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\name{rowQ}
\alias{rowQ}
\alias{rowQ,matrix,numeric-method}
\alias{rowQ,ExpressionSet,numeric-method}
\alias{rowMin}
\alias{rowMax}
\title{A function to compute empirical row quantiles.}
\description{
This function computes the requested quantile for each row of a matrix,
or of an \code{ExpressionSet}.
}
\usage{
rowQ(imat, which)
rowMax(imat)
rowMin(imat)
}
\arguments{
\item{imat}{Either a matrix or an \code{ExpressionSet}.}
\item{which}{An integer indicating which order statistic should be returned.}
}
\details{
\code{rowMax} and \code{rowMin} simply call \code{rowQ}
with the appropriate argument set.
The argument \code{which} takes values between 1, for the minimum per row,
and \code{ncol(imat)}, for the maximum per row.
}
\value{
A vector of length equal to the number of rows of the input matrix containing
the requested quantiles.
}
\author{R. Gentleman}
\seealso{
\code{\link{rowMedians}}.
\code{rowMeans()} in \code{\link[base]{colSums}}().
}
\examples{
data(sample.ExpressionSet)
rowMin(sample.ExpressionSet)
rowQ(sample.ExpressionSet, 4)
}
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