[R] easiest way to put italics words in sentences plotted with text()?

[David Winsemius]

On Aug 9, 2013, at 7:22 PM, arun wrote:

> Hi,
> May be this gets you started:
> 
> plot(1,1,xlim=0:1,ylim=0:1)
> text(0.6,0.8, expression(M3:~italic(Homo)~paste(",", " 5 areas, 2 areas max",sep="")))
>  text(0.6,0.4, expression(M4:~italic(Pan)~paste(",", " 3 areas, 2 areas max",sep="")))
> 

The plotmath paste() function does not have a 'sep' argument. Here are two paste-free alternatives:

plot(1,1,xlim=0:1,ylim=0:1)
text(0.6,0.8, expression(M3:~italic(Homo)~", 5 areas, 2 areas max"))
text(0.6,0.4, expression(M4:~italic(Pan)~","~3~areas*","~2~areas~max))

commas need to be quoted since they are otherwise interpreted as separating distinct expressions. The "*" is  a spaceless searator.

-- 
David.


> A.K.
> 
> ----- Original Message -----
> From: Nick Matzke <matzke at berkeley.edu>
> To: R-help at r-project.org
> Cc: 
> Sent: Friday, August 9, 2013 10:05 PM
> Subject: [R] easiest way to put italics words in sentences plotted with	text()?
> 
> Hi,
> 
> I am plotting some labels that consist of strings in which 
> some words (but only some) should be in italics.
> 
> E.g.
> 
> "M3: Homo, 5 areas, 2 areas max"
> 
> "M4: Pan, 3 areas, 2 areas max"
> 
> I am putting these on the plot with the text() command.  The 
> words "Homo" and "Pan" should be italicized, since they are 
> genus names.  Is there some sneaky code to insert italics 
> for certain words?  I would rather not have to break up the 
> string and plot every word separately, or similar insanity.
> 
> Any help much appreciated!
> 
> Cheers,
> Nick
> 
> 
> 
> 
> -- 
> ====================================================
> Nicholas J. Matzke
> Ph.D. Candidate, Graduate Student Researcher
> 
> Huelsenbeck Lab
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> 
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David Winsemius
Alameda, CA, USA