\HeaderA{crosshybFilter}{Removing from exon array gene/exon level probe sets characterized by cross hybridization with other transcripts}{crosshybFilter}
\keyword{methods}{crosshybFilter}
\begin{Description}\relax
XHYB field is mainly an indicator of weak assignment between a transcript cluster and the assigned mRNA, suggesting a potential crosshyb,
CRSSHYB is a measure of the promiscuity of the probes within a probe set among transcribed sequences.
\begin{enumerate}
\item 1 unique. All probes in the probe set perfectly match only one sequence in the putatively
transcribed array design content. The vast majority of probe sets are unique.  
\item 2 similar.   All the probes in the probe set perfectly match more than one sequence in 
the putatively transcribed array design content.
\item 3 mixed. The probes in the probe set either perfectly match or partially match more than one sequence 
in the putatively transcribed array design content. 
\end{enumerate}
XHYB and CRSSHYB  are used to remove probe sets characterized by multiple hybridization of exon probes
\end{Description}
\begin{Usage}
\begin{verbatim}
crosshybFilter()
\end{verbatim}
\end{Usage}
\begin{Author}\relax
Raffaele A Calogero
\end{Author}

