Table 4.

The errors of the compared methods.

Error	RBFN	BPNN	IABC-BPNN	NFIS
RMSE	0.1246	0.0679	0.0024	0.0063
MAPE	0.1563	0.0917	0.0032	0.0055
R 2	0.6326	0.8405	0.9953	0.9152