Since April 2018 'utf8' is the default input encoding in LaTeX, see http://anorien.csc.warwick.ac.uk/mirrors/CTAN/macros/latex/doc/ltnews.pdf and they added some symbols in December.
Georgi Boshnakov -----Original Message----- From: R-package-devel [mailto:r-package-devel-boun...@r-project.org] On Behalf Of Martin Maechler Sent: 18 June 2019 15:01 To: serguei.so...@gmail.com; Hugh Parsonage Cc: r-package-devel@r-project.org Subject: Re: [R-pkg-devel] .Rd, LaTeX and Unicode >>>>> Hugh Parsonage >>>>> on Tue, 18 Jun 2019 20:03:41 +1000 writes: > utf8x is deprecated > https://tex.stackexchange.com/questions/13067/utf8x-vs-utf8-inputenc#13070 Hmm... interestingly, I've tried quite a few versions of the above which started in 2011, but had been updated in April 2016 : https://tex.stackexchange.com/a/203804/7228 from where it seems that \usepackage[T1]{fontenc} \usepackage[utf8]{inputenc} should be sufficient. Further, note that from https://tex.stackexchange.com/a/238135/7228 the {ucs} package should no longer be needed since ca. 2013, hence your \usepackage[mathletters]{ucs} would not be needed either. HOWEVER: After losing at least half an hour now, trying many variants I found that the only version that works correctly for me (with a teTeX / TeXlive version of 2018) is the version Serguei Sokol proposes (below), including the use of the 'utf8x' option *and* the 'ucs' package ... which is pretty surprising after having read the tex.statexchange threads ... > On Tue, 18 Jun 2019 at 7:52 pm, Serguei Sokol <serguei.so...@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)." That whole document has been very important and crucial, written by Prof Brian Ripley who had worked a *LOT* to bring unicode to R, -- but it has been written 2004-2005 and indeed, I think it is probably fair to say that the above sentence no longer applies to current LaTeX engines (including "simple" pdflatex)... though really, I'm not the expert here, but I think it's a good point in time to reconsider how much UTF8 should be allowed/supported in *.Rd files. One problem: This is (slightly) the wrong mailing list; this would have been a perfect topic for 'R-devel' (discussing about new features etc for R) instead.... ( but we'd rather keep it here for now.) Martin Maechler ETH Zurich and R Core Team >> 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. ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
