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From: Daniel Drake <silophophe@gmail.com>
To: "emacs-orgmode@gnu.org" <emacs-orgmode@gnu.org>
Subject: [0][babel][R] Undesired conversion of integers to floats in R code block output
Date: Thu, 16 Feb 2012 11:07:02 -0800	[thread overview]
Message-ID: <4F3D53D6.40407@gmail.com> (raw)

Hi All,

I'm using R in org-mode/babel to analyze data from a psychological
study.  The subjects in this study are identified by nine digit integers
(e.g., 987654321) that I treat as strings (or factors) in my R data

Tables output by an R code block that contain these subject IDs are
not formatted properly: the subject IDs seem to be treated as numbers
and a decimal point and a trailing zero are appended.  For example,
what should be
|   subj.id |
| 987654321 |
|     subj.id |
| 987654321.0 |
(I've included real, self-contained code below.)

When I write the data frames directly to a file from within the R code
block (using a write.table function call that mimics the one in
ob-R.el), the integer IDs are preserved; but when code from ob-R.el
writes them out, the values get reformated as floats.

I've noticed that eight digit integers are not modified in the same
way, which makes me wonder if there is a 'digits' threshold I could
modify to prevent this from happening.

I've pretty much ruled out the possibility that this transformation
occurs in R; however I'm not proficient enough in elisp to follow the
operations that happen after the data frame is written to a file in
the org-babel-R-write-object-command.

Any pointers to help me figure this out would be very appreciated!
(I've seen this thread:
http://comments.gmane.org/gmane.emacs.orgmode/31373, but do not know
if the conversion to calc has been made already or if it is the source
of the problem.)


I'm running:
- Arch Linux (32 bit)
- GNU Emacs 23.4.1
- Org-mode version release_7.8.03-351-g47eb3
- R version 2.14.1 (2011-12-22)

* Test
** table as generated by org-mode/babel
#+name: make
#+begin_src R  :results value  :colnames yes
   temp <- data.frame('A'=c('987654321'),'B'=c('98765432'))
   ## -- this call mimics the one in ob-R.el

#+RESULTS: make
|           A |        B |
| 987654321.0 | 98765432 |

** table as generated by R directly
#+name: read
#+begin_src sh  :results output
   cat test_r.tsv

#+RESULTS: read
: A	B
: 987654321	98765432

             reply	other threads:[~2012-02-16 19:09 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-02-16 19:07 Daniel Drake [this message]
2012-02-18 16:23 ` [0][babel][R] Undesired conversion of integers to floats in R code block output Eric Schulte
2012-02-19  7:02   ` Daniel Drake
2012-02-19 16:48     ` Eric Schulte
2012-02-19 17:40       ` Daniel Drake
2012-02-19 18:28         ` Daniel Drake
2012-02-19 19:27           ` Daniel Drake
2012-02-19 20:46             ` Eric Schulte
2012-02-19 21:19               ` Daniel Drake
2012-02-19 21:35               ` Achim Gratz
2012-02-20 17:36                 ` Achim Gratz

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