a data frame with columns chromosome, coordinate, cn
y
a data frame with columns "chrom", "chromStart", "chromEnd", "name",
"gieStain"
z
a data frame with columns chromosome, start, end , segmean
genome
character string specifying UCSC genome to use
CNscale
Character string specifying if copy number calls supplied are
relative (i.e.copy neutral == 0) or absolute (i.e. copy neutral ==2). One of
"relative" or "absolute"