[R] randomForest

Liaw, Andy andy_liaw at merck.com
Wed Sep 10 14:51:17 CEST 2008

Hi Kate,

Things that can reasonably be combined will appear in the combined
randomForest object.  Those that cannot are set to NULL.  I believe
variable importance is kept, and possibly (pseudo) r-squared as well.


> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of Kate Behrman
> Sent: Tuesday, September 09, 2008 1:53 PM
> To: r-help at r-project.org
> Subject: [R] randomForest
> I am combining many different random forest objects run on 
> the same data set
> using the combine ( ) function. After combining the forests I 
> am not sure
> whether the variable importance, local importance, and rsq 
> predictors are
> recalculated for the new random forest object  or are calculated
> individually for each tree ensemble? Is it  possible to  
> calculate these
> predictors for the new random forest object after calling the combine
> function? Any help would be greatly apprecaited. Thanks, Kate
> 	[[alternative HTML version deleted]]
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