Dear David, Dear Friends, After any running svm I receive different results of Error estimation of 'svm' using 10-fold cross validation. What is the reason ? It is caused by the algorithm, libsvm , e1071 or something els? Which value can be optimal one ? How much run can reach to the optimality.And finally, what is difference between Error estimation of svm using 10-fold cross validation and MSE ( Mean Square Error ) ? So many thanks in advance for your help. Best Regards, Amir __________________________________________________ [[alternative HTML version deleted]]
Amir Safari wrote:> > Dear David, Dear Friends, > > After any running svm I receive different results of Error estimation of 'svm' using 10-fold cross validation. What is the reason ? It is caused by the algorithm, libsvm , e1071 or something els? Which value can be optimal one ? How much run can reach to the optimality.And finally, what is difference between Error estimation of svm using 10-fold cross validation and MSE ( Mean Square Error ) ? > So many thanks in advance for your help.10-fold cross validation chooses the traing/test sets randomly, hence you won't get the same results each time you run it ... Uwe Ligges> Best Regards, > Amir > > > > __________________________________________________ > > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at 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
> > Dear David, Dear Friends, > > After any running svm I receive different results of Error estimation > of 'svm' using 10-fold cross validation.using tune.svm(), or the `cross' parameter of svm()?> What is the reason ? It is caused by the algorithm, libsvm , e1071 or > something els?The splits are chosen randomly.> Which value can be optimal one?The Bayes Error.> How much run can reach to the optimality.What do you mean by `How much run'?> And finally, what is difference between Error estimation of svm using > 10-fold cross validation and MSE ( Mean Square Error ) ?the former is an error estimation _procedure_, the latter is an error _measure. Cheers, David