Re: Re: [babel] apply #+TABLEFM lines during export?

["Eric Schulte" <schulte.eric@gmail.com>]

Austin Frank <austin.frank@gmail.com> writes:

> On Sun, Jul 11 2010, Eric Schulte wrote:
>
>> Under the current setup, I don't know of a way to ensure that the
>> formula will be re-run.  This may be a good place for future
>> (post-feature-freeze) functionality.  There has also been discussion
>> of adding a header argument for "post-processing" code blocks which
>> could accept the output of the evaluated code block as input -- this
>> might be related.
>
> Yes, eager to see where this goes.
>
>> As a work-around, I would suggest the following emacs-lisp code block.
>> Export of this code block will trigger the evaluation of the R code
>> block, and it will then trim the output of said block resulting in the
>> desired table precision.
>>
>> #+begin_src emacs-lisp :var tab=anova-example :colnames yes :cache yes
>>   (mapcar
>>    (lambda (row)
>>      (mapcar
>>       (lambda (cell) (if (numberp cell) (format "%.4f" cell) cell))
>>       row))
>>    tab)
>> #+end_src
>
>
> I tried to customize your approach to apply to the whole buffer.  This
> code seems to do a nice job of changing the appearance of the tables
> within the buffer, but the extra precision is still maintained on
> export.
>

if you want to use my approach above more widely you could name the code
block say #+source:less-precision, then add :exports none to each of
your existing code blocks that output over-precise data, and for each
such block add a call of the following form

#+call: less-precision(tab=overly-precise-R-block) :exports results

which should work, but would litter your file with these call lines.  I
guess this is an instance where a post-processing function specified at
the file/subtree level could potentially be useful.

Cheers -- Eric

>
> #+source: format-table-floats
> #+BEGIN_SRC emacs-lisp :results silent :exports none
> (add-hook 'org-export-preprocess-final-hook
>           (lambda ()
>             (while (re-search-forward
>                     "|?[ ]+\\(-?[0-9]+\\.[0-9]+\\)\\(e-\\)?[ ]+|"
>                     nil t)
>               (progn
>                 (replace-match (concat
>                                 (format "%.4f"
>                                         (string-to-number (match-string 1)))
>                                 " |"))
>                 (org-table-align)))))
> #+END_SRC
>
> Can anyone suggest another approach that would change the precision of
> floats in all tables in the buffer before export?  Perhaps there's a
> different hook I should be using for LaTeX export?
>
> Thanks!
> /au