Dear list, In some places (for example, http://en.wikipedia.org/wiki/Support_vector_machine) , the polynomail kernel in SVM is written as (u'*v + 1)^d, while in the document of svm() in e1071 package, the polynomial kernel is written as (gamma*u'*v + coef0)^d. I am a little confused here:
When doing parameter optimization (grid search or so) for polynomial kernel, does it need to tune four parameters, gamma, coef0, C and degree, or just two of them, C and degree (and fixing gamma to 1 and coef0 = 1)? Thanks, Wuming ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
