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Hi, I found there is no RankSelection in default ECJ, so I would like to share one I used with my work. Most part of my implementation is the based on the BestSelection by Sean Luke, except the fitness is replaced by the rank of individuals. Parameter rank.n may be used to limite the range of selection as used in BestSelection, and "pick-worst" may also be used to reverse the selection probability. *Be sure to change the package path to fit your environment before using it. Ting