Dear all
Recently, I asked the following questions :
I want to assess the performance of the discrimination using ROC plot. It is
possible to do it with S-Plus? is there a library where I can find it?
Here are a summary of the answers :
1. 1. You can find in Design and Hmisc libraries (written by Harrel) at the
following address , http://lib.stat.cmu.edu/S/Harrell/
you will find ROC plot with lrm function (logistic regression) ...
You need to use following call :
library(Hmisc,T)
library(Design,T)
f <- lrm(y ~ x1 + x2 + ..., x=T,y=T)
validate(f,B=150)
Dxy = 2(C-.5) where C=ROC area
2. Elizabeth Atkinson send mo some functions to do it .
And many thanks for people that answer me.
Stephanie
__________________________________________________________________________
* Stephanie Blanc- Manel * stephanie.manel@univ-pau.fr
* Département d'Ecologie
* Universite de Pau et des pays de l'Adour
* UFR Sciences et Technologie * Tél : 33(0)5/59/59/02/72
* 1 rue de Donzac * Fax : 33(0)5/59/59/19/36
* 64100 Bayonne FRANCE
___________________________________________________________________________
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