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. 2023 Jan 16;9(1):e12947. doi: 10.1016/j.heliyon.2023.e12947

Figure 3.

Figure 3

Cross Validation scheme of a model, where PG stands for Patient Group, kj refers to the hyperparameters tuple of a model, and ϕ stands for the metric utilized for the optimization problem. Patient group test set (PG6) is fitted with optimum hyperparameters obtained from CV. Notice that each PG corresponds to a disjoint group of patients.