Figure 3

Pairwise-Pearson correlation (PPC) analysis of HDACs and co-factors in glioma samples.
Unsupervised hierarchical clustering was carried out on pairwise Pearson gene-to-gene correlations using heatmap.2 from the R package gplots. Correlation coefficient equal to 1 represents the correlation of each gene to itself and is shown in red with the highest intensity. Negative correlations are shown in a light (poor correlation) to dark (strong correlation) blue color scale. The analysis was performed for all tumors together (GL, ODII and ODIII) (A), or separately for ODIII (B) and GL (C).