Table 10.

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

Pollutant, Algorithm (Input Features)	${\mathit{R}}^2$		RMSE
	Calibration	Test	Calibration	Test
CO, LR (raw)	0.946		0.068
CO, ANN (raw, RH, T)	0.969	0.968	0.052	0.062
CO, RF (raw, RH, T)	0.991	0.949	0.028	0.067
NO2, LR (raw)	0.828		13.761
NO2, ANN (raw, RH, T)	0.893	0.875	10.880	11.820
NO2, RF (raw, RH, T)	0.988	0.914	3.698	9.786
PM10, LR (raw)	0.786		16.492
PM10, ANN (raw, RH, T)	0.910	0.819	4.550	9.570
PM10, RF (raw, RH, T)	0.977	0.824	5.623	8.940