On 18/06/2019 17:10, Georgi Boshnakov wrote:
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.
Interesting ... but still not sufficient. I have a fairly recent latex
system:
$ latex --version
pdfTeX 3.14159265-2.6-1.40.19 (TeX Live 2018/Mageia)
but unfortunately utf8 alone (and even including
\usepackage[mathletters]{ucs}) cannot compile utf8 math expressions.
I have also tried a full scale test on a tex file obtained with
$ R CMD Rd2pdf --no-clean pkgname
where I replaced
\usepackage[utf8]{inputenc}
by
\usepackage[mathletters]{ucs}
\usepackage[utf8x]{inputenc}
and it did not compile either. In addition, I had to replace every
occurrence of
\inputencoding{utf8}
by
\inputencoding{utf8x}
after what pdflatex worked like a charm.
Serguei.
-----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.
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