[datatable-help] Random Forest

[Michael Smith]

Not sure whether I understand you correctly (and whether this is even a
data.table question), but maybe you are looking for `replicate`?

M


On 09/24/2014 02:55 PM, Hounkpatin Ozias wrote:
> Hello to everyone,
> 
> I am interested in doing some iteration in using Random Forest
> (classification purpose) with different value of mtry= 2, 4, 6, 9, 12. I
> want to repeat each run 100 times. that is with mtry=2 for example, run
> it 100 times. As output, I would like to have the aggregate out of bag
> errors (total means over the 100 runs) as well as well as the variable
> importance based on this 100 runs aggregated over their OBB errors. One
> could try it one by one, report each value but it is very laborious. Is
> there anyway to have R run the Random Forest 100 times, and give me as
> output the resulting (aggregated means) OOB errors and variable
> importance. here was my code. 
> 
> r2  <-  randomForest(Factor  ~  .,  data=tr, nodesize  = 1,ntree=1000,
> importance=TRUE, proximity=TRUE, mtry=2) 
> #I want a 100 run of this
> #get average OOB errors
> #get variable importance based on these aggregated OBB errors.
> 
> Thank you very much.
> 
> 
> 
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