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0.06144
2007 Mar 06
0
rpart-question regarding relation between cp and rel error
Dear useRs,
I may be temporarily (I hope :-)) confused, and I hope that someone can
answer this question that bugs me at the moment:
In the CP table of rpart, I thought the following equation should hold:
rel error = rel error(before) - (nsplit - nsplit(before)) * CP(before),
where (before) always denotes the entry in the row above.
While this equation holds for many rows of the CP tables