R help - Feb 2010 - evaluate variable within expression - how?

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Try

text(.5, .5, bquote(bold(.(myText))))

  -Peter Ehlers

Mark Heckmann wrote:
> #  I want to plot bold text. The text should depend on a variable  
> containing a character string.
> 
> plot.new()
> text(.5, .5, expression(bold("Some text")))
> 
> # now I would like to do the same replacing "some text" by a
variable.
> 
> plot.new()
> myText <- "some text"
> text(.5, .5, expression(bold(myText)))
> 
> # This obviouyls does not work.
> # How can I combine substitute, parse, paste etc. do get what I want?
> # And could someone add a brief explanation what happens, as I find  
> parse, expression, deparse, substitute etc. not easy to understand.
> 
> Thanks,
> Mark
> 
> ???????????????????????????????????????
> Mark Heckmann
> Dipl. Wirt.-Ing. cand. Psych.
> Vorstra?e 93 B01
> 28359 Bremen
> Blog: www.markheckmann.de
> R-Blog: http://ryouready.wordpress.com
> 
> 
> 
> 
> 
> 	[[alternative HTML version deleted]]
> 
> 
> 
> ------------------------------------------------------------------------
> 
> ______________________________________________
> 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.
-- 
Peter Ehlers
University of Calgary

Hi,

Try with bquote,

plot.new()
myText <- "some text"
text(.5, .5, bquote(bold(.(myText))))

basically, bquote( .(myText) ) performs the substitution before
applying bold() (see ?bquote).

HTH,

baptiste


On 14 February 2010 17:36, Mark Heckmann <mark.heckmann at gmx.de>
wrote:
> # ?I want to plot bold text. The text should depend on a variable
> containing a character string.
>
> plot.new()
> text(.5, .5, expression(bold("Some text")))
>
> # now I would like to do the same replacing "some text" by a
variable.
>
> plot.new()
> myText <- "some text"
> text(.5, .5, expression(bold(myText)))
>
> # This obviouyls does not work.
> # How can I combine substitute, parse, paste etc. do get what I want?
> # And could someone add a brief explanation what happens, as I find
> parse, expression, deparse, substitute etc. not easy to understand.
>
> Thanks,
> Mark
>
> ???????????????????????????????????????
> Mark Heckmann
> Dipl. Wirt.-Ing. cand. Psych.
> Vorstra?e 93 B01
> 28359 Bremen
> Blog: www.markheckmann.de
> R-Blog: http://ryouready.wordpress.com
>
>
>
>
>
> ? ? ? ?[[alternative HTML version deleted]]
>
>
> ______________________________________________
> 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.
>
>

Hi Mark,

Try also:

plot(1:10)
text(2, 5, "Some text", font = 2)

HTH,
Jorge


On Sun, Feb 14, 2010 at 11:36 AM, Mark Heckmann <> wrote:
> #  I want to plot bold text. The text should depend on a variable
> containing a character string.
>
> plot.new()
> text(.5, .5, expression(bold("Some text")))
>
> # now I would like to do the same replacing "some text" by a
variable.
>
> plot.new()
> myText <- "some text"
> text(.5, .5, expression(bold(myText)))
>
> # This obviouyls does not work.
> # How can I combine substitute, parse, paste etc. do get what I want?
> # And could someone add a brief explanation what happens, as I find
> parse, expression, deparse, substitute etc. not easy to understand.
>
> Thanks,
> Mark
>
> –––––––––––––––––––––––––––––––––––––––
> Mark Heckmann
> Dipl. Wirt.-Ing. cand. Psych.
> Vorstraße 93 B01
> 28359 Bremen
> Blog: www.markheckmann.de
> R-Blog: http://ryouready.wordpress.com
>
>
>
>
>
>        [[alternative HTML version deleted]]
>
>
> ______________________________________________
> 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.
>
>
	[[alternative HTML version deleted]]