From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Eric Schulte" <schulte.eric@gmail.com>
Subject: Re: Embedded code
Date: Tue, 18 Jan 2011 09:16:04 -0700
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To: Rainer M Krug <r.m.krug@gmail.com>
Cc: Ido Magal <ido@idomagal.com>, emacs-orgmode@gnu.org

Rainer M Krug <r.m.krug@gmail.com> writes:

> On 01/18/2011 12:48 AM, Eric Schulte wrote:
>> Hi,
>> 
>> This is possible using Babel, the attached org-mode file will execute
>> its code block every time it is opened.  You can replace the contents of
>> the code block with any arbitrary elisp you would like to have executed
>> in the file.
>> 
>> To see this work, save the attached org-mode file to your system, open
>> the file, answer "y" to allow execution, and then check your messages
>> buffer for the "I have been run" message to see that the code block has
>> in fact been evaluated.
>
> This is indeed very useful (e.g. if I open an R script, to open an R
> session and source the file).
>
> But it seems that all code blocks are evaluated on loading. Is there a
> way of only executing a specific code block?
>

Yes, replace the 

# -*- eval: (org-babel-execute-buffer) -*-

with

# -*- eval: (save-excursion (org-babel-goto-named-src-block NAME) (org-babel-execute-src-block)) -*-

where NAME is replaced with the name of the code block to execute.

Cheers -- Eric