[R] randomForest maxnodes

Liaw, Andy andy_liaw at merck.com
Fri Jan 15 23:54:28 CET 2010


Please try to follow the posting guide and give a reproducible example,
as below:

R> library(randomForest)
randomForest 4.5-34
Type rfNews() to see new features/changes/bug fixes.
R> iris2 = iris[-5]
R> iris.rf = randomForest(Petal.Width~., iris2, maxnodes=4, ntree=50)
R> nodesize(iris.rf)
Error: could not find function "nodesize"
R> treesize(iris.rf)
 [1] 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
4 4 4 4
[39] 4 4 4 4 4 4 4 4 4 4 4 4

Andy
 

> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of Epic John
> Sent: Friday, January 15, 2010 4:50 PM
> To: r-help at r-project.org
> Subject: [R] randomForest maxnodes
> 
> Has anyone sucessfully used the maxnodes feature in 
> randomForest? I tried
> setting it, but when it is non-NULL I always get back a 
> forest in which all
> trees have size 1. I am using a continuous response 
> (regression). Any help
> would be appreciated.
> Thanks.
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
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> PLEASE do read the posting guide 
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
> 
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