Models statistics.

Model	r 2 training set	q 2 training set	r 2 test set	MSEa training set	MSEa test set	MAEb training set	MAEb test set	MAPEc training set	MAPEc test set
3D-field	0.88	0.75	0.73	0.13	0.29	0.31	0.45	4.21	6.24
SVM	0.99	0.74	0.73	0.01	0.30	0.06	0.44	0.84	6.21
kNN	0.66	0.66	0.49	0.38	0.56	0.48	0.56	6.75	7.70
RF	0.89	0.64	0.63	0.11	0.41	0.22	0.52	2.96	7.20
RVM	0.89	0.73	0.69	0.12	0.34	0.29	0.40	3.93	5.44

^aMean squared forecast error.

^bMean absolute forecast error.

^cMean absolute percentage forecast error.