Correlation Matrix

http://www.livestockgenomics.csiro.au/Genome_to_Phenome/

A correlation matrix is another type of graphic tool that is used to show the correlation or linear relationship between two variables. The graph that I have selected above demonstrates the “heat map of the tissue to tissue correlation matrix. Thick lines separate cancerous from normal tissues. The spectrum goes from blue (correlation <= -0.45) to white (-0.05 < correlation <= 0.05) to red (correlation > 0.45).”