Table 2.

Results of the fitted models for predicting the weight of plum fruits (FW) from their length (L) and diameter (D) values in the 2019 dataset.

Model configuration	Model coefficients		RMSE (gr)		R 2
	a	b	Train	Test	Train	Test
FW = a + b(L×D)	-4.4940	0.0225	0.4947	0.5046	0.9343	0.9214
FW = a + b(L3)	1.2440	0.0005	0.9593	0.9449	0.7537	0.7252
FW = a + b(D3)	1.8260	0.0005	0.7278	0.7099	0.8583	0.8446
FW = a + b(L×D2)	0.5766	0.0006	0.5001	0.5071	0.9331	0.9205
FW = a + b(D×L2)	0.2421	0.0006	0.5969	0.5907	0.9046	0.8922