Chromosome 8 from the Pollack et al. example. Number of regions of gain with at least 0.50 probability shared by at least two arrays (i.e., pREC-S, freq.arrays = 2, p
= 0.50). The arrays are ordered according to tumor grade. Arrays with grade III share many more alterations between them than the other arrays. Four arrays with grade II share the same gains in copy number with tumors of higher grade, so they are probably related. There is one array unidentified.