[Retracted] Prediction of the Least Principal Stresses Using Drilling Data: A Machine Learning Application

Table 3

Summary of the performance of the developed ANN-based models.

Model	Training Process			Testing Process
	R-value	MAPE (%)	RMSE	R-value	MAPE (%)	RMSE
σmin	0.98	0.36	60.37	0.97	0.29	48.57
σmax	0.96	0.74	136.25	0.96	0.75	129.51