On Dec 12, 2014, at 5:32 AM, Prof Brian Ripley wrote:

> The only symbols plotmath has access to are those in the Adobe Symbol 
> encoding.  You can display all of those using the example at the bottom of 
> ?points, as ?plotmath did tell you.  (So it was a rather rich asking for an 
> example.)
> 
> It also tells you that on some devices/platforms you can use Unicode escapes.
> 
> Now TeX (not LaTeX) does not define exactly which glyph \mapsto should 
> output, but Unicode \u21A6 is often called 'mapsto' (how Unicode glyphs are 
> rendered is font-specific, of course).  That works for me with cairo-based 
> devices on Linux; however on my Mac that glyph is not in the standard fonts 
> for Quartz-based devices.

I did observe that I got failure to get that glyph to appear on a quartz or 
cairo_pdf device using either points() or text()  but this command did produce 
an error message that was able to find the glyph in the console font:

> points(1,.8,"\u21A6")
Error in plot.xy(xy.coords(x, y), type = type, ...) : invalid plot type '‚'
In addition: Warning message:
In plot.xy(xy.coords(x, y), type = type, ...) :
  plot type '↦' will be truncated to first character

-- 
David.
> 
> 
> On 12/12/2014 03:38, Marius Hofert wrote:
>> Hi,
>> 
>> Is there a plotmath symbol like LaTeX's \mapsto?
>> I need this comparably often, for example if you want to plot a
>> two-place function in one variable (and thus would like to have
>> ylab="t \mapsto f(t,s)", for example). If there is such a symbol, I'd
>> be great to have it as an example on ?plotmath.
>> 
>> Thanks & cheers,
>> 
>> Marius
> 
> 
> -- 
> Brian D. Ripley,                  rip...@stats.ox.ac.uk
> Emeritus Professor of Applied Statistics, University of Oxford
> 1 South Parks Road, Oxford OX1 3TG, UK
> 
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David Winsemius
Alameda, CA, USA

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