\name{fold}
\alias{fold}
\title{Folding routine}
\description{
  Folds the sequence and returns the minimum free energyin kcal/mol; the
  mfe structure in bracket notation is returned.
}

\usage{
fold(s,t=37)
}

\arguments{
\item{s}{Sequence (character string)}
\item{t}{Temperature (double)}
}

\value{
  a list with
  \item{Energy}
  \item{Structure}
}

\examples{
  s <- "TTAGCTCAATTGGTAAAGACCCTAGGCGAAGCTTAGAGGTCGCCGGTT"
  fold(s)
  dotPlot(s,file="dot.ps")
  rnaPlot(s,file="rna.ps")
  }
  
\references{http://www.tbi.univie.ac.at/~ivo/RNA/}
\keyword{utilities}
\seealso{\code{\link{dotPlot}},\code{\link{rnaPlot}}}