Anjali Karve wrote:
> Hello,
>
> I have a classification tree. I want to obtain a ROC curve for this test.
> What is the easiest way to obtain one?
>
> -Anjali
ROC curves have a number of problems, chief among them leading to the
temptation of dichotomizing test results. ROC areas are useful
statistics though. In the Hmisc package see somers2 and rcorr.cens for
getting the ROC area nonparametrically.
Frank
--
Frank E Harrell Jr Professor and Chair School of Medicine
Department of Biostatistics Vanderbilt University
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