Dear Terry,
Thanks for pointing me to your vignette. I can't say that I fully
understand it however. I'd be grateful for your help with a couple of
specific questions:
* In my application, each potential split will be a function of the
outcome (y), as well as two other variables (p1 and
Look at the rpart vignette "User written split functions". The code allows you to add
your own splitting method to the code (in R, no C required). This has proven to be very
useful for trying out new ideas.
The second piece would be to do your own cross-validation. That is, turn off the buil
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