HI, Using the example in ?combine library(randomForest) rf1 <- randomForest(Species ~ ., iris, ntree=50, norm.votes=FALSE) rf2 <- randomForest(Species ~ ., iris, ntree=50, norm.votes=FALSE) rf3 <- randomForest(Species ~ ., iris, ntree=50, norm.votes=FALSE) rf.all <- combine(rf1, rf2, rf3) lst1<- list(rf1,rf2,rf3)
rf.allL<- do.call(`combine`,lst1) #or rf.allL<- Reduce(`combine,lst1) identical(rf.all,rf.allL) #[1] TRUE A.K. Is there a quick and easy way to pass randomForest objects contained in a list into the combine() function? As a result of calling randomForest through lapply(), I now have 10 randomForests in a list (rfors) I want to combine all 10 of them. Understandably combine(rfors) doesn't work as it doesn't recognise the individual forests within the list. I have spend quite sometime messing around with unlist(), lapply() and apply() to try and extract the information in a suitable format but to no avail. The only thing that works is combine(rfors[[1]], rfors[[2]] ...etc). This is a bit cumbersome though, not least because the number of random forests I'll need to combine is likely to change. Any sleek and elegant solution to this someone can suggest? Thanks in advance for any help. Anna ______________________________________________ [email protected] 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.
