[R] About Random Forests,ROC,Misclassified

[Max Kuhn]

This might help:

   http://www.jstatsoft.org/v28/i05/paper

Max

On Sun, Apr 18, 2010 at 1:24 PM, kevinzy <kevin.nuemann at googlemail.com> wrote:
>
> Hi,guys. i got a few questions about the R code during my self study of this
> language. plz help me ^_^
>
> for example,use the dataset Vanveer.4000 in library(MASS),
>
> 1.if i used the first 300 genes, how to find the single trees and random
> forests by using R? And how to see their classification performance?
>
> 2.how to compute the error rate by using 10-fold cross validation? and how
> to produce a ROC curve?
>
> 3.how to find the numbers of "good" outcome are misclassified?
>
> Thank you very much for your help.
>
>
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-- 

Max