A Hybrid Genetic Programming Method in Optimization and Forecasting: A Case Study of the Broadband Penetration in OECD Countries

Table 23

Representation of the first five produced hGP models in fitting (Sweden).

Fitting performance—hGP models for Sweden
Model name	Model
hGP Model 1	0.316195914503/(1+E(−((−24.3613307631+((0.248179188862*t))−((+2856.86270612; −0.73365067168*(−7632.23570515−264.609582528*t))*((−188.226187141*(1/(1+E(−; (−11.2194594526−0.0269181697779*t)))))))))))
hGP Model 2	0.635230289913/(1+E(−((−859.98155469−13.6682736089*t))/(1+E(−(−0.246865293706; −0.112785107324*t))+(−645.208699231864.791617138+15.8723835928*t))))
hGP Model 3	0.322283774013/(1+E(−(0.0238625468755+0.297883008597*(12.8929141638; −(−134.989713256+2.79343973525*(98.6539018027−0.344395312981*t))/(1+E; (−(5.312543151582.46101246618−0.118615909978*t))+5.93885038216)))))
hGP Model 4	0.317301851063/(1+(E(−(−4.86018930519−1.40562027222+2.17969243374*E; (−(−225.362926623/(1+E(5.79151748628−0.00873094773031*t))))))))
hGP Model 5	0.317329645302*(1/(1+E((−(−6.28781400917+0.520317506477*(E(−((−22.2379905754; −21.8755007663−(−42.6520973363/(1+E(−(3.89062429403+0.258885588424; −0.00909501063577*t)))))))))))))