NewChrBandTree and ChrBandTreeFromGraph provide
constructors for the ChrBandTree class.
NewChrBandTree(chip, univ)
ChrBandTreeFromGraph(g)univ is NULL, then all genes probed on the specified
chip will be in the universe. We strongly recommend using the set
of genes that remains after applying a non-specific filter as the
universe.graph instance as returned by makeChrBandGraphChrBandTree instance.
ChrBandTree-class