[BioC] silly question about ROC curve

[James W. MacDonald]

James Anderson wrote:
> I am new to ROC curve, my understanding is that you need to change
> the threshold for the decision function to get a series of
> sensitivity and specificity. Does that mean for each type of
> classification algorithm, you need to go into that function to change
> the threshold of decision function to get ROC curve? Is there anyway
> that one can write a function so that no matter what kind of
> classification algorithm is used, it can plot roc curve? Could anyone
> refer me some available R package for ROC?

How about the ROC package?

> 
> Thanks,
> 
> James
> 
> 
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-- 
James W. MacDonald, M.S.
Biostatistician
Affymetrix and cDNA Microarray Core
University of Michigan Cancer Center
1500 E. Medical Center Drive
7410 CCGC
Ann Arbor MI 48109
734-647-5623


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