You forgot to put the comma after "-intrain" in the following assignment:
testing <- spam[-intrain, ] "make" is one of the data columns of spam dataset. > colnames(spam) [1] "make" -- GG [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.