Gabor Grothendieck wrote: > > Regarding the convenience it occurs in expressions like this: > > iris2 <- subset(iris, select = - Species) > > to create a data frame without the Species column. >
aha! so what's you best guess about the result here: d = data.frame(a = 1) d$`-b` = 2 names(d) # here we go subset(d, select = -b) # to b or not to b? b = "a" subset(d, select = -b) # tragedy d$b = 3 subset(d, select = -b) # catharsis (for whatever reason a user may choose to have a column named '-b') vQ ______________________________________________ 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.
