You'll need to make three basic items: - An Individual class of some sort - A Species for the Individual - Appropriate breeding pipelines What I would do is subclass from GPIndividual and add in relevant parts from (say) IntegerVectorIndividual. But you'll have to do a fair bit of rewriring. This is not going to be easy for someone who's not a java expert, I'm afraid to say. :-( I'd try to whip one up for you but I have my hands full right now with family. Anyone else? On Nov 22, 2011, at 2:57 PM, Frederik wrote: > My goal (just as Ben I think) is indeed to evolve individuals that are part-tree and > part-vector. The problem is that I'm not a java expert and I don't really see > where to start. The main issue will be to create a new breeding class, is that > correct? > > Regards, > Frederik