[R] mtext unicode failure

[Prof Brian Ripley]

On 18/02/2013 14:15, e-letter wrote:
> Readers,
>
> How to solve this unicode input error please?

On what system, in what locale?  And where is Unicode mentioned?

If you intended a subscript 2, use plotmath. That is not a character in 
the standard Postscript fonts, nor is in the encoding you selected.  We 
don't know what that is since it depends on your locale: see ?postscript.

Or use the cairo_ps device.

>
>> postscript("~/tmp/test.eps",width=100/25.4,height=100/25.4,horizontal=FALSE,onefile=TRUE,paper="special")
>> testx<-seq(1:5)
>> testy<-seq(1:5)
>> plot(testy~testx)
>> mtext('text (O₂)\n more text',side=3,line=1)
> Warning messages:
> 1: In mtext("text (O₂)\n more text", side = 3, line = 1) :
>    conversion failure on 'text (O₂)' in 'mbcsToSbcs': dot substituted for <e2>
> 2: In mtext("text (O₂)\n more text", side = 3, line = 1) :
>    conversion failure on 'text (O₂)' in 'mbcsToSbcs': dot substituted for <82>
> 3: In mtext("text (O₂)\n more text", side = 3, line = 1) :
>    conversion failure on 'text (O₂)' in 'mbcsToSbcs': dot substituted for <82>
> 4: In mtext("text (O₂)\n more text", side = 3, line = 1) :
>    conversion failure on 'text (O₂)' in 'mbcsToSbcs': dot substituted for <e2>
> 5: In mtext("text (O₂)\n more text", side = 3, line = 1) :
>    conversion failure on 'text (O₂)' in 'mbcsToSbcs': dot substituted for <82>
> 6: In mtext("text (O₂)\n more text", side = 3, line = 1) :
>    conversion failure on 'text (O₂)' in 'mbcsToSbcs': dot substituted for <82>
>
> If the command to print to postscript is omitted, a graph is viewed
> successfully, with the title text:
>
> text(O₂)
> more text
>
> Thanks.
>
> --
> r2151
>
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>


-- 
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