Re: [O] Centering R babel plots in LaTeX/Beamer export?

[John Hendy]

On Mon, Jul 9, 2012 at 4:26 PM, Nick Dokos <address@hidden> wrote:
> John Hendy <address@hidden> wrote:
>
>> I'm exporting a Beamer presentation with R babel blocks and my plots
>> are not centered. This should be a reproducible example:
>>
>> -----
>> #+startup: beamer
>> #+latex_class: beamer
>> #+options: toc:nil latex:t tex:t
>> #+latex_class_options: [presentation,bigger]
>> #+beamer_frame_level: 1
>>
>> * plot
>>
>> #+header: :width 8 :height 6
>> #+begin_src R :exports results :results output graphics :file file.pdf
>> x <- c(1:10)
>> y <- x^2
>> plot(x,y)
>> #+end_src
>> -----
>>
>> I tried putting #+begin_center and #+end_center around the block, but
>> it changes the LaTeX export to wrapping my R block in
>> \begin/\end{verbatim}.
>>
>> Worg ob-R-doc has a :pagecentre option, but says it defaults to true,
>> so I'm not sure that's my fix.
>>
>
> This is pretty much brute-force, but seems to work:
>
> --8<---------------cut here---------------start------------->8---
> #+startup: beamer
> #+latex_class: beamer
> #+options: toc:nil latex:t tex:t
> #+latex_class_options: [presentation,bigger]
> #+beamer_frame_level: 1
>
> * plot
>
> #+header: :width 8 :height 6
> #+name: foo
> #+begin_src R :exports results :results output graphics :file file.pdf 
> :pagecentre true
> x <- c(1:10)
> y <- x^2
> plot(x,y)
> #+end_src
>
> #+LATEX: \begin{center}
> #+RESULTS: foo
> [[file:file.pdf]]
> #+LATEX: \end{center}
> --8<---------------cut here---------------end--------------->8---
>

I only get a #+results line if I do C-c C-c on the block. I'm
primarily tweaking other stuff and just using C-c C-e p to export to
LaTeX, which produces no #+results section and thus does not allow me
to use a center environment around that bit. I suppose I can manually
add them, but if I re-evaluate babel doesn't recognize it as the
#+results section anymore and I wind up with this after the second
eval:

-----
#+RESULTS: foo
[[file:file.pdf]]

#+LATEX: \begin{center}
#+RESULTS: foo
[[file:file.pdf]]
#+LATEX: \end{center}
-----

I still may consider it as an interim solution. I'm surprised there's
no option to center resultant plots!


John


> Nick
>