Extended Evolutionary and Genetic Algorithms R package xega version 0.9.0.23 Implementation of a scalable, highly configurable, and e(x)tended architecture for (e)volutionary and (g)enetic (a)lgorithms. Multiple representations (binary, real-coded, permutation, and derivation-tree), a rich collection of genetic operators, as well as an extended processing pipeline are provided for genetic algorithms (Goldberg, D. E. (1989, ISBN:0-201-15767-5)), differential evolution (Price, Kenneth V., Storn, Rainer M. and Lampinen, Jouni A. (2005) <doi:10.1007/3-540-31306-0>), simulated annealing (Aarts, E., and Korst, J. (1989, ISBN:0-471-92146-7)), grammar-based genetic programming (Geyer-Schulz (1997, ISBN:978-3-7908-0830-X)), grammatical evolution (Ryan, C., O'Neill, M., and Collins, J. J. (2018) <doi:10.1007/978-3-319-78717-6>), and grammatical differential evolution (O'Neill, M. and Brabazon, A. (2006) in Arabinia, H. (2006, ISBN:978-193-241596-3). All algorithms reuse basic adaptive mechanisms for performance optimization. For 'xega''s architecture, see Geyer-Schulz, A. (2025) <doi:10.5445/IR/1000187255>. Sequential or parallel execution (on multi-core machines, local clusters, and high-performance computing environments) is available for all algorithms. See <https://github.com/ageyerschulz/xega/tree/main/examples/executionModel>. Software Depends: R (>= 3.5.0), parallelly, filelock Imports: xegaSelectGene, xegaBNF, xegaDerivationTrees, xegaGaGene, xegaGpGene, xegaGeGene, xegaDfGene, xegaPermGene, xegaPopulation (>= 1.0.0.12) Suggests: testthat (>= 3.0.0) Andreas Geyer-Schulz <Andreas.Geyer-Schulz@kit.edu> Comprehensive R Archive Network (CRAN) Andreas Geyer-Schulz [aut, cre] (ORCID: <https://orcid.org/0009-0000-5237-3579>) MIT + file LICENSE (https://CRAN.R-project.org/package=xega/LICENSE) 2026-02-17 application/tgz https://CRAN.R-project.org/package=xega doi:10.32614/CRAN.package.xega