ECJ has no built-in statistics for population diversity; and there are many such measures in the literature. You'd implement one in a Statistics subclass. Sean On Jan 5, 2006, at 2:38 PM, Peter Drake wrote: > Is there some easy way to measure population diversity built into > ECJ? I'd like to know when and to what extent my population is > converging. > > Thanks, > > Peter Drake > Assistant Professor of Computer Science > Lewis & Clark College > http://www.lclark.edu/~drake/