% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/methods.R, R/methods_row.R
\name{colVars,dgCMatrix-method}
\alias{colVars,dgCMatrix-method}
\alias{rowVars,dgCMatrix-method}
\title{Calculates the variance for each row (column) of a matrix-like object}
\usage{
\S4method{colVars}{dgCMatrix}(x, rows = NULL, cols = NULL, na.rm = FALSE)

\S4method{rowVars}{dgCMatrix}(x, rows = NULL, cols = NULL, na.rm = FALSE)
}
\arguments{
\item{x}{An NxK matrix-like object.}

\item{rows}{A \code{\link{vector}} indicating the subset of rows
(and/or columns) to operate over. If \code{\link{NULL}}, no subsetting is
done.}

\item{cols}{A \code{\link{vector}} indicating the subset of rows
(and/or columns) to operate over. If \code{\link{NULL}}, no subsetting is
done.}

are excluded first, otherwise not.}
}
\value{
}
\description{
Calculates the variance for each row (column) of a matrix-like object.
}
\details{
The S4 methods for \code{x} of type \code{\link{matrix}},
\code{matrixStats::rowVars}
/ \code{matrixStats::colVars}.
}
\examples{
mat <- matrix(rnorm(15), nrow = 5, ncol = 3)
mat[2, 1] <- NA
mat[3, 3] <- Inf
mat[4, 1] <- 0

print(mat)

rowVars(mat)
colVars(mat)
}
\seealso{
\itemize{
when the input is a \code{matrix} or \code{numeric} vector.
\item For mean estimates, see \code{\link[MatrixGenerics]{rowMeans2}()} and
\item For standard deviation estimates, see \code{\link[MatrixGenerics]{rowSds}()}.