Table 8.

Regression: positive vs. negative variables, Mean Absolute Error and Pearson Correlation Coefficient of the cross-validation on the train set.

Algorithm	Positive Variables		Negative Variables
	MAE	PCC	MAE	PCC
LASSO	8.05	0.16	4.41	0.83
EN	8.03	0.16	4.4	0.83
CART	9.96	0.23	6.12	0.69
KNN	8.47	0.1	4.37	0.8
SVR	8.19	0.15	4.69	0.81
MLP	9.88	0.08	7.74	0.62
AB	8.01	0.17	4.35	0.82
GB	8.04	0.28	4.34	0.82
RF	8.13	0.3	4.34	0.83
ET	8.14	0.33	4.18	0.84