Figure 8:

Common edge prediction metrics correlate with node degree. Five common edge prediction features (Supplementary Table S2) are correlated with node degree on the STRING PPI network [24]. All 5 features show a positive relationship with degree, although the magnitude of this correlation is highly variable. The preferential attachment index is understandably perfectly correlated because it is equal to the product of source and target degree. Each panel indicates the Pearson correlation (“r”) between feature and degree in the lower right corner.