[R] ROC analysis

From: Eleni Christodoulou <elenichri_at_gmail.com>
Date: Wed, 19 Mar 2008 10:07:48 +0200


Hello list,

I am trying to perform ROC analysis and count the AUC in order to validate my results. I use package ROCR. I would like to count the AUC not under the cutoff found by "performance" but to use another cutoff that I calculate. How could I change the following command in order to get what I want? perform=performance(pred,measure="auc",x.measure="cutoff"), where pred is a prediction object.

Thank you very much,
Eleni

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