A Machine Learning Approach to Predict Air Quality in California

Table 6

Error metrics from CO forecasting models in the training and validation sets.

Error metrics	PCA SVR-RBF		SVR-RBF
	Training set	Validation set	Training set	Validation set
MAE	0.119	0.311	0.080	0.211
R^2	0.948	0.769	0.976	0.868
RMSE	0.184	0.492	0.128	0.367
nRMSE	0.032	0.076	0.022	0.057