Predicting Nanobinder-Improved Unsaturated Soil Consistency Limits Using Genetic Programming and Artificial Neural Networks

Table 6

Accuracies of the developed GP and ANN models.

Soil property	Model no.	Output formula	Error %			R^2
			Training	Validation	Total	Training	Validation	Total
WL	1	Equation (1)	2.0	2.9	2.3	0.993	0.991	0.992
	2	Equation (4)	1.6	2.0	1.7	0.996	0.994	0.995
	3	Equation (7)	1.2	1.2	1.2	0.999	0.997	0.998
Wp	1	Equation (2)	2.3	2.9	2.5	0.972	0.967	0.969
	2	Equation (5)	2.1	2.7	2.3	0.975	0.970	0.972
	3	Equation (8)	1.9	2.2	2.0	0.982	0.977	0.979
Ip	1	Equation (3)	1.7	1.9	1.8	0.998	0.996	0997
	2	Equation (6)	1.5	1.8	1.6	0.998	0.996	0.997
	3	Equation (9)	1.5	1.5	1.5	0.999	0.997	0.998