Table 9.

August 2019, CO, NO₂, PM10, LR, ANN, RF.

Pollutant, Algorithm (Input Features)	${\mathit{R}}^2$		RMSE
	Calibration	Test	Calibration	Test
CO, LR (raw)	0.861		0.048
CO, ANN (raw, RH, T)	0.894	0.885	0.039	0.047
CO, RF (raw, RH, T)	0.978	0.927	0.019	0.033
NO2, LR (raw)	0.671		11.286
NO2, ANN (raw, RH, T)	0.940	0.767	4.590	10.130
NO2, RF (raw, RH, T)	0.961	0.817	3.620	9.460
PM10, LR (raw)	0.664		8.740
PM10, ANN (raw, RH, T)	0.813	0.678	6.985	8.664
PM10, RF (raw, RH, T)	0.967	0.731	2.882	7.935