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\name{nmissing}
\alias{nmissing}
\title{Number of missing genotypes}
\description{
Count the number of missing genotypes for each individual or each marker
in a cross.
}
\usage{nmissing(cross, what=c("ind","mar"))}
\arguments{
\item{cross}{An object of class \code{cross}. See
\code{\link[qtl]{read.cross}} for details.}
\item{what}{Indicates whether to count missing genotypes for each
individual or each marker.}
}
\value{
A vector containing the number of missing genotypes for each
individual or for each marker.
}
\author{Karl W Broman, \email{kbroman@biostat.wisc.edu} }
\examples{
data(listeria)
# plot number of missing genotypes for each individual
plot(nmissing(listeria))
# plot number of missing genotypes for each marker
plot(nmissing(listeria, what="mar"))
}
\seealso{ \code{\link[qtl]{summary.cross}},
\code{\link[qtl]{nind}}, \code{\link[qtl]{totmar}} }
\keyword{utilities}
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