Clustering of 4 liver carcinoma, 9 leukemia and 7 blood RNA-seq experiments from ENCODE project. Heatmap shows hierarchical clustering of the samples and top one percent of the gene features based on Pearson correlation coefficient (distance function for hierarchical clustering is 1-correlation). Three samples are clearly separated and functional annotations confirm the accuracy of the selected gene features.
Ozer et al. BMC Genomics 2012 13(Suppl 8):S11 doi:10.1186/1471-2164-13-S8-S11