\HeaderA{plotFB}{FB-Plot}{plotFB}
\keyword{hplot}{plotFB}
\begin{Description}\relax
Creates foreground-background plots.
\end{Description}
\begin{Usage}
\begin{verbatim}
plotFB(RG, array=1, lim="separate", pch=16, cex=0.2, ...)
\end{verbatim}
\end{Usage}
\begin{Arguments}
\begin{ldescription}
\item[\code{RG}] an \code{RGList} object.
\item[\code{array}] integer giving the array to be plotted. Corresponds to columns of \code{R}, \code{G}, \code{Rb} and \code{Gb}.
\item[\code{lim}] character string indicating whether the red and green plots should have \code{"separate"} or \code{"common"} x- and y- co-ordinate limits.
\item[\code{pch}] vector or list of plotting characters. Defaults to integer code 16.
\item[\code{cex}] numeric vector of plot symbol expansions.
\item[\code{...}] any other arguments are passed to \code{plot}
\end{ldescription}
\end{Arguments}
\begin{Details}\relax
A foreground-background plot is a plot of log2-foreground vs log2-background for a particular channel on a particular two-color array.
This function produces a pair of plots, one for green and one for red, for a specified array.

See \code{\LinkA{points}{points}} for possible values for \code{pch}, \code{col} and \code{cex}.
\end{Details}
\begin{Value}
A plot is created on the current graphics device.
\end{Value}
\begin{Author}\relax
Gordon Smyth
\end{Author}
\begin{SeeAlso}\relax
An overview of diagnostic functions available in LIMMA is given in \LinkA{09.Diagnostics}{09.Diagnostics}.
\end{SeeAlso}