Mental stress recognition using interpretable machine learning models with heart rate variability among Chinese university students

Figure 3 The performance of six machine learning algorithms. Receiver operating characteristic curve (left) and confusion matrix (right). A: Random forest; B: EXtreme Gradient Boosting; C: K-Nearest Neighbors; D: Light Gradient Boosting Machine; E: Support Vector Machine; F: Naive Bayes. AUC: Area under the curve; ROC: Receiver operating characteristic; RF: Random forest; XGBoost: EXtreme Gradient Boosting; KNN: K-Nearest Neighbors; LightGBM: Light Gradient Boosting Machine; SVC: Support Vector Machine; NB: Naive Bayes.