On Sat, Jul 27, 2013 at 3:08 PM, Duncan Murdoch <murdoch.dun...@gmail.com> wrote: > Your question is a little ambiguous. All characters are allowed in object > names, but the parser will only recognize some of them if they are quoted in > backticks. > > The ones it recognizes without the backticks are ones that the C isalnum() > (or iswalnum()) function declares to be alphanumeric, plus . and _. Your > list above are all allowed, but locales are allowed to declare other > characters to be alpha. I wouldn't recommend using anything else, because > your code won't be recognized in other locales. > > The definitive reference for this is the source code, specifically > src/main/gram.y. There's some discussion in the Intro to R manual, section > 1.8. > Exactly what I was looking for. Thank you, Liviu
______________________________________________ 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.