Re: :session question

["Andreas Röhler" <andreas.roehler@easy-emacs.de>]

Am 27.03.2013 13:22, schrieb Rainer M Krug:
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> On 27/03/13 13:18, Andreas Röhler wrote:
>> Am 27.03.2013 12:48, schrieb Nick Dokos:
>>> Andreas Röhler <andreas.roehler@easy-emacs.de> wrote:
>>>
>>>> Am 27.03.2013 10:27, schrieb Andreas Leha:
>>>>> Andreas Röhler <andreas.roehler@easy-emacs.de> writes:
>>>>>
>>>>>> Am 26.03.2013 16:31, schrieb Eric Schulte:
>>>>>>> Achim Gratz <Stromeko@Nexgo.DE> writes:
>>>>>>>
>>>>>>>> Am 26.03.2013 13:37, schrieb Eric Schulte:
>>>>>>>>> This can be done system wide by setting the language-specific header arguments.
>>>>>>>>
>>>>>>>> I've yet to see an example on how to do this.
>>>>>>>>
>>>>>>>
>>>>>>> #+begin_src emacs-lisp (setq org-babel-default-header-args:R '((:session .
>>>>>>> "org-R"))) #+end_src
>>>>>>>
>>>>>>> #+RESULTS: | (:session . org-R) |
>>>>>>>
>>>>>>> #+begin_src R x <- 1 x #+end_src
>>>>>>>
>>>>>>> #+RESULTS: : 1
>>>>>>>
>>>>>>> #+begin_src R x #+end_src
>>>>>>>
>>>>>>> #+RESULTS: : 1
>>>>>>>
>>>>>>>>
>>>>>>
[ ... ]
>>>>
>>>>
>>>> Okay, that's the expected usage. How do you read the example displayed?
>>>>
>>>> Looks like a named (:session . "org-R") affects global R namespace.
>>>>
>>>> What did "org-R" say here, what might be the purpose?
>>>>
>>>> Assume it should switch it on. Then "org-R" represents a boolean here?
>>>>
>>>
>>> "org-R" is the name of the session. The code blocks illustrate that the value of x (set in
>>> the first code block) is preserved and can be used in the second (and subsequent) code
>>> blocks.
>>>
>>> Nick
>>>
>>>
>>
>> Okay, so the :session argument must not be repeated?
>>
>> i.e. doesn't look like a session, resp. not a named session
>>
>>>>>>> #+begin_src R x <- 1 x #+end_src
>>
>>
>> Once a named session "org-R" is started all non-sessioned source goes there? Looks like a
>> broken namespace.
>
> Isn't it the same with all header arguments? when they are set file wide, they are used for the
> source block unless specified otherwise.
>
> Rainer
>

Hmm, may you point me to the file-wide setting?

Form at stake

(setq org-babel-default-header-args:R '((:session . "org-R")))

seems to put all remaining R-evaluations into a named session "org-R"

Don't see any restriction onto a file resp. buffer. Maybe that's thought implicit?

Thanks,

Andreas