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

Serguei Sokol @ergue|@@oko| @end|ng |rom gm@||@com
Tue Jun 18 11:51:05 CEST 2019


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:


     The vorticity ω is defined as $ω = ∇ × u$.

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:

Note "utf8x" and not just "utf8" which is crucial for this example.
With a hope that it would fix unicode errors from LaTeX.


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