arrangeSideBySide       Helper function to arrange two trellis objects
                        side by side on a grid.
centromere              Coordinates of centromere
getCytoband             getCytoband
plotIdiogram            Plots idiogram for one chromosome
xypanel                 A panel function for plotting copy number
                        versus physical position
xypanelBaf              Panel function for plotting copy number and B
                        allele frequencies for a genomic interval.
xyplot                  Plot copy number and physical position for a
                        set of genomic intervals.
xyplotLrrBaf            xyplot lattice function for RangedData and
                        oligoSnpSet objects
