Table 3 Performance of GPR model with...

Table 3

Performance of GPR model with different training–testing data ratios

Group	Proportion	Stage	RMSE	R²	MAE	MAPE
A1	6:4	Train	0.09	0.87	0.06	22.03
A1		Test	0.08	0.92	0.05	15.11
A2		Train	0.09	0.88	0.06	33.06
A2		Test	0.05	0.97	0.04	15.95
A3		Train	0.09	0.87	0.06	20.54
A3		Test	0.07	0.94	0.04	12.77
A4		Train	0.11	0.83	0.07	22.79
A4		Test	0.09	0.90	0.06	20.07
A5		Train	0.10	0.85	0.05	21.23
A5		Test	0.04	0.98	0.02	10.29
B1	8:2	Train	0.06	0.94	0.02	8.08
B1		Test	0.03	0.98	0.02	6.12
B2		Train	0.08	0.91	0.04	17.89
B2		Test	0.05	0.96	0.03	12.41
B3		Train	0.08	0.91	0.05	17.89
B3		Test	0.04	0.97	0.03	9.40
B4		Train	0.07	0.94	0.04	15.09
B4		Test	0.08	0.92	0.06	19.23
B5		Train	0.08	0.92	0.05	18.32
B5		Test	0.05	0.96	0.03	12.16

Group	Proportion	Stage	RMSE	R²	MAE	MAPE
A1	6:4	Train	0.09	0.87	0.06	22.03
A1		Test	0.08	0.92	0.05	15.11
A2		Train	0.09	0.88	0.06	33.06
A2		Test	0.05	0.97	0.04	15.95
A3		Train	0.09	0.87	0.06	20.54
A3		Test	0.07	0.94	0.04	12.77
A4		Train	0.11	0.83	0.07	22.79
A4		Test	0.09	0.90	0.06	20.07
A5		Train	0.10	0.85	0.05	21.23
A5		Test	0.04	0.98	0.02	10.29
B1	8:2	Train	0.06	0.94	0.02	8.08
B1		Test	0.03	0.98	0.02	6.12
B2		Train	0.08	0.91	0.04	17.89
B2		Test	0.05	0.96	0.03	12.41
B3		Train	0.08	0.91	0.05	17.89
B3		Test	0.04	0.97	0.03	9.40
B4		Train	0.07	0.94	0.04	15.09
B4		Test	0.08	0.92	0.06	19.23
B5		Train	0.08	0.92	0.05	18.32
B5		Test	0.05	0.96	0.03	12.16

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