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Happy New Year! Yes, it should be breed.elite.0=2 The tutorial had not been updated to reflect a change we had made in a recent revision of the system. You can double-check to see that this parameter is being used with -p print-params=true If you're having the _best_ standardized fitness of the generation increasing occasionally despite elitism, yes, this would imply a bug. There have been bugs in the elitism before, so I'd be interested if you can provide a stripped-down version for us to stare out. Also if you can get the problem to occur on a unix box it'd be helpful. Sean On Dec 31, 2004, at 11:14 PM, Grant Morgan wrote: > I tried setting elitism as instructed in the tutorial "breed.elite = > 2", but > on furthor searching found "breed.elite.0 = 2" and this does cause the > object state.breeder.elite[0]=2 in my debugger when running tutorial4 > but > still get raw fitness increasing on some generations (I am using > 1.4.2_06 VM > on a windozs machine). Does this mean elitism is not working? Is there > a way > to set elitism on? > > Cheers, > Grant