A Parabolic Failure Criterion for Transversely Isotropic Rock: Modification and Verification

Table 4

Evaluation errors for and by using different sets of data.

Data sets used for prediction	Bedding angles of samples used for prediction/°	Prediction errors for		Prediction errors for
		R^2	AAREP	R^2	AAREP
7	0, 15, 30, 45, 60, 75,90	0.926	9.09%	0.918	2.15%
6	0, 15, 30, 45, 60, 90	0.917	9.43%	0.865	2.78%
5	0, 30, 45, 60, 90	0.916	9.88%	0.841	2.84%
4	0, 30, 60, 90	0.911	10.22%	0.863	2.73%