R help - Oct 2017 - ggplot2 and tikzDevice : problems with accents

Hi all,

I can't fathom why the accented "?" in the following ggplot2 graph
makes
R hangs when using tikzdevice,? whereas it works using simple pdf device.

######
library(tikzDevice)
library(ggplot2)

options(tikzDefaultEngine = "luatex")


tikzLualatexPackages =c(
 ? "\\usepackage{tikz}\n",
 ? "\\usepackage[active,

tightpage,psfixbb]{preview}\n",
 ? "\\usepackage{fontspec,xunicode}\n",
 ? "\\PreviewEnvironment{pgfpicture}\n",
 ? "\\setlength\\PreviewBorder{0pt}\n"
)


x<- rnorm(10)
y<- rnorm(10)
df <- data.frame(x=x, y=y)

#### This example works
tikz(standAlone = TRUE)
ggplot(df, aes(x=x, y=y))+geom_point() +xlab("e")
dev.off()
####

#### This example hangs and never completes
tikz(standAlone = TRUE)
ggplot(df, aes(x=x, y=y))+geom_point() +xlab("?")
dev.off()
####

#### Working OK when using pdf device
pdf()
ggplot(df, aes(x=x, y=y))+geom_point() +xlab("?")
dev.off()
####

Thanks for your help

Jacques


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On 22 October 2017 at 17:56, Jacques Ropers <jropers at gmail.com>
wrote:
>
> Hi all,
>
> I can't fathom why the accented "?" in the following ggplot2
graph makes
> R hangs when using tikzdevice,  whereas it works using simple pdf device.
>
[...]

I just tried your code and my R doesn't hang but it does give an TeX-error:

(/usr/share/texlive/texmf-dError in getMetricsFromLatex(TeXMetrics, verbose
= verbose) :
TeX was unable to calculate metrics for the following string
or character:

77

Common reasons for failure include:
  * The string contains a character which is special to LaTeX unless
    escaped properly, such as % or $.
  * The string makes use of LaTeX commands provided by a package and
    the tikzDevice was not told to load the package.

Regards
Martin

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