Re: [babel] noweb expansion of LaTeX output from R

From: "Thomas S. Dye" <tsd@tsdye.com>
To: Dan Davison <davison@stats.ox.ac.uk>
Cc: emacs-orgmode@gnu.org
Subject: Re: [babel] noweb expansion of LaTeX output from R
Date: Sun, 1 Nov 2009 17:36:18 -1000	[thread overview]
Message-ID: <55F86F16-4D06-4D32-93C6-AD9BD59F9645@tsdye.com> (raw)
In-Reply-To: <87aaz5q0c5.fsf@stats.ox.ac.uk>

On Nov 1, 2009, at 1:42 PM, Dan Davison wrote:

> "Thomas S. Dye" <tsd@tsdye.com> writes:
>
>> On Nov 1, 2009, at 12:24 PM, Dan Davison wrote:
>>
>>> "Thomas S. Dye" <tsd@tsdye.com> writes:
>>>
>>>> Aloha all,
>>>>
>>>> Is it possible to use the noweb syntax to pass LaTeX output from R
>>>> into a latex source block?  I thought this would work, but the  
>>>> noweb
>>>> expansion yields nil.
>>>>
>>>> Please note that this is just a question and not a request for a
>>>> change to org-babel.  In this particular case, the best solution  
>>>> for
>>>> my workflow appears to be sending the table to a file, where I can
>>>> tweak the results more easily and completely than I can using the
>>>> facilities of the xtable package in R.
>>>>
>>>> It does seem like a potentially useful path, though.
>>>>
>>>> The following source and results blocks illustrate the situation,  
>>>> but
>>>> won't run unless you have a whole.adze object in the R session.  If
>>>> need be, I can supply an example that will stand alone.
>>>>
>>>> All the best,
>>>> Tom
>>>>
>>>> #+begin_src latex
>>>> Here is the output of the quantile
>>>> function: <<r-weight-quantile()>>.
>>>> #+end_src
>>>>
>>>> #+srcname: r-weight-quantile
>>>> #+begin_src R :session :noweb :results output
>>>> library(xtable)
>>>> weight <- quantile(whole.adze$weight)
>>>> xtable(as.data.frame(weight))
>>>> #+end_src
>>>
>>> Hi Tom,
>>>
>>> Do you get the behaviour you want if you change that to
>>> ':results output latex'?
>>>
>>> Dan
>>>
>>>
>>
>> Hi Dan,
>>
>> That changes how the table is wrapped in the results block, from #
>> +begin_example to #+BEGIN_LaTeX, but the noweb expansion still yields
>> nil.
>
> Hi Tom,
>
> I'm not sure that I've quite got my head round the various
> latex/babel/tangle/export possibilities that have come up in the  
> recent
> thread! But I feel that this one should have a solution.
>
> So if I do tangle on the following, I get the output below. Is that
> observation relevant to our discussion? What exactly do you mean when
> you say the noweb expansion yields nil? Can you explain the exact  
> steps
> that you're doing?
>
> Dan
>
> -------------------------------------------------------------
> * test R->latex
> #+begin_src latex :tangle td.tex
> Here is the output of the quantile
>  function:
> <<r-weight-quantile()>>.
> #+end_src
>
> #+srcname: r-weight-quantile()
> #+begin_src R :session :noweb :results output latex
> library(xtable)
> xtable(data.frame(cbind(a=1:3,b=4:6)))
> #+end_src
> -------------------------------------------------------------
>
> -----------------------------------------------------------
> %% generated by org-babel-tangle
>
> %% [[git:~/babel/sandbox/r-latex.org::master@{2009-11-01}][block-1]]
> Here is the output of the quantile
>  function:
> % latex table generated in R 2.9.2 by xtable 1.5-5 package
> % Sun Nov  1 18:36:30 2009
> \begin{table}[ht]
> \begin{center}
> \begin{tabular}{rrr}
>  \hline
> & a & b \\
>  \hline
> 1 &   1 &   4 \\
>  2 &   2 &   5 \\
>  3 &   3 &   6 \\
>   \hline
> \end{tabular}
> \end{center}
> \end{table}.
> %% block-1 ends here
> -----------------------------------------------------------
>
>>
>> Tom
>>
>>>>
>>>> #+resname: r-weight-quantile
>>>> #+begin_example
>>>> % latex table generated in R 2.9.2 by xtable 1.5-5 package
>>>> % Sun Nov  1 11:17:44 2009
>>>> \begin{table}[ht]
>>>> \begin{center}
>>>> \begin{tabular}{rr}
>>>> \hline
>>>> & weight \\
>>>> \hline
>>>> 0\% &   0 \\
>>>> 25\% &  22 \\
>>>> 50\% &  34 \\
>>>> 75\% &  83 \\
>>>> 100\% & 2580 \\
>>>>  \hline
>>>> \end{tabular}
>>>> \end{center}
>>>> \end{table}
>>>> #+end_example
>>>>
>>>>
>>>>
>>>>
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Hi Dan,

This org file reproduces the results I'm seeing.

* test R->latex

#+begin_src latex :tangle td2.tex
Here is the inner block:
<<inner-block>>
#+end_src

#+srcname: inner-block
#+begin_src latex
Here is the output of the quantile
  function:
<<r-weight-quantile()>>.
#+end_src

#+srcname: r-weight-quantile
#+begin_src R :session :noweb :results output latex
library(xtable)
xtable(data.frame(cbind(a=1:3,b=4:6)))
#+end_src

% generated by org-babel-tangle

% [[file:~/Public/projects/903_adzes/org-babel/test-noweb.org::*test 
%20R%20latex][block-1]]
Here is the inner block:

Here is the output of the quantile
  function:
nil.
% block-1 ends here

Tom