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Solving the exponential growth of symbolic regression trees in geometric semantic genetic programming

Published: 02 July 2018 Publication History

Abstract

Advances in Geometric Semantic Genetic Programming (GSGP) have shown that this variant of Genetic Programming (GP) reaches better results than its predecessor for supervised machine learning problems, particularly in the task of symbolic regression. However, by construction, the geometric semantic crossover operator generates individuals that grow exponentially with the number of generations, resulting in solutions with limited use. This paper presents a new method for individual simplification named GSGP with Reduced trees (GSGP-Red). GSGP-Red works by expanding the functions generated by the geometric semantic operators. The resulting expanded function is guaranteed to be a linear combination that, in a second step, has its repeated structures and respective coefficients aggregated. Experiments in 12 real-world datasets show that it is not only possible to create smaller and completely equivalent individuals in competitive computational time, but also to reduce the number of nodes composing them by 58 orders of magnitude, on average.

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cover image ACM Conferences
GECCO '18: Proceedings of the Genetic and Evolutionary Computation Conference
July 2018
1578 pages
ISBN:9781450356183
DOI:10.1145/3205455
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than the author(s) must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected].

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Publication History

Published: 02 July 2018

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Author Tags

  1. function simplification
  2. genetic programming
  3. geometric semantic genetic programming
  4. solution size
  5. symbolic regression

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Cited By

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  • (2024)Geometric semantic GP with linear scaling: Darwinian versus Lamarckian evolutionGenetic Programming and Evolvable Machines10.1007/s10710-024-09488-025:2Online publication date: 1-Jun-2024
  • (2024)An ensemble learning interpretation of geometric semantic genetic programmingGenetic Programming and Evolvable Machines10.1007/s10710-024-09482-625:1Online publication date: 11-Mar-2024
  • (2024)Cellular geometric semantic genetic programmingGenetic Programming and Evolvable Machines10.1007/s10710-024-09480-825:1Online publication date: 21-Feb-2024
  • (2024)Geometric semantic genetic programming with normalized and standardized random programsGenetic Programming and Evolvable Machines10.1007/s10710-024-09479-125:1Online publication date: 8-Feb-2024
  • (2024)SLIM_GSGP: The Non-bloating Geometric Semantic Genetic ProgrammingGenetic Programming10.1007/978-3-031-56957-9_8(125-141)Online publication date: 3-Apr-2024
  • (2023)A geometric semantic macro-crossover operator for evolutionary feature construction in regressionGenetic Programming and Evolvable Machines10.1007/s10710-023-09465-z25:1Online publication date: 8-Dec-2023
  • (2023)Denoising autoencoder genetic programming: strategies to control exploration and exploitation in searchGenetic Programming and Evolvable Machines10.1007/s10710-023-09462-224:2Online publication date: 8-Nov-2023
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  • (2023)Memetic Semantic Genetic Programming for Symbolic RegressionGenetic Programming10.1007/978-3-031-29573-7_13(198-212)Online publication date: 12-Apr-2023
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