Fig. 24

Probability Density Function (PDF) of the error values for the four GEP models. Subplots (a)–(h) represent the error distributions for training and test datasets, respectively, with kernel smoothing or normal distribution fitting applied.

Probability Density Function (PDF) of the error values for the four GEP models. Subplots (a)–(h) represent the error distributions for training and test datasets, respectively, with kernel smoothing or normal distribution fitting applied.