[R-pkg-devel] .Rd, LaTeX and Unicode

[Hugh Parsonage]

utf8x is deprecated

https://tex.stackexchange.com/questions/13067/utf8x-vs-utf8-inputenc#13070



On Tue, 18 Jun 2019 at 7:52 pm, Serguei Sokol <serguei.sokol using gmail.com>
wrote:

> Hi,
>
> I am preparing a package where I would like to use UTF characters in .Rd
> files. When the LaTeX comes to play, I got well known errors e.g.:
> ! Package inputenc Error: Unicode character ∂ (U+2202)
> (inputenc)                not set up for use with LaTeX.
>
> It is coherent with what is said on this page
> https://developer.r-project.org/Encodings_and_R.html :
> "Since LaTeX cannot handle Unicode we would have to convert the encoding
> of latex help files or use Lambda (and tell it they were in UTF-8)."
>
> But LaTeX can support UTF8 as shown with this small example:
>
> \documentclass{article}
> \usepackage[mathletters]{ucs}
> \usepackage[utf8x]{inputenc}
>
> \begin{document}
>      The vorticity ω is defined as $ω = ∇ × u$.
> \end{document}
>
> I can compile it with my LaTeX without problem. May be you too?
> So my suggestion would be to place these two lines somewhere in LaTeX
> header generated by R doc system:
> \usepackage[mathletters]{ucs}
> \usepackage[utf8x]{inputenc}
>
> Note "utf8x" and not just "utf8" which is crucial for this example.
> With a hope that it would fix unicode errors from LaTeX.
>
> Best,
> Serguei.
>
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