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\name{probabilityToSnpMatrix}
\alias{probabilityToSnpMatrix}
\title{Convert posterior genotype probability to a SnpMatrix object}
\description{
Convert a matrix of posterior genotype probabilites P(AA), P(AB),
P(BB) to a \link[snpStats:SnpMatrix-class]{SnpMatrix}.
}
\usage{
probabilityToSnpMatrix(probs)
}
\arguments{
\item{probs}{Matrix with three columns for the posterior probabilities
of the three genotypes: "P(A/A)", "P(A/B)", "P(B/B)". Each row must
sum to 1.}
}
\details{
\code{probabilityToSnpMatrix} converts a matrix of posterior
probabilites of genotype calls into a
\link[snpStats:SnpMatrix-class]{SnpMatrix}.
}
\value{
An object of class \code{"SnpMatrix"} with one row (one sample).
Posterior probabilities are encoded (approximately) as byte
values, one per SNP. See
the help page for \link[snpStats:SnpMatrix-class]{SnpMatrix} for complete
details of the class structure.
}
\author{
Stephanie Gogarten <sdmorris@u.washington.edu>
}
\seealso{
\link{genotypeToSnpMatrix},
\link[snpStats:SnpMatrix-class]{SnpMatrix}
}
\examples{
probs <- matrix(c(1,0,0,
0,1,0,
0,0,1,
NA,NA,NA),
ncol=3, byrow=TRUE,
dimnames=list(1:4,c("A/A","A/B","B/B")))
sm <- probabilityToSnpMatrix(probs)
as(sm, "character")
}
\keyword{manip}
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