Inproceedings,

Genetic Programming for Kernel-Based Learning with Co-evolving Subsets Selection

, , , and .
Parallel Problem Solving from Nature - PPSN IX, volume 4193 of LNCS, page 1008--1017. Reykjavik, Iceland, Springer-Verlag, (9-13 September 2006)
DOI: doi:10.1007/11844297_102

Abstract

Support Vector Machines (SVMs) are well-established Machine Learning (ML) algorithms. They rely on the fact that i) linear learning can be formalised as a well-posed optimisation problem; ii) nonlinear learning can be brought into linear learning thanks to the kernel trick and the mapping of the initial search space onto a high dimensional feature space. The kernel is designed by the ML expert and it governs the efficiency of the SVM approach. In this paper, a new approach for the automatic design of kernels by Genetic Programming, called the Evolutionary Kernel Machine (EKM), is presented. EKM combines a well-founded fitness function inspired from the margin criterion, and a co-evolution framework ensuring the computational scalability of the approach. Empirical validation on standard ML benchmark demonstrates that EKM is competitive using state-of-the-art SVMs with tuned hyper-parameters.

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