Density distribution of the correlation coefficients between GE and CN for the GBM dataset. Purple represents the number of gene loci that present significant correlation (r ≥ 0.60) between gene expression and copy number signals, counted considering all the samples. Blue are the rest, not considered significant.
Fontanillo et al. BMC Genomics 2012 13(Suppl 5):S5 doi:10.1186/1471-2164-13-S5-S5