From: Dror > > Hi, > I'm working with randomForest package and i have 2 questions: > 1. how can i drop a specific tree from the forest?
Answered in another post. > 2. i'm trying to get the voting of each tree in a prediction > datum using the > folowing code > > pr<-predict(RF,NewData,type="prob",predict.all=TRUE) > my forest has 300 trees and i get lower number of votes: > > length(pr$individual) > [1] 275 > > RF > Call: > randomForest(formula = RFformula, data = adult, ntree = 300, > mtry = 1, > keep.forest = TRUE) > Type of random forest: classification > Number of trees: 300 > No. of variables tried at each split: 1 > Am i doing something wrong? how can i know which of the 300 > trees didn't > cast a vote? Hope this example is clear: R> iris.rf = randomForest(Species~., iris, ntree=148) R> iris.p = predict(iris.rf, iris, predict.all=TRUE) R> str(iris.p$individual) chr [1:150, 1:148] "setosa" "setosa" "setosa" "setosa" "setosa" ... - attr(*, "dimnames")=List of 2 ..$ : chr [1:150] "1" "2" "3" "4" ... ..$ : NULL R> length(iris.p$individual) [1] 22200 Andy > Thanks in advance > Dror > -- > View this message in context: > http://n4.nabble.com/Random-Forest-tp1557464p1571952.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > Notice: This e-mail message, together with any attachme...{{dropped:10}} ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
