[R] ctree (party) - select a specific variable in the first split

[Salvatore Loguercio]

Hi Achim,

Thank you for the quick suggestion. I actually did the first split 
manually, then grew two trees in the two subsets, it worked.

Best,
Sal

>> Hello,
>>
>> My question is related to ctree() function from the library 'party'.
> See fortune(58).

Yeah, package 'party' - sorry for the confusion.

>
>> Is there a way to force ctree() to use a specific variable in the first
>> split?
> No way that does this automatically.
>
>> I am asking because the first split contains two variables with very
>> similar scores, and choosing the alternative variable would induce a
>> tree somewhat easier to interpret.
> If both variables are closely correlated and you believe one of the
> variables to be more meaningful for partitioning, then omit the other from
> tree construction.
>
> Alternatively, you can grow two trees in the two subsets based on the




> first variable.
>
> hth,
> Z
>
>> Thanks,
>> Sal
>>
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-- 
Salvatore Loguercio, Ph.D.
Research Associate - Su Lab
Department of Molecular and
  Experimental Medicine
The Scripps Research Institute
http://sulab.org
loguerci at scripps.edu
858-784-2112