\name{rangeColMeans}
\alias{rangeColMeans}
\title{Calculate column means for multiple ranges...}
\usage{rangeColMeans(bounds, x)
}
\description{Calculate column means for multiple ranges}
\details{Essentially colMeans with a loop, all in a .Call. Designed to take a
2-column matrix of row indices, bounds, for a matrix, x, and calculate
mean for each range in each column (or along a single vector). bounds
matrix need not cover all rows.}
\value{A numeric matrix or vector, matching the form of x. One row for
each row in bounds, one col for each col of x and appropriate dimnames.
If x is a vector, just a vector with names from the rownames of bounds.}
\author{Peter M. Haverty \email{phaverty@gene.com}}
\arguments{\item{bounds}{A two column integer matrix of row indices}
\item{x}{A numeric matrix with rows corresponding to indices in bounds.}
}