[R] Getting Odds ratios for tree branches-CART model
Frank E Harrell Jr
f.harrell at vanderbilt.edu
Thu Dec 4 14:50:12 CET 2008
jestinah mahachie wrote:
> Dear all,
>> I have been using rpart to get trees. May someone help me with how I can do
>> some logistic regression modelling to derive odds ratios on the branches.
>> Also help on how to derive estimates on prediction error.
>> Kind Regards,
The odds ratios from rpart will be badly biased away from 1.0.
Unbiasing them will be tricky.
>> Home Address:
>> Brusselsepoortstraat 85
Frank E Harrell Jr Professor and Chair School of Medicine
Department of Biostatistics Vanderbilt University
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