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European Conference on Genetic Programming

EuroGP 2012: Genetic Programming pp 170–181Cite as

An Ecological Approach to Measuring Locality in Linear Genotype to Phenotype Maps

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Part of the book series: Lecture Notes in Computer Science ((LNTCS,volume 7244))

Abstract

Recent research has considered the role of locality in GP representations. We use a modified statistical technique drawn from numerical ecology, the Mantel test, to measure the locality of integer-encoded GP. Weak locality is identified in a case study on Cartesian Genetic Programming (CGP), a directed acyclic graph representation. A method of varying syntactic program locality continuously through the application of a biased mutation operator is demonstrated. The impact of varying locality under the new measure is assessed over a randomly generated set of polynomial symbolic regression problems. We observe that enforcing higher levels of locality in CGP is associated with poorer performance on the problem set and discuss implications in the context of existing models of GP genotype-phenotype maps.

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Author information

Authors and Affiliations

  1. Department of Electronics, University of York, YO10 5DD, UK

    Tom Seaton, Julian F. Miller & Tim Clarke

Authors
  1. Tom Seaton
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  2. Julian F. Miller
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  3. Tim Clarke
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Editor information

Editors and Affiliations

  1. School of Computer Science, University of Birmingham, B15 2TT, Edgbaston, Birmingham, UK

    Alberto Moraglio

  2. INESC-ID Lisboa, Rua Alves Redol 9, 1000-029, Lisboa, Portugal

    Sara Silva

  3. Institute of Computing Science, Poznań University of Technology, Piotrowo 2, 60-965, Poznań, Poland

    Krzysztof Krawiec

  4. Faculty of Sciences and Technology, Department of Informatics Engineering, University of Coimbra, Pólo II - Pinhal de Marrocos, 3030, Coimbra, Portugal

    Penousal Machado

  5. ETSI Informática, Universidad de Málaga, Campus de Teatinos, 29071, Málaga, Spain

    Carlos Cotta

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© 2012 Springer-Verlag Berlin Heidelberg

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Seaton, T., Miller, J.F., Clarke, T. (2012). An Ecological Approach to Measuring Locality in Linear Genotype to Phenotype Maps. In: Moraglio, A., Silva, S., Krawiec, K., Machado, P., Cotta, C. (eds) Genetic Programming. EuroGP 2012. Lecture Notes in Computer Science, vol 7244. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-29139-5_15

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  • DOI: https://doi.org/10.1007/978-3-642-29139-5_15

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-29138-8

  • Online ISBN: 978-3-642-29139-5

  • eBook Packages: Computer ScienceComputer Science (R0)

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