On Tue, 13 Apr 2004, Hui Han wrote: > Hi, > > I am doing feature selection for my dataset. The following is > the extreme case where only one feature is left. But I got > the error below. So my question is that do I have to use > more than one features? > > sample.subset > udomain.edu hpclass > 1 -1.0 not > 2 -1.0 not > 3 -0.2 not > 4 1.0 hp > 5 1.0 hp > > randomForest(hpclass ~., data=sample.subset, importance=TRUE); > Error in if (n == 0) stop("data (x) has 0 rows") : > argument is of length zero >
no idea about the error message, but there is no need for feature selection before using random forests - give it a try without preselection of variables. best Torsten > Best regards, > Hui Han > Department of Computer Science and Engineering, > The Pennsylvania State University > University Park, PA,16802 > email: [EMAIL PROTECTED] > homepage: http://www.cse.psu.edu/~hhan > > ______________________________________________ > [EMAIL PROTECTED] mailing list > https://www.stat.math.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html > > ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html