To be more clear, My data set contains two classes.. Class 1 and Class 2 Class 1 has original data with 300 rows Class 2 is randomly generated data with 1500 rows.
I want to sample a new data set with Class 1 - all the rows Class 2 - only 300 rows out of 1500 rows and then use it in random forest with 500 trees. Also the Class 2 should have different 300 rows for different trees in the forest. Thanks! Anirudh Kondaveeti ---------------------------- On Fri, Mar 20, 2009 at 1:45 PM, Anirudh Kondaveeti < [email protected]> wrote: > sampsize uses the same sample for all the trees in the random Forest. > > But I want to use different sample for each tree of the 500 trees in the > random Forest. Thanks! > > > Anirudh Kondaveeti > ---------------------------- > > > 2009/3/20 Uwe Ligges <[email protected]> > > >> >> Anirudh Kondaveeti wrote: >> >>> Hi! >>> >>> I am dealing with random forest using R. >>> >>> Is there a way to sample a fixed no.of rows from a dataset for use with >>> different trees in random Forest. >>> To be more clear, my data set contains 1500 rows, and I am growing 500 >>> trees >>> in Random Forest >>> Is it possible to sample only 500 rows of data from the data set and use >>> it >>> for different trees in the forest. I mean each tree of the forest should >>> use >>> a different 500 rows from the data set. >>> >> >> >> See ?randomForest and the argument sampsize. >> >> Uwe Ligges >> >> >> >> >>> Thanks in advance! >>> >>> Anirudh Kondaveeti >>> ---------------------------- >>> >>> [[alternative HTML version deleted]] >>> >>> ______________________________________________ >>> [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. >>> >> > [[alternative HTML version deleted]] ______________________________________________ [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.
