[R] Greek characters in plots

[emir.toktar at gmail.com]

Hi, you could try to do:

text(x,y, expression(paste("A) ",Delta,"stbA::cat"));   # uppercase 'D'elta
text(x,y, expression(paste("A) ",delta,"stbA::cat"));	#lowercase 'd'elta
or yet
text(x,y, "A) \\*DstbA::cat", vfont=c("serif", "plain"))
# here there are too many examples...
demo(plotmath)  

 'Alpha' - 'Omega'               uppercase Greek symbols, i.e.: "Alpha",
"Beta", ..."Gamma",...."Omega".
I hope that help you!

EToktar

> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of Gabor Grothendieck
> Sent: Tuesday, August 05, 2008 2:19 PM
> To: michael watson (IAH-C)
> Cc: r-help at 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) <michael.watson at bbsrc.ac.uk>:
> > OK, I am definitely struggling here.
> >
> > The text I am trying to plot isn't a mathematical expression, it's:
> >
> > A) ΔstbA::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:ripley at stats.ox.ac.uk]
> > Sent: 05 August 2008 12:40
> > To: michael watson (IAH-C)
> > Cc: Henrique Dallazuanna; r-help at 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:wwwhsd at gmail.com]
> >> Sent: 05 August 2008 12:17
> >> To: michael watson (IAH-C)
> >> Cc: r-help at 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) 
> >> <michael.watson at bbsrc.ac.uk> 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 at 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 at 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,                  ripley at stats.ox.ac.uk
> > 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 at 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 at 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.
>