[R] randomForest() question

[Peter Tait]

Hi,

I am trying to find some information on the strata option in randomForest(). 
I am hoping to make predictions from some clustered data (many predictors 
measured repeatedly on the same subject over time). I would like to apply 
random forests or gradient boosting ( gbm() ) to this problem but I have not 
found a way for these methods to account for the natural clustering in my 
data.

Any help would be greatly appreciated.

Cheers

Peter