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From: "Eric Schulte" <schulte.eric@gmail.com>
To: "Thomas S. Dye" <tsd@tsdye.com>
Cc: emacs-orgmode@gnu.org
Subject: Re: [babel] :session
Date: Mon, 19 Oct 2009 07:59:49 -0600	[thread overview]
Message-ID: <m2vdibwkkq.fsf@gmail.com> (raw)
In-Reply-To: <BB79121C-3E68-4F27-BBBB-4A203856D5A0@tsdye.com> (Thomas S. Dye's message of "Sun, 18 Oct 2009 18:10:05 -1000")

Hi Tom,

"Thomas S. Dye" <tsd@tsdye.com> writes:

> Aloha all,
>
> In org-babel.org one of the R examples uses a header argument :session that is not otherwise documented.
> 

What a glaring omission, we will have to add this to the documentation.
Thanks for pointing this out.

> I don't trust my Lisp understanding enough to learn about it from the
> source code.  Would it be possible to add it to the documentation?
>

In the mean time, a quick overview of the session argument is that it
allows the execution of source-code blocks to take place in a persistent
"session".  So in R rather than evaluating the block using the R command
line, an *R* buffer will be created and evaluation will take place in
that buffer.  This allows the persistence of environment between
different source-code blocks.  So it would be possible to create a
variable in one source-code block, and reference it in another if both
blocks have the same session header argument.  Adding a string after
:session will name that session, while just the session header will use
the default session -- i.e. *R* for r code, or *ruby* for ruby, etc...

Best -- Eric

>
> org-babel is lots of fun--many, many possibilities ...
>
> Tom
>
> Thomas S. Dye, Ph.D.
>
> T. S. Dye & Colleagues, Archaeologists, Inc.
>
> Phone: (808) 529-0866 Fax: (808) 529-0884
>
> http://www.tsdye.com
>
> _______________________________________________
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      reply	other threads:[~2009-10-19 14:00 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-10-19  4:10 [babel] :session Thomas S. Dye
2009-10-19 13:59 ` Eric Schulte [this message]

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