How to use :prologue with latex

How to use :prologue with latex

[Jeremie Juste]

Hello,

I would like to use :prologue  and epilogue with latex output when using
R. Would it be possible to do something like the following?


#+NAME: test1123
#+BEGIN_SRC R :results output latex :prologue \\begin{table} :epilogue \\end{table} :session *R* :dir tmp :cache no
print(xtable(data.frame(a=rnorm(10),b=letters[1:10])),floating.environment=FALSE)
#+END_SRC



#+RESULTS: test1123
#+BEGIN_EXPORT latex
Error: unexpected input in "\"
% latex table generated in R 3.3.1 by xtable 1.8-2 package
% Mon Apr 24 12:40:21 2017
\begin{FALSE}[ht]
\centering
\begin{tabular}{rrl}
  \hline
 & a & b \\ 
  \hline
1 & -0.79 & a \\ 
  2 & 0.71 & b \\ 
  3 & 0.82 & c \\ 
  4 & 1.04 & d \\ 
  5 & 0.46 & e \\ 
  6 & 1.02 & f \\ 
  7 & 0.89 & g \\ 
  8 & -1.12 & h \\ 
  9 & 0.77 & i \\ 
  10 & 2.08 & j \\ 
   \hline
\end{tabular}
\end{FALSE}
Error: unexpected input in "\"
#+END_EXPORT


Best wishes,

Jeremie

Re: How to use :prologue with latex

[Charles C. Berry]

On Mon, 24 Apr 2017, Jeremie Juste wrote:

>
>
> Hello,
>
> I would like to use :prologue  and epilogue with latex output when using
> R. Would it be possible to do something like the following?
>

[...]
> #+BEGIN_SRC R :results output latex :prologue \\begin{table} :epilogue \\end{table} [...]

[...]


Sure. But you do not need to; see my comment at bottom.  Try this:

#+NAME: test1123
#+HEADER: :prologue cat("\\begin{table}\n")
#+HEADER: :epilogue cat("\\end{table}\n")
#+BEGIN_SRC R :results output latex  :session *R* :dir tmp :cache no
require(xtable)
print(xtable(data.frame(a=rnorm(10),b=letters[1:10])),floating.environment=FALSE)
#+END_SRC

You might be better off using the :post header arg.

Define a src block like this:

#+name: add-table-env
#+BEGIN_SRC emacs-lisp
(format "\\begin{table}\n%s\n\\end{table}\n" *this*)
#+END_SRC

Then use

#+HEADER: :post add-table-env()

in place of the two header lines above.  The advantage is that you can if 
you want do more complicated moidification of the result.

----

AFAIK, LaTeX has no FALSE environment.

I think what you actually wanted was *not* :prologue and :epilogue but 
this R code:

#+begin_src R
print(xtable(data.frame(a=rnorm(10),b=letters[1:10])),floating.environment="table")
#+end_src


HTH,

Chuck

Re: How to use :prologue with latex

[Jérémie Juste]

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Hello,

Many thanks to you,

Best wishes,
Jeremie



On Mon, Apr 24, 2017 at 6:43 PM, Charles C. Berry <ccberry@ucsd.edu> wrote:

> On Mon, 24 Apr 2017, Jeremie Juste wrote:
>
>
>>
>> Hello,
>>
>> I would like to use :prologue  and epilogue with latex output when using
>> R. Would it be possible to do something like the following?
>>
>>
> [...]
>
>> #+BEGIN_SRC R :results output latex :prologue \\begin{table} :epilogue
>> \\end{table} [...]
>>
>
> [...]
>
>
> Sure. But you do not need to; see my comment at bottom.  Try this:
>
> #+NAME: test1123
> #+HEADER: :prologue cat("\\begin{table}\n")
> #+HEADER: :epilogue cat("\\end{table}\n")
> #+BEGIN_SRC R :results output latex  :session *R* :dir tmp :cache no
> require(xtable)
> print(xtable(data.frame(a=rnorm(10),b=letters[1:10])),floati
> ng.environment=FALSE)
> #+END_SRC
>
> You might be better off using the :post header arg.
>
> Define a src block like this:
>
> #+name: add-table-env
> #+BEGIN_SRC emacs-lisp
> (format "\\begin{table}\n%s\n\\end{table}\n" *this*)
> #+END_SRC
>
> Then use
>
> #+HEADER: :post add-table-env()
>
> in place of the two header lines above.  The advantage is that you can if
> you want do more complicated moidification of the result.
>
> ----
>
> AFAIK, LaTeX has no FALSE environment.
>
> I think what you actually wanted was *not* :prologue and :epilogue but
> this R code:
>
> #+begin_src R
> print(xtable(data.frame(a=rnorm(10),b=letters[1:10])),floati
> ng.environment="table")
> #+end_src
>
>
> HTH,
>
> Chuck
>
>
>
>


-- 
Jérémie Juste

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