R help - Nov 2006 - Correlated ROC curves

Hi,

Is there any package or code to compare and display correlated ROC curves in
R?

Thanks,
Reza

	[[alternative HTML version deleted]]

one of the newsletters ( about a year ago ) has something about an ROC
package but I don't remember which one it is.
If you do a search for ROC on the search thing in www.project.org, I'm
sure you will find something
about it.


-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Seyed Reza
Jafarzadeh
Sent: Monday, November 06, 2006 3:30 PM
To: R-help; R-sig-Epi
Subject: [R] Correlated ROC curves

Hi,

Is there any package or code to compare and display correlated ROC
curves in R?

Thanks,
Reza

	[[alternative HTML version deleted]]

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Seyed Reza Jafarzadeh wrote:
> Hi,
> 
> Is there any package or code to compare and display correlated ROC curves
in
> R?
> 
> Thanks,
> Reza
There are ways to compare ROC areas.  This will not have very good 
power.  The Hmisc package's rcorrp.cens function provides a test that 
deals with pairs of pairs of predictions and observed outcomes that I 
feel has much more power.  It tests whether one predictor is 'more 
concordant' with the outcome than another.

-- 
Frank E Harrell Jr   Professor and Chair           School of Medicine
                      Department of Biostatistics   Vanderbilt University