Dear all, I am trying to reproduce Koza's performance curves for some typical GP problems implemented in ECJ, but I had a limited success. Some problems such as simple regression have similar performance curves compared with the ones shown in Koza I, while others (for instance, Santa Fe trail or even 5 parity with ADFs) yields very different curves. In theory, should ECJ examples generate the same performance curves than those shown in Koza I/II?. Thanks in advance, David -- David F. Barrero Departamento de Automática Universidad de Alcalá Tlf: (34) 91-885-69-20 Web : http://atc1.aut.uah.es/~david/ Jabber/GTalk: [log in to unmask] Skype: dfbarrero Escuela Politécnica Departamento de Automática Despacho E-236 Ctra. Madrid-Barcelona km 31,600 28871 Alcalá de Henares. Madrid --