Clustering of 15 brain and 16 liver RNA-seq experiments from 4 different studies. 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). Brain and liver 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