Daniel Drake <silophophe@gmail.com> writes:

> 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
> frames.
>
> 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 |
> becomes
> |     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.)
>

Hi Dan,

When I launch Emacs without any personal configuration (emacs -Q),
evaluate ob-R.el to add R support, and then execute your code blocks I
get the following behavior.