Fig. 4From: A new concordant partial AUC and partial c statistic for imbalanced data in the evaluation of machine learning algorithmsThe concordance matrix and ROC plot. a The proposed concordance matrix visualizes how the c statistic is computed—as the proportion of correctly ranked pairs (green) out of all pairs. b The empirical ROC plot (above) equals the border in the concordance matrix (left), visualizing the known equivalence between the c statistic and the AUCBack to article page