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 <shidaxia@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
>
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-- 
Sincerely,
Changbin
--

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