Fig. 4

Tree ensembles performance. ROC curves for individual trees and three ensembles using four validation datasets. A sample was classified as hypoxic when the mean probability given by the trees surpassed a given threshold between 0 and 1. Black dots represent TPR/FPR values for a probability threshold of 0.5 to classify a sample as hypoxic. A–C ROC curves for the individual trees selected for their performance. A Tree #125 (Fig. 3A). B Tree #241 (Fig. 3B). C Tree #42 (Fig. 3C). D–E ROC curves for three tree ensembles. D all 276 trees. E top 20 trees by medium F₁-score. F three selected trees (#125, #241, #42)