Figure 1From: Visualising associations between paired ‘omics’ data sets Correlation Circle plot. a) Coordinates of the X-variables on the plane defined by the first two variates U 1 and U 2. b) The correlation between two variables is positive if the angle is sharp cos(α)>0, negative if the angle is obtuse cos(θ)<0, and null if the vectors are perpendicular cos(β)≈0.Back to article page