Antwort: Re: org-babel: feature-request: allow table-cells to be passed as strings - marc-oliver.ihm

From: marc-oliver.ihm@coface.de
To: Eric Schulte <schulte.eric@gmail.com>
Cc: emacs-orgmode@gnu.org, Marc-Oliver Ihm <ihm@online.de>
Subject: Antwort: Re: org-babel: feature-request: allow table-cells to be passed as strings
Date: Thu, 4 Nov 2010 08:23:35 +0100	[thread overview]
Message-ID: <OFABA09D8C.9A1E4284-ONC12577D1.0026F037-C12577D1.00289D5C@coface.de> (raw)
In-Reply-To: <87oca6go8y.fsf@gmail.com>

Hello Eric,

Thanx for coming back on me !

In fact I have found this problem when trying to use calc with babel.
And yes, I agree, using calc for parsing will probably solve this problem.

In fact I am quite excited about the plans for adding calc as a new 
language to babel. It will be a great tool and toy !

with kind regards, Marc-Oliver Ihm

"Eric Schulte" <schulte.eric@gmail.com> 
03.11.2010 21:12

An
Marc-Oliver Ihm <ihm@online.de>
Kopie
emacs-orgmode@gnu.org
Thema
Re: org-babel: feature-request: allow table-cells to be passed as strings

Hi Marc,

Sorry to stall this thread for so long.

Now that I've worked some with Calc it seems that it provides a mature
library of working with large numbers.  My new hope is to convert Babel
to using Calc for all of its numerical string parsing and printing.
That should solve your dilemma in the most natural way.

Does anyone foresee any problems in this potential approach?

Thanks -- Eric

Marc-Oliver Ihm <ihm@online.de> writes:

> Hello,
>
> This would be such an example. The Input table contains some numbers,
> the last of them larger than allowed for an integer.
>
> As the result table show, the last one is converted to float thereby
> using some precision.
>
> I would like to see them all as strings.
>
> with kind regards, Marc-Oliver Ihm
>
>
> #+tblname: numbers
>
> |                           1 |
> |                           2 |
> |                          12 |
> |                          45 |
> |                         166 |
> |                    12567890 |
> | 231231282371983279389999999 |
>
>
> #+begin_src emacs-lisp :var numbers=numbers
> (mapcar
>  (lambda (line)
>      (let ((number (car line)))
>        (list number (type-of number))
>        )
>      )
>    numbers)
> #+end_src
>
> #+results:
> |                      1 | integer |
> |                      2 | integer |
> |                     12 | integer |
> |                     45 | integer |
> |                    166 | integer |
> |               12567890 | integer |
> | 2.3123128237198328e+26 | float   |
>
>
>
>
> Am 04.10.2010 15:30, schrieb Eric Schulte:
>> Hi,
>>
>> Could you send an example of the contents of such a cell, and what it 
is
>> converted to?  Maybe it will be possible to improve the parsing of
>> numerals in Babel s.t. we don't lose precision in these cases.
>>
>> Thanks -- Eric
>>
>> Marc-Oliver Ihm <ihm@online.de> writes:
>>
>>> Hello !
>>>
>>> Currently org-babel, when passing a table as input to a
>>> source-code-block, behaves like this:
>>> If the cell looks like a number, it will be converted to an integer or 
a
>>> float. Otherwise the cell-content is passed unconverted as a string.
>>>
>>> Now, dealing with very large numbers (which I want to process with
>>> calc), I found this behavior annoying, because babel converts my large
>>> numbers to float, loosing precision in the process.
>>>
>>> Now my request would be, to have a switch (maybe as a header argument)
>>> which would tell babel to pass all cells as unconverted strings.
>>>
>>> I have checked the documentation and the sources and have not been 
able
>>> to find such a switch.
>>>
>>>
>>> with kind regards, Marc-Oliver Ihm
>>>
>>>
>>> _______________________________________________
>>> Emacs-orgmode mailing list
>>> Please use `Reply All' to send replies to the list.
>>> Emacs-orgmode@gnu.org
>>> http://lists.gnu.org/mailman/listinfo/emacs-orgmode
>>
>> _______________________________________________
>> Emacs-orgmode mailing list
>> Please use `Reply All' to send replies to the list.
>> Emacs-orgmode@gnu.org
>> http://lists.gnu.org/mailman/listinfo/emacs-orgmode
>>

Namensgeber des neuen Mainzer Fussballstadions 
Aktuelle Infos zur Coface Arena: www.coface-arena.de

Naming right sponsor of the new Mainzer football stadium 
Latest news on the Coface Arena: www.coface-arena.de