Excellent, many thanks, that works a treat! But I don't understand how...
>bquote(.(tag) ~ Delta * .(suffix)) "A)" ~ Delta * "stbA::cat" Yet when I use: plot(1, main = bquote(.(tag) ~ Delta * .(suffix))) It works fine in the plot. Must be magic ;) -----Original Message----- From: Gabor Grothendieck [mailto:[EMAIL PROTECTED] Sent: Tue 05/08/2008 6:18 PM To: michael watson (IAH-C) Cc: r-help@r-project.org Subject: Re: [R] Greek characters in plots Try bquote / substitute as has been mentioned: tag <- "A)" suffix <- "stbA::cat" plot(1, main = bquote(.(tag) ~ Delta * .(suffix)))) 2008/8/5 michael watson (IAH-C) <[EMAIL PROTECTED]>: > OK, I am definitely struggling here. > > The text I am trying to plot isn't a mathematical expression, it's: > > A) ?stbA::cat > > This is biological notation for a particular mutation. The "A)" part is a > tag identifying the graph, and the "stbA::cat" bit is the gene that is > mutated. Both the tag and gene are set as variables in a loop, and only the > delta remains the same. > > As the text I am trying to plot isn't a mathematical expression, I seem to be > having trouble getting substitute() and expression() to do what I want. As > plotmath states "A mathematical expression must obey the normal rules of > syntax for any R expression", I fear I may be barking up the wrong tree! > > Thank you all for your help so far, but can someone please help me once more > and tell me how I can get the capital Delta symbol so I can use it in > non-mathematical text and strings for plotting? > > Thanks once again > > Mick > > -----Original Message----- > From: Prof Brian Ripley [mailto:[EMAIL PROTECTED] > Sent: 05 August 2008 12:40 > To: michael watson (IAH-C) > Cc: Henrique Dallazuanna; r-help@r-project.org > Subject: Re: [R] Greek characters in plots > > On Tue, 5 Aug 2008, michael watson (IAH-C) wrote: > >> Excellent! I even tried DELTA but not Delta.... > > ?plotmath says > > 'Alpha' - 'Omega' uppercase Greek symbols > > How could that be made clearer? > > (Note it carefully says Greek *symbols* not *character*: they are not the > same thing.) > >> Now, how do I go about pasting that with some text that I have in various >> other variables? > > Use substitute? E.g. > > substitute(expression(foo*Delta), list(foo=3)) > > (Some people prefer bquote, but that is just a wrapper for substitute in > R.) > >> >> -----Original Message----- >> From: Henrique Dallazuanna [mailto:[EMAIL PROTECTED] >> Sent: 05 August 2008 12:17 >> To: michael watson (IAH-C) >> Cc: r-help@r-project.org >> Subject: Re: [R] Greek characters in plots >> >> Try, >> >> expression(Delta) >> >> On Tue, Aug 5, 2008 at 8:14 AM, michael watson (IAH-C) >> <[EMAIL PROTECTED]> wrote: >>> Hi >>> >>> I am running an R script that creates 100s of graphs, and I need to use >>> the greek CAPITAL letter delta in the mtext() function. >>> >>> I got as far as expression(delta) but this gives me the lowercase >>> version. >>> >>> Can anyone help? I'm using R 2.7 on Windows XP >>> >>> Mick >>> >>> Head of Informatics >>> Institute for Animal Health >>> Compton >>> Berks >>> RG20 7NN >>> 01635 578411 >>> >>> http://www.iah.ac.uk/research/bioinformatics/bioinf.shtml >>> >>> The information contained in this message may be confide...{{dropped:14}} >>> >>> ______________________________________________ >>> 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. >>> >> >> >> >> -- >> Henrique Dallazuanna >> Curitiba-Paraná-Brasil >> 25° 25' 40" S 49° 16' 22" O >> >> ______________________________________________ >> 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. >> > > -- > 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 > > ______________________________________________ > 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. > ______________________________________________ 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.
