On Wed, 23-Jun-2010 at 12:05AM -0700, azam jaafari wrote:
|> ?Hello
|> ?
|> I have questions about gbm package.??It seems we have to?devide data to two
part (training?set and test set) for first.
|> ?
|> 1- trainig set for?running of gbm function
|> 2- test set for?gbm.perf???
|> ?
|> is it rigth?
|> I have 123 sample that I devided 100 for trainig and 23 for test.
|> ?
|> So, parameter of?cv.folds?in gbm function is for what?
There's quite a lot to be known about how to use those functions. The
vignette gives a bit of an idea, but I came across this article which
helped me work out how to use them.
A working guide to boosted regression trees J. Elith,
J. R. Leathwick, T. Hastie Journal of Animal Ecology Volume 77 ,
Issue 4 , Pages802 - 813 Journal compilation © 2008 British
Ecological Society
HTH
--
~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.
___ Patrick Connolly
{~._.~} Great minds discuss ideas
_( Y )_ Average minds discuss events
(:_~*~_:) Small minds discuss people
(_)-(_) ..... Eleanor Roosevelt
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