Coupling a Bat Algorithm with XGBoost to Estimate Reference Evapotranspiration in the Arid and Semiarid Regions of China

Table 3

Parameter values of the Bat-XGBoost algorithm.

Parameter	Value
Population	50
Max generation	200
A	0.98
R	0.98
nrounds	[20, 2000]
Min_child_weight	[1, 15]
Eta	[0.01, 0.3]