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Value of C in EVOSVM

c1borgc1borg Member Posts: 17  Maven
edited November 2018 in Help
Hi what would be a good starting value for the C parameter when starting to use the EVOSVM learner, I am using 0,0 and its still running after 11 hrs.  Failing this can I use grid parameter optimisation in RM and if so how.

Answers

  • haddockhaddock Member Posts: 849  Guru
    G'Day,
    what would be a good starting value for the C parameter when starting to use the EVOSVM learner, I am using 0,0 and its still running after 11 hr
    .

    What is remarkable about your question is that there is an example of C optimisation for SVM in the samples! Can you not find it? For values of C check out http://www.csie.ntu.edu.tw/~cjlin/papers/guide/guide.pdf.






  • landland RapidMiner Certified Analyst, RapidMiner Certified Expert, Member Posts: 2,531   Unicorn
    Hi,
    the EvoSVM has many advantages, but it has a great disadvantage about the other SVM implementations: It's a little bit slower. If you need greatest performance, you should change to the LibSVM or JMySVM if you don't need the specialties of the evolutionary approach.

    Greetings,
      Sebastian
  • c1borgc1borg Member Posts: 17  Maven
    Thanks guys for the excellent info.
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