
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  \item{nn}{number of observations. If \code{length(nn) > 1}, the length
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  \item{nn}{number of observations. If \code{length(nn) > 1}, the length
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    is taken to be the number required.}
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    is taken to be the number required.}
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  \item{n}{number(s) of observations in the sample(s).  A positive
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  \item{n}{number(s) of observations in the sample(s).  A positive
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    integer, or a vector of such integers.}
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    integer, or a vector of such integers.}
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  \item{log, log.p}{logical; if TRUE, probabilities p are given as log(p).}
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  \item{log, log.p}{logical; if \code{TRUE}, probabilities
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    are given as logarithms.}
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  \item{lower.tail}{logical; if TRUE (default), probabilities are
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  \item{lower.tail}{logical; if \code{TRUE} (default), probabilities are
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    \eqn{P[X \le x]}, otherwise, \eqn{P[X > x]}.}
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    \eqn{P[X \le x]}, otherwise, \eqn{P[X > x]}.}
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}
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}
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\value{
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\value{
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  \code{dsignrank} gives the density,
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  \code{dsignrank} gives the density,
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  \code{psignrank} gives the distribution function,
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  \code{psignrank} is the cumulative distribution function,
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  \code{qsignrank} gives the quantile function, and
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  \code{qsignrank} is the quantile function, and
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  \code{rsignrank} generates random deviates.
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  \code{rsignrank} generates random deviates.
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  The length of the result is determined by \code{nn} for
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  The length of the result is determined by \code{nn} for
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  \code{rsignrank}, and is the maximum of the lengths of the
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  \code{rsignrank}, and is the maximum of the lengths of the
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  numerical arguments for the other functions.
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  numerical arguments for the other functions.
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  The numerical arguments other than \code{nn} are recycled to the
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  The numerical arguments other than \code{nn} are recycled to the
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  length of the result.  Only the first elements of the logical
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  length of the result.  Only the first elements of the logical
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  arguments are used.
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  arguments are used.
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}
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}
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\details{
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\details{
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\seealso{
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\seealso{
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  \code{\link{wilcox.test}} to calculate the statistic from data, find p
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  \code{\link{wilcox.test}} to calculate the statistic from data, find p
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  values and so on.
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  values and so on.
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  \link{Distributions} for standard distributions, including
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  \link{Distributions} for standard distributions, including
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  \code{\link{dwilcox}} for the distribution of \emph{two-sample}
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  \code{\link{dwilcox}} for the distribution of the \emph{two-sample}
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  Wilcoxon rank sum statistic.
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  Wilcoxon rank sum statistic.
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}
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}
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\examples{
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\examples{
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require(graphics)
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require(graphics)
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