[R] Writing custom functions for rpart

From: hadley wickham <h.wickham_at_gmail.com>
Date: Wed, 09 May 2007 14:42:39 +0200


Hi everyone,

Does anyone has experience with (or documentation for) writing custom methods with rpart? The documentation hints: "Alternatively, 'method' can be a list of functions 'init', 'split' and 'eval'", but doesn't provide any details as to what those methods should do or what arguments they should take etc.

I've tried looking at the package source (and the source for the S code it came from) but I can't follow what's going on in C vs R, and as the default methods are coded in a different way, there are no examples to follow.

Thanks,

Hadley



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