> -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of David Winsemius > Sent: Wednesday, January 04, 2012 9:53 AM > To: Uwe Ligges > Cc: r-help@r-project.org; suse > Subject: Re: [R] subscript with comma > > > On Jan 4, 2012, at 10:51 AM, Uwe Ligges wrote: > > > > > > > On 04.01.2012 16:12, suse wrote: > >> Hi, > >> > >> I want to write a word with subscript in a graph. Unfortunately, the > >> subscript contains a comma, so all my trials didn't work and I > >> didn't find > >> how to do it. > >> I want to write "sm" as normal text and "w,grass" in the subscript. > >> Can > >> anybody help me? > >> > >> And a more general question: I read the help to "plotmath", but I > >> still > >> didn't understand, how it works. Is there a good documentation, > >> book,... > >> which explains all this stuff? > > I've wondered about that, too. Murrell's text, R Graphics, doesn't > even have plotmath in its function list or Index. The insight that > allowed me to get a significantly higher frequency of success was > realizing that the correct separators between separate expressions > were "*" and "~" rather than <space> or <comma>. Inside an expression > a comma will signal a new expression element. A space without a > plotmath operator intervening just throws an error > > > plot(1, main=expression(sm[w grass])) > Error: unexpected symbol in "plot(1, main=expression(sm[w grass" > > My suggestion is to search the archive for answers from Ligges, > Dalgaard, Lumley and Grothendeick that involve "expression" or > plotmath. (Apologies to any other plotmath-meisters). I still get > surprises such as with these: > > plot(1, main=expression(sm[w|grass])) > > plot(1, main=expression(sm[w%|%grass])) > > > > > > ?plotmath suggests to use a comma separated list as in: > > > > plot(1, main=expression(sm[list(w,grass)])) > > > > The other approach that succeeds it just to use a quoted comma > connected by valid separators. > > plot(1, main=expression(sm[w*","~grass])) > > -- > > David Winsemius, MD > West Hartford, CT >
I haven't followed this whole thread and may have missed some requirement, but what about just using the text string that you want in the subscript? E.g. plot(1, main=expression(sm['w,grass'])) Hope this is helpful, Dan Daniel J. Nordlund Washington State Department of Social and Health Services Planning, Performance, and Accountability Research and Data Analysis Division Olympia, WA 98504-5204 ______________________________________________ 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.
