[R] comparing two ROCs
lixiao82 at gmail.com
Mon May 18 17:32:49 CEST 2009
> Dear R-helper,
> I am trying to compare two AUCs derived from same population, but one
> is derived by adding extra features on top of the other. I found the
> codes below from R-help. I would like to know, in my case, whether I
> could use cROC, and also how can I got the right correlation (r)?
> I have been back to the original paper(Hanley 1983). It suggested to
> calculate rN(correlation coefficient for the discriminant value for +1
> labeled value) and rA(correlation coefficient for the discriminant
> value for -1 labeled value) and then calculate the average correlation
> and look up the Table they provided (row: average correlation, column:
> average AUC). However, in that Table the Average AUC need to be bigger
> than 0.70, which limits the search (always need to have average AUC
> larger than 0.70). Would you please suggested some way to calculate
> the correlation ?
> Thank you very much!
> From: Bernardo Rangel Tura
>> Date: Thu 16 Dec 2004 - 07:30:37 EST
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