Fig. 1From: Survival marker genes of colorectal cancer derived from consistent transcriptomic profilingSymmetric heatmaps representing the similarity between the overall gene expression signal of the samples compared with each other. Each heatmap is composed of 210 samples (30 × 7, 30 samples random selected from each batch, i.e. from each one of the 7 GSE datasets). The samples of each batch are identified by a color in the top bar below the top dendrograms (following the colors legend). Each heatmap represents a different preprocessing and normalization method performed to merge the datasets in one batch. The methods applied were: a RMA; b RMA plus ComBat; c fRMA; d fRMA plus ComBat; e fRMA plus scaling of the data using mean-centered expression valuesBack to article page