\HeaderA{cdfMergeToQuartets}{Function to re-arrange CDF groups values in quartets}{cdfMergeToQuartets}
\keyword{programming}{cdfMergeToQuartets}
\keyword{internal}{cdfMergeToQuartets}
\begin{Description}\relax
Function to re-arrange CDF groups values in quartets.

This \code{\LinkA{function}{function}} is design to be used with \code{\LinkA{applyCdfGroups}{applyCdfGroups}}()
on an Affymetrix Mapping (SNP) CDF \code{\LinkA{list}{list}} structure.

Note, this requires that the group values have already been
arranged in PMs and MMs.
\end{Description}
\begin{Usage}
\begin{verbatim}cdfMergeToQuartets(groups, ...)\end{verbatim}
\end{Usage}
\begin{Arguments}
\begin{ldescription}
\item[\code{groups}] A \code{\LinkA{list}{list}} structure with groups.
\item[\code{...}] Not used.
\end{ldescription}
\end{Arguments}
\begin{Value}
Returns a \code{\LinkA{list}{list}} structure with the two groups \code{forward}
and \code{reverse}, if the latter exists.
\end{Value}
\begin{Author}\relax
Henrik Bengtsson (\url{http://www.braju.com/R/})
\end{Author}
\begin{References}\relax
[1] Affymetrix, \emph{Understanding Genotyping Probe Set Structure}, 2005.
\url{http://www.affymetrix.com/support/developer/whitepapers/genotyping_probe_set_structure.affx}\\
\end{References}
\begin{SeeAlso}\relax
\code{\LinkA{applyCdfGroups}{applyCdfGroups}}().
\end{SeeAlso}

