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-Original Message-
From: Tobias Guennel [mailto:[EMAIL PROTECTED]
Sent: Monday, February 19, 2007 3:40 PM
To: 'r-help@stat.math.ethz.ch'
Subject: [R] User defined split function in rpart
Maybe I should explain my Problem a little bit more detailed.
The rpart package allows for user
Maybe I should explain my Problem a little bit more detailed.
The rpart package allows for user defined split functions. An example is
given in the source/test directory of the package as usersplits.R.
The comments say that three functions have to be supplied:
1. "The 'evaluation' function. Called
Dear R community,
I am trying to write my own user defined split function for rpart. I read
the example in the tests directory and I understand the general idea of the
how to implement user defined splitting functions. However, I am having
troubles with addressing the data frame used in calling rp
Dear R community,
I am trying to write my own user defined split function for rpart. I read
the example in the tests directory and I understand the general idea of the
how to implement user defined splitting functions. However, I am having
troubles with addressing the data frame used in calling
Dear all,
I'm trying to manage with user defined split function in rpart
(file rpart\tests\usersplits.R in
http://cran.r-project.org/src/contrib/rpart_3.1-34.tar.gz - see bottom of
the email).
Suppose to have the following data.frame (note that x's values are already
sorted)
> D
y x
1 7 0.428
2
In the function rpart, users can define their own split function by
creating functions init, eval, and split.
For method='anova', I have examples of these functions.
I would like to create these functions for the case method='class'.
Does anyone know how the init, eval, and split functions would be
