[R] Help on Random forest [Broadcast]

Liaw, Andy andy_liaw at merck.com
Wed Oct 11 14:53:37 CEST 2006


Do provide a reproducible example, as the Posting Guide suggests.

Try:

library(randomForest)
example(predict.randomForest)
iris.pred <- predict(iris.rf, iris[ind == 2,], nodes=TRUE)
str(iris.pred)
attr(iris.pred, "nodes")

Andy
 

From: Rupendra
> 
> Hello all,
> 
> I am trying to explore random forest in R. What I want to do 
> is get the node number in which the case falls in the tree of 
> random forest. For that I am calling the predict method as:
> 
> learn.pred <- predict (learn.rf, 
> newdata=learn.data.x,norm.votes= TRUE,predict.all = TRUE, 
> nodes= TRUE,type="response")
> 
> Studying the manual of random forest, I suppose that 
> learn,pred$nodes should contain the node numbers, but there 
> is no attributes called nodes in learn.pred object.
> 
>  
> 
> I am not much experienced with R. Please help me to resolve 
> this issue.
> 
>  
> 
> Thanks in advance,
> 
> Rupendra 
>  
>  
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