Modelling of the Elasticity Modulus for Rock Using Genetic Expression Programming

Table 3

Regression coefficient values for univariate nonlinear regression analysis.

Models	Independent variable
		RN
Linear	0.518	0.356	0.409	0.570
Logarithmic	0.494	0.262	0.373	0.507
Inverse	0.463	0.071	0.094	0.350
Quadratic	0.548	0.356	0.419	0.576
Cubic	0.547	0.358	0.421	0.582
Compound	0.580	0.415	0.453	0.667
Power	0.589	0.530	0.613	0.719
S	0.588	0.282	0.299	0.639
Growth	0.580	0.415	0.453	0.667
Exponential	0.580	0.415	0.453	0.667
Logistic	0.580	0.415	0.453	0.667