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\name{propbrk}
\alias{propbrk}
\title{Calculate the proportion of specified values in a vector}
\description{
Calculates the proportion of values in a vector that are equal to a specified
value.
}
\usage{
propbrk(x,trueval=TRUE,na.rm=TRUE)
}
\arguments{
\item{x}{a character, factor or numeric vector.}
\item{trueval}{the value to be matched in \samp{x}.}
\item{na.rm}{whether to remove NA values.}
}
\details{
\samp{propbrk} calculates the proportion of values matching a specified value.
It is mainly to allow proportions to be calculated in the \samp{brkdnNest}
function.
}
\value{nil}
\author{Jim Lemon}
\seealso{\link{brkdnNest}}
\examples{
propbrk(sample(LETTERS,100,TRUE),trueval="M")
}
\keyword{misc}
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