[R] ROC Analysis

[Camille Leclerc]

Hi everybody,

I have a data set with a value and a status (positive or negative case) and
I want make a ROC Analysis. So, with ROCR Package, I have got the ROC curve
(True Positive Fraction [tpf] according 1-True Negative Fraction [1-tnf]).

http://r.789695.n4.nabble.com/file/n4469203/01.png 

But, now I want a new graphic which show the sum of true positive fraction
and true negative fraction according each value on my data set (tpf + tnf
according the values). 

http://r.789695.n4.nabble.com/file/n4469203/02.png 

If you have an idea !

Thank you very much for all help,
Camille Leclerc

--
Camille Leclerc, Master student
Lab ESE, UMR CNRS 8079
Univ Paris-Sud
Bat 362
F-91405  Orsay Cedex FRANCE



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