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

Salvatore Loguercio loguerci at scripps.edu
Wed Apr 3 00:59:29 CEST 2013

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.


>> 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
loguerci at scripps.edu

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