[Rd] (PR#13287) Line breaks in mathematical formulae in Rd files
Prof Brian Ripley
ripley at stats.ox.ac.uk
Fri Nov 14 17:29:52 CET 2008
I think the 'problem' is a lack of attention to the manual.
deqn gives “displayed equations” (as in LaTeX's displaymath environment,
or TeX's $$...$$).
seems pretty clear to me, and I hope to any LaTeX user.
On Fri, 14 Nov 2008, xieyihui at gmail.com wrote:
> Hi,
>
> This is a problem about writing R documentation (R-exts 2.6). The
> command "\deqn" defined in "Rd.sty" is:
>
> \newcommand{\deqn}[2]{\[#1\]}
>
> which will put mathematical formulae in the "displaymath" environment;
Well, surprise, surprise it does what it is documented to do!
> that means line breaks are not allowed (or will not be shown) in
> formulae, but sometimes we do need multiple lines of formulae. One
> solution is to write several equations using "\deqn", but I think to
> change the definition of "\deqn" is better:
>
> \newcommand{\deqn}[2]{\begin{eqnarray*}#1\end{eqnarray*}}
That will change the spacing.
> This will not change the pdfLaTeX output effect, moreover, line breaks
> and alignments using "&" will be available in math formulae.
Not to the non-latex conversions.
> Regards,
> Yihui
> --
> Yihui Xie <xieyihui at gmail.com>
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--
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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