Figure 2.

Hierarchical interaction graphs and interaction dendrogram.

Notes: (A) The values inside boxes indicate information gain (IG) of individual attributes or main effects, whereas values between the nodes exemplify IG of pairwise combinations of attributes or interaction effects. A positive entropy (plotted in red or orange) indicates interaction while a negative entropy (plotted in blue) indicates redundancy. (B) Interaction dendrogram shows that the red line represents synergy interaction and the green line represents synergy interaction more weakly. From left to right, the interaction was more intensive.