This is just one single decision tree, not forest. If you're asking what package I use to construct one single tree, it's 'rpart'.
> >From: Changbin Du <changb...@gmail.com> >To: "Shi, Tao" <shida...@yahoo.com> >Cc: r-help@r-project.org >Sent: Fri, May 14, 2010 12:35:20 PM >Subject: Re: [R] "rpart": how to use each variable only once? > >>is this random decision tree, I dont know is there any package can run it. >>If you know, please let me know. > > > > >On Fri, May 14, 2010 at 10:23 AM, Shi, Tao <shida...@yahoo.com> wrote: > >Hi list, >> >>>>Is there a way in "rpart" to force the variables only used once when doing >>>>the splits? >> >>>>This is how the question came about. Often time, the tree constructed uses >>>>the same variable (say X1) for the first and second splits, for example. >>>>However, due to practical reason, the researcher doesn't like this. The >>>>prefer to see the second split using other variables (say X2). Therefore >>>>the question. I understand the performance will suffer. However if there >>>>is a performance improvement for the tree with X1 as 1st split and X2 as >>>>2nd split comparing the tree with one single split using X1, I guess it's >>>>still a reasonable thing to do, right? >> >>>>Many thanks! >> >>>>...Tao >> >>>>______________________________________________ >>R-help@r-project.org mailing list >>https://stat.ethz.ch/mailman/listinfo/r-help >>>>PLEASE do read the posting guide http://www.R-project.org/posting-guide.html >>>>and provide commented, minimal, self-contained, reproducible code. >> > > >-- >Sincerely, >Changbin >-- > > > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
