A New Hybrid Model for Hourly Solar Radiation Forecasting Using Daily Classification Technique and Machine Learning Algorithms

Table 5

Performance of the ML models using two types of training sets.

Error metrics	Original training set		New training subsets
	SVR	RF	SVR	RF
RMSE (W/m^2)	38.80	85.77	37.64	84.17
nRMSE (%)	9.15	42.19	8.88	41.40
MAE (W/m^2)	19.72	50.19	19.17	50.25
nMAE (%)	4.65	24.69	4.52	24.72
AIC	24974	18631	13664	18622