R help - Nov 2006 - random forest regression

Dear all,

 I am doing a regression in ramdomForest, using the option "sampsize"
reduce
the number of records used to produce the randomForest object.
The manual says "For classification, if sampsize is a vector of the length
the number of strata, then sampling is stratified by strata, and the
elements of sampsize indicate the numbers to be drawn from the strata".  I
need my sampling to be done with factors, but I am doing a regression. Does
anyone know a way to do that?

Thanks,

Naiara.

	[[alternative HTML version deleted]]

One way is to graft the stratified sampling code from the classification
part onto the regression part.  I will get to it eventually, but just
not now.

Andy 

From: Naiara Pinto
> 
> Dear all,
> 
>  I am doing a regression in ramdomForest, using the option 
> "sampsize" reduce the number of records used to produce the 
> randomForest object.
> The manual says "For classification, if sampsize is a vector 
> of the length the number of strata, then sampling is 
> stratified by strata, and the elements of sampsize indicate 
> the numbers to be drawn from the strata".  I need my sampling 
> to be done with factors, but I am doing a regression. Does 
> anyone know a way to do that?
> 
> Thanks,
> 
> Naiara.
> 
> 	[[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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