Il Fri, 06 Mar 2009 18:46:44 -0300, andrew cooke ha scritto: > i have not been following this discussion in detail, so someone may have > already explained this, but it should not be necessary to actually > construct the roulette wheel to select values from it. what you are > doing is selecting from a list where the there are different > probabilities of selecting different entries. i am pretty sure that can > be done more efficiently than by constructing a new list with many more > entries whose aim is to simulate that (which is what the roulette wheel > seems to be in your code, if i have understood correctly). > > more precisely, i think you can adapt the trick used to select a line at > random from a file by scanning the file just once. > > sorry if i have misunderstood, > andrew
Well, I believe that using the right distribution I can for sure find a better way for doing the roulette wheel selection. When I'll have enough time I'll pick up my statistics book. -- http://mail.python.org/mailman/listinfo/python-list
