This is a function of the OS set by your locale, and there is nothing we can do about it. It is done by the C call isalpha in do_makenames in src/main/character.c.
My Windows XP machine in Swedish does accept all three, using the CRAN-compiled version of rw1091.exe, so something is up with yours. Sorry, can't help. On Thu, 24 Jun 2004, Sixten Borg wrote: > Hello all, > > I upgraded from R 1.8.1 to 1.9.0 (Windows XP), and spotted an odd thing. > > The last three letters in the Swedish alphabet are å, ä and ö. (In case they don't > show correctly: they are a with a ring, a with two dots, and o with two dots (HTML: > å ä ö). > > When I use these as variable names in a data.frame, odd things happen: > In R 1.8.1, å (å) doesn't work while the others do. > In R 1.9.0, ö (ö) doesn't work while the others do. > > Please find examples below. It would be nice if all three could be used in variable > names. At least in Sweden :-) > > Thanks... > Sixten. > > # > # R 1.9.0: ö is renamed to X. > # > > > data.frame(a=1, å=2, ä=3, ö=4) > a å ä X. > 1 1 2 3 4 > > version > _ > platform i386-pc-mingw32 > arch i386 > os mingw32 > system i386, mingw32 > status > major 1 > minor 9.0 > year 2004 > month 04 > day 12 > language R > > > > > # > # R 1.8.1: å is renamed to X. > # > > > data.frame(a=1, å=2, ä=3, ö=4) > a X. ä ö > 1 1 2 3 4 > > version > _ > platform i386-pc-mingw32 > arch i386 > os mingw32 > system i386, mingw32 > status > major 1 > minor 8.1 > year 2003 > month 11 > day 21 > language R > > > # > > ______________________________________________ > [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 > > -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [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