Fig. 2
From: Drug repositioning of herbal compounds via a machine-learning approach
Calculation of classification features for drug-disease associations. a An example of drug-disease associations considered as gold standard. b From known drug-disease associations, classification features were calculated using the similarity scores between the drugs and diseases of each association type. c Then, similarity scores of each association were combined into a Cartesian product, resulting in a total of 12 features, and the maximum value was selected to represent the query association