\HeaderA{fis.element-methods}{Performs *set* membership on two Massvectors}{fis.element.Rdash.methods}
\aliasA{fis.element,Massvector,Massvector-method}{fis.element-methods}{fis.element,Massvector,Massvector.Rdash.method}
\aliasA{fis.element,numeric,numeric-method}{fis.element-methods}{fis.element,numeric,numeric.Rdash.method}
\keyword{methods}{fis.element-methods}
\keyword{manip}{fis.element-methods}
\begin{Description}\relax
Performs *set* membership on two Massvectors
\end{Description}
\begin{Arguments}
\begin{ldescription}
\item[\code{obx}] see below in \bold{Methods} section
\item[\code{oby}] see below in \bold{Methods} section
\item[\code{error}] measurement error in \emph{e.g.} Da or as relative error
in parts per million (ppm)
\item[\code{ppm}] if \code{TRUE} then error in parts per million(ppm), in
arbitrary units otherwise.
\item[\code{uniq}] if \code{TRUE} compute non-crossing matching.
\end{ldescription}
\end{Arguments}
\begin{Value}
returns a vector of class \code{logical}
\end{Value}
\begin{Section}{Methods}
\describe{
\item[obx = "numeric", oby = "numeric"] :
\item[obx = "Massvector", oby = "Massvector"] :
}
\end{Section}
\begin{Examples}
\begin{ExampleCode}
data(pldata)
pl1 <- pldata[[1]]
pl2 <- pldata[[4]]
fis.element(pl1[,1,drop=TRUE],pl2[,1,drop=TRUE],error=0.1,ppm=FALSE)
fis.element(pl1,pl2,error=0.1,ppm=FALSE,uniq=FALSE)
\end{ExampleCode}
\end{Examples}

