search for: polynomail

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 parame...

...ailcode=2,cencode=0) where censaeb is the censoring indicator which is coded 1 for the event of interest (time to treatment failure), 2 for the competing risk and 0 for the censored value. Can anyone suggest how I can effectively combine these situations i.e. is there a way to apply the fractional polynomail transformation to the variable to assertain whether the transformation improves the model fit? I've tried the following code but it doesn't actually transform the variable: fitf=crr(nearmb$with.Withtime,censaeb,as.matrix(fp(nearmb$all.firstint)),failcode=2,cencode=0) Thank you for your he...

Dear statistitians / R users, I was told to analyse the effects of the four factors using lm or update for aov. The following is the result from lm. As you can see that in the last few lines enclosed coefficients. 1)Does this mean I can write a formula, like yield =0.26 + 0.03*H + 1.48*T + 0.04*L + 0.004*C 2) in the two levels design, is there any difference between I use (-1, 1) to