From mboxrd@z Thu Jan  1 00:00:00 1970
From: Daniel Drake <silophophe@gmail.com>
Subject: Re: [0][babel][R] Undesired conversion of integers to floats in R
 code block output
Date: Sun, 19 Feb 2012 13:19:58 -0800
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To: Eric Schulte <eric.schulte@gmx.com>
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On Sun 19 Feb 2012 12:46:15 PM PST, Eric Schulte wrote:
>>
>> A further followup, at the risk of descending into minutia.  The
>> culprit seems to be the emacs function string-to-number.
>>
>> On my 32-bit Arch machine:
>> (string-to-number "123456789"): 123456789 (#o726746425, #x75bcd15)
>> (string-to-number "987654321"): 987654321.0
>> GNU Emacs 23.4.1 (i686-pc-linux-gnu, GTK+ Version 2.24.9) of
>> 2012-02-01 on shirley.hoetzel.info
>>
>> On a 64-bit Ubuntu (11.10) machine:
>> (string-to-number "123456789"): 123456789 (#o726746425, #x75bcd15)
>> (string-to-number "987654321"): 987654321 (#o7267464261, #x3ade68b1)
>> GNU Emacs 23.3.1 (x86_64-pc-linux-gnu, GTK+ Version 2.24.5) of
>> 2011-08-14 on allspice, modified by Debian
>>
>
> Ah, nice debugging!
>
> That must be the issue, as I'm working on a 64-bit machine.
>
> Maybe one workaround could be to prefix the numbers with a letter in
> R-land so that emacs interprets them as strings.
>
> Cheers,
>

Poking around the web I found that emacs guarantees 28 bits as a 
minimum precision.  For a while I did as you suggested, prefixing all 
subjects ids with 'id'.  But it's cleaner if I reinstall a 64-bit 
version of Arch.  From your experiments, I already know its 64-bit 
version of emacs supports at least 30 bits.

Thanks again for your help.
Dan