Fig. 6

Image from [33] illustrating the relative efficiency of CatBoost, according to Huang et al. Level 1 is 10 years’ data from a single station, Level 2 is 10 years’ data from 12 stations, Level 3 is 20 years’ data from 12 stations, Level 4 is 30 years’ data from 12 stations and Level 5 is 40 years’ data from 12 stations