Notice the number of true negatives has no impact on the F1-score; thus, the F1 score of performance focuses on the truly anomalous response vectors. by BO colored by the corresponding value of the objective, Λ(ν i , γ i ). The initial hyperparameter pair (ν 0 , γ 0 ), chosen randomly, is marked by a green x. The optimal (ν, γ), acquired on the 32 nd step, is marked by a red x.