On 12/12/2014 19:40, David Winsemius wrote:
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
Hence my careful wording: 'the standard fonts for Quartz-based devices'.
I do not believe 'console font' is a well-defined quantity: perhaps you
meant 'the default font of the R.app console', which many OS X users
never use. For a Terminal and R.app the font can be chosen by the user ....
--
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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