\name{or.segSet}
\alias{or.segSet}
\alias{unionSeg}
\alias{or}
\alias{or.default}

\title{Union of 2 segments sets}
\description{
  Makes union of 2 segments sets
}
\usage{
or.segSet(a, b = NULL,simplify=TRUE,...)
unionSeg(a, b = NULL,simplify=TRUE,...)
}
%- maybe also 'usage' for other objects documented here.
\arguments{
  \item{a,b}{Elements of class segSet }
  \item{simplify}{TRUE of FALSE. If TRUE, segments are sorted, and
    duplicated are removed.
  }
  \item{...}{Unused}
}

\value{
  an element of class segment. 
}

\author{Antoine Lucas}

\seealso{\link{globalSeg},\link{or.globalSeg}}


\examples{
from <- c(100,75, 1 ,25,150)
to   <- c(110,120,30,50,170)
or(as.segSet(data.frame(from,to)))
## return:
## from, to
## 1, 50
## 75,120
## 150,170

or.segSet(data.frame(from,to),simplify=FALSE)



## Tip to compute intergenic region
## (imagine: from = genes$start, to=genes$stop

x <- or.segSet(data.frame(from,to))
start <- x[,1]
stop <- x[,2]
n <- length(start)
intergenes <-cbind(stop[1:n-1],start[2:n])
intergenes

}
\keyword{utilities}% at least one, from doc/KEYWORDS