[R] Pruning trees in a Random Forest

Liaw, Andy andy_liaw at merck.com
Fri Mar 20 19:26:37 CET 2009


The way the trees are structured in randomForest, there's no way to stop
tree growth by depth (what you called level).

(If anyone has ideas, I'm all ears.)

Andy 

From: Anirudh Kondaveeti
> 
> Hi all!
> 
> The randomForest in R enables us to prune the trees using the nodesize
> feature where we can stop splitting a node if it contains 
> less than the
> specified no.of of records/entities at that node.
> 
> However is there a way to stop the tree growing after a 
> specified number of
> levels. To be more clear on what I mean by a level. Level 0 
> is the parent
> node, Level 1 has 2 daughter nodes, Level 2 has 4 daughter 
> nodes, Level 3
> has 8 daughter nodes etc.
> 
> Thanks in advance!
> 
> Anirudh Kondaveeti
> ----------------------------
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide 
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
> 
Notice:  This e-mail message, together with any attachme...{{dropped:12}}




More information about the R-help mailing list