R help - Sep 2008 - 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]]

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.

Best,
Andy
> -----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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