Re: :session question

[Andreas Leha <andreas.leha@med.uni-goettingen.de>]

Hi Eric,

Eric Schulte <schulte.eric@gmail.com> writes:

> Andreas Leha <andreas.leha@med.uni-goettingen.de> writes:
>
>> Hi Eric,
>>
>> [...]
>>
>>> As a side note, if
>>> one wants to set these R defaults for a single file the following syntax
>>> at the top of the file will suffice.
>>>
>>>     # -*- org-babel-default-header-args:R: ((:session . "foo")) -*-
>>>
>>
>> That does not work for me.  (I am on GNU Emacs 24.3.50.1, org-mode
>> version 8.0-pre (release_8.0-pre-97-gffdd9e))
>>
>
> That's weird, it works perfectly for me.  I'm using the same version of
> Emacs, but an earlier version of Org-mode.
>
> Org-mode version 7.9.3f (release_7.9.3f-17-g7524ef @ /usr/share/emacs/24.3/lisp/org/)
>
>>
>> When I open an org-file containing that line, I get
>> ,----
>> | Malformed mode-line
>> `----
>> and have to answer
>> ,----
>> | The local variables list contains values that may not be safe(*).
>> | 
>> | (*) org-babel-default-header-args : R:
>> | 
>> | Please type y, n, or !: y
>> `----
>>
>> When I accept and try to actually evaluate R-code, I get 
>> ,----
>> | Wrong type argument: sequencep, R: |
>> `----
>>
>>
>> What am I missing?
>>
>
> I'm not sure.  For some reason Emacs thinks the variable ends at the ":"
> in the variable name.  I'm attaching the complete example file I've used
> locally, please retry with that and see if the problem persists.
>
> # -*- org-babel-default-header-args:R: ((:session . "foo")) -*-
> #+Title: Example
> #+Author: Eric Schulte
>
> For more information on file local variables see [[info:elisp#File%20Local%20Variables][info:elisp#File Local
> Variables]].
>
> Because there is a default :session values assigned locally for R
> blocks we have the following.
>
> #+begin_src R
>   x <- 1
>   x
> #+end_src
>
> #+RESULTS:
> : 1
>
> #+begin_src R
>   x
> #+end_src
>
> #+RESULTS:
> : 1
>
> But non-R code blocks do not have a default session value.
>
> #+begin_src sh
>   date
> #+end_src
>
> #+RESULTS:
> : Wed Mar 27 09:45:47 MDT 2013
>
>

Thanks for your answer!  I tested with your file.  I only get the
'Malformed mode-line'.  (The questions about unsave variables was my
mistake.)

But the session 'foo' is still not started, but the code blocks are
evaluated as if there was no session specified:

#+begin_org
# -*- org-babel-default-header-args:R: ((:session . "foo")) -*-
#+Title: Example
#+Author: Eric Schulte

For more information on file local variables see [[info:elisp#File%20Local%20Variables][info:elisp#File Local
Variables]].

Because there is a default :session values assigned locally for R
blocks we have the following.

#+begin_src R
  x <- 1
  x
#+end_src

#+RESULTS:
: 1

#+begin_src R
  x
#+end_src

#+RESULTS:

But non-R code blocks do not have a default session value.

#+begin_src sh
  date
#+end_src

#+RESULTS:
: Mi 27. Mär 21:18:49 CET 2013
#+end_org


Is that just not working for me?  And any ideas, what I could do about
it?

Regards,
Andreas