[R] About Random Forests,ROC,Misclassified

[kevinzy]

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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