Figure 7
The panel a shows fitness, M A P E divided by R 2, against generation from 1 to 25 for repetitions 2, 3, 7, and 9. Large fluctuations occur during the first 10 generations, with peaks reaching about 45. After generation 10, all curves decrease and approach 0. The enlarged view for generations 23 to 25 shows values near 0.25, 0.30, 0.50, and 0.85. Panel b shows fitness against generation for repetitions 1, 2, 6, and 9. Several peaks exceed 50 during the first 7 generations, followed by a rapid decline towards 0. The enlarged view for generations 23 to 25 shows values near 0.40, 0.45, 0.45, and 0.70. Panel c shows fitness against generation for repetitions 2, 4, 5, and 7. Sharp peaks occur before generation 7, with values reaching about 50, after which all curves remain close to 0. The enlarged view for generations 23 to 25 shows values clustered near 0.20 to 0.30. Panel d shows fitness against generation for repetitions 3, 5, 6, and 7. Several early peaks reach about 50 before all curves decrease and remain near 0 after generation 7. The enlarged view for generations 23 to 25 shows values near 0.10, 0.20, 0.75, and 0.85. Panel e shows fitness against generation for repetitions 2, 3, 4, and 8. Early generations contain peaks up to about 50, followed by rapid convergence towards 0. The enlarged view for generations 23 to 25 shows values near 0.20, 0.35, 0.40, and 0.80. Panel f shows fitness against generation for repetitions 1, 2, 6, and 7. Peaks reach about 50 during the first 6 generations, after which all curves decrease and remain close to 0. The enlarged view for generations 23 to 25 shows values near 0.15, 0.15, 0.35, and 0.60.Fitness - generations training process for six models: (a) Model W-TAvg, (b) Model W-TMin, (c) Model W-TMax, (d) Model S-TAvg, (e) Model S-TMin, (f) Model S-TMax