[R] Greek characters in plots

[Prof Brian Ripley]

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}}
>>
>> ______________________________________________
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>> 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