Performance comparison of crossover operators for postfix genetic programming. (1st January 2014)

• Record Type: Journal Article
• Authors: Dabhi, Vipul K.; Chaudhary, Sanjay
• Is Part Of: International journal of metaheuristics. Volume 3:Number 3(2014)
• Page Start: 244
• Page End: 264
• Publication Date: 2014-01-01
• Subjects: GA-like one-point crossover -- sub-tree crossover -- semantic aware sub-tree crossover -- postfix genetic programming -- performance comparison; Heuristic algorithms -- Periodicals; 006.3105
• Languages: English
• ISSNs: 1755-2176

Abstract

In this article, we present three crossover operators for postfix-GP, a GP system that adopts postfix notation for an individual representation. These crossover operators are: GA-like one-point, sub-tree, and semantic aware sub-tree. The algorithm and implementation details for each of these crossover operators are presented. The operators are applied on a set of real-valued symbolic regression problems. The performance comparison of the crossover operators is carried out using two measures, number of successful runs and mean best adjusted fitness. The significance of the obtained results is tested using statistical test. The results suggest that semantic aware sub-tree crossover outperforms GA-like one-point and sub-tree crossovers on all problems.