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2000

Size Fair and Homologous Tree Crossovers for Tree Genetic Programming

9 years 3 months ago
Size Fair and Homologous Tree Crossovers for Tree Genetic Programming
Abstract. Size fair and homologous crossover genetic operators for tree based genetic programming are described and tested. Both produce considerably reduced increases in program size (i.e. less bloat) and no detrimental effect on GP performance. GP search spaces are partitioned by the ridge in the number of program v. their size and depth. While search efficiency is little effected by initial conditions, these do strongly influence which half of the search space is searched. However a ramped uniform random initialisation is described which straddles the ridge. With subtree crossover trees increase about one level per generation leading to sub-quadratic bloat in program length.
William B. Langdon
Added 18 Dec 2010
Updated 18 Dec 2010
Type Journal
Year 2000
Where GPEM
Authors William B. Langdon
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