Re: Re: latex export and booktabs tables

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

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One way to deal with this without adding even more complexity to the
core of org-mode could be through the use of "Library of Babel"
functions.

The attached org-mode file provides a function for exporting to the
longtable environment with some example usage.  If this looks generally
useful it (and maybe similar functions) could be added to the library of
babel distributed w/Org-mode.

What do you think? -- Eric


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#+TITLE: longtable
#+OPTIONS: toc:nil

a simple example
#+call: longtable(table=my-table, align="{|r|}") :results latex :exports results

a more complex example which uses =my-first-header= from below
#+call: longtable(table=my-table, align="{|r|}", firsthead=my-firsthead) :results latex :exports results

* COMMENT table hidden in a commented section
#+tblname: my-table
| 1 |
| 2 |
| 3 |
| 4 |

#+results: my-firsthead
#+begin_LaTeX 
  \hline
  \multicolumn{1}{ |c|}{Numbers}\\
  \hline
  \hline
#+end_LaTeX

* COMMENT longtable function
This block can be used to wrap a table in the latex =longtable=
environment, it takes the following arguments -- all but the first two
are optional.
| arg       | description                                                 |
|-----------+-------------------------------------------------------------|
| table     | a reference to the table                                    |
| align     | optional alignment string                                   |
| width     | optional width specification string                         |
| hline     | the string to use as hline separator, defaults to "\\hline" |
| head      | optional "head" string                                      |
| firsthead | optional "firsthead" string                                 |
| foot      | optional "foot" string                                      |
| lastfoot  | optional "lastfoot" string                                  |

#+srcname: longtable
#+begin_src emacs-lisp :var table='((:table)) :var width='() :var align='() :var hline="\\hline" :var firsthead='() :var head='() :var foot='() :var lastfoot='() :noweb yes :results latex
  (org-fill-template
   "
  \\begin{longtable}%width%align
  %firsthead
  %head
  %foot
  %lastfoot
  
  %table
  \\end{longtable}\n"
   (list
    (cons "width"     (if width (format "{%s}" width) ""))
    (cons "align"     (if align (format "{%s}" align) ""))
    (cons "firsthead" (if firsthead (concat firsthead "\n\\endfirsthead\n") ""))
    (cons "head"      (if head (concat head "\n\\endhead\n") ""))
    (cons "foot"      (if foot (concat foot "\n\\endfoot\n") ""))
    (cons "lastfoot"  (if lastfoot (concat lastfoot "\n\\endlastfoot\n") ""))
    (cons "table" (orgtbl-to-generic
                   (mapcar (lambda (lis)
                             (if (listp lis)
                                 (mapcar (lambda (el)
                                           (if (stringp el)
                                               el
                                             (format "%S" el))) lis)
                               lis)) table)
                   (list :lend " \\\\" :sep " & " :hline hline)))))
#+end_src

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Sébastien Vauban <wxhgmqzgwmuf@spammotel.com> writes:

> Hi Erik,
>
> Erik Butz wrote:
>> I found a very old thread on the list about using the booktabs package to
>> have nicer tables in latex export.
>>
>> I found that, making the changes below I can use the booktab package to
>> export tables, and using standard tables only, this seems to work fine.
>>
>> Can anyone advice on whether this kind of change is meaningful or if this is
>> likely to introduce difficulties elsewhere which I did not experience due to
>> the limited scope of usage? It should be said that I did not at all look
>> into longtables so far.
>
> While trying to improve this, I think one could extend it so that the table
> environment can be changed as well, from `tabular' to `array', `tabular*',
> `tabularx' or any other.
>
> There was a discussion on this, a while ago, by Francesco Pizzolante. Have a
> read at: http://www.mail-archive.com/emacs-orgmode@gnu.org/msg18311.html.
>
> Best regards,
>   Seb

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