[R] display UTF8 characters in pdf

[Thierry Onkelinx]

Dear all,

Thanks to Ista and Olivier. The solution of Ista works for some characters
but not all. The solution of Olivier works, at least for the characters
that I've tried.

Best regards,

ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and
Forest
team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
Kliniekstraat 25
1070 Anderlecht
Belgium

To call in the statistician after the experiment is done may be no more
than asking him to perform a post-mortem examination: he may be able to say
what the experiment died of. ~ Sir Ronald Aylmer Fisher
The plural of anecdote is not data. ~ Roger Brinner
The combination of some data and an aching desire for an answer does not
ensure that a reasonable answer can be extracted from a given body of data.
~ John Tukey

2017-03-10 21:22 GMT+01:00 Olivier CROUZET <Olivier.Crouzet op univ-nantes.fr>:

> Hi,
>
> AFAICT, you need to use a Cairo device for being able to display some
> Unicode
> characters in a plot.
>
> From my experience, the CairoPDF() from library(Cairo) does not work
> (and I don't understand the difference with cairo_pdf()), but the
> cairo_pdf() from grDevices does work perfectly well for this aim. As far
> as I'm concerned, I use it with both ggplot2 and regular plots and it
> does a perfect job. Here is a short example:
>
> In an R console:
>
> cairo_pdf(filename = "test.pdf")
> plot(1,1,pch = "\u254")
> dev.off()
>
> Also, I use it with knitr and it works great. You just have to declare a
> specific device ("cairo_pdf").
>
> For example, in an RMarkdown document:
>
> ```{r ipaunicode, echo=TRUE, dev='cairo_pdf'}
> plot(1, 1, pch = "\u254")
> ```
>
> and in a LaTeX / knitr document as well:
>
> <<ipaunicode, dev="cairo_pdf">>=
> plot(1, 1, pch = "\u251")
> @
>
> Hope this helps.
>
> Yours.
> Olivier.
>
> On Fri, 10 Mar
>
> 2017 17:06:25 +0100 Thierry Onkelinx <thierry.onkelinx op inbo.be> wrote:
>
> Dear all,
>>
>> I'd like to use some UTF-8 characters in a plot. Some of them are not
>> rendered with saving the plot as pdf. Any suggestions?
>>
>> library(ggplot2)
>> symbols <- c("\U1F697", "\U00A9", "\U24DA", "\U00C1")
>> test <- data.frame(
>>   x = seq_along(symbols) %% ceiling(sqrt(length(symbols))),
>>   y = ceiling(seq_along(symbols) / ceiling(sqrt(length(symbols)))),
>>   symbol = symbols
>> )
>> p <- ggplot(test, aes(x = x, y = y, label = symbol)) + geom_text(size
>> = 10) p
>> ggsave(p, file = "test.png")
>> ggsave(p, file = "test.pdf")
>>
>> The last command gives several similar warnings, all related to the
>> symbols which are not rendered properly:
>>
>> Warning messages:
>> 1: In grid.Call.graphics(L_text, as.graphicsAnnot(x$label),  ... :
>>   conversion failure on '��' in 'mbcsToSbcs': dot substituted for <f0>
>>
>> I'm running R 3.3.2 under Ubuntu 16.04.1 and ggplot2 2.2.1
>>
>> Best regards,
>>
>> Thierry
>>
>>
>> ir. Thierry Onkelinx
>> Instituut voor natuur- en bosonderzoek / Research Institute for
>> Nature and Forest
>> team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
>> Kliniekstraat 25
>> 1070 Anderlecht
>> Belgium
>>
>> To call in the statistician after the experiment is done may be no
>> more than asking him to perform a post-mortem examination: he may be
>> able to say what the experiment died of. ~ Sir Ronald Aylmer Fisher
>> The plural of anecdote is not data. ~ Roger Brinner
>> The combination of some data and an aching desire for an answer does
>> not ensure that a reasonable answer can be extracted from a given
>> body of data. ~ John Tukey
>>
>>         [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help op r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> 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.
>>
>
> --
>   Olivier Crouzet, PhD
>   /Assistant Professor/
>   @LLING - Laboratoire de Linguistique de Nantes
>     UMR6310 CNRS / Université de Nantes
>   /Guest Researcher/
>   @UMCG (University Medical Center Groningen)
>     ENT department
>     Reijksuniversiteit Groningen
>
>
> ______________________________________________
> R-help op r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posti
> ng-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

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