Re: :session question

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

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
>>>
>>>>
>>
>> Hi,
>>
>> this looks very confusing for me.
>>
>> So, what is the purpose of a named session?
>> Understood it being a name-space, whose values don't affect the other ones.
>> What's in python-mode a dedicated shell.
>
> I can't speak for python, but in R, every differently named session will
> run within its own R process.
>
> The cool thing is, that I can work on file_foo.org and file_bar.org
> simultaneously, when file_foo.org uses R-session *foo* and file_bar.org
> uses R-session *bar*.
>
> [...]
>
> Regards,
> Andreas
>
>
>
>


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?

Best,

Andreas