From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Charles C. Berry" <ccberry@ucsd.edu>
Subject: Re: [babel] noweb reference with default values
Date: Mon, 14 Dec 2015 08:45:39 -0800
Message-ID: <alpine.OSX.2.20.1512140838350.536@charles-berrys-macbook.local>
References: <olu4mfl6ty2.fsf@med.uni-goettingen.de>
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII; format=flowed
Return-path: <emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org>
Received: from eggs.gnu.org ([2001:4830:134:3::10]:47409)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <ccberry@ucsd.edu>) id 1a8WFx-00056d-I5
	for emacs-orgmode@gnu.org; Mon, 14 Dec 2015 11:45:54 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <ccberry@ucsd.edu>) id 1a8WFs-0008QA-Eo
	for emacs-orgmode@gnu.org; Mon, 14 Dec 2015 11:45:49 -0500
Received: from iport-acv2-out.ucsd.edu ([132.239.0.174]:7521)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <ccberry@ucsd.edu>) id 1a8WFs-0008Po-60
	for emacs-orgmode@gnu.org; Mon, 14 Dec 2015 11:45:44 -0500
In-Reply-To: <olu4mfl6ty2.fsf@med.uni-goettingen.de>
List-Id: "General discussions about Org-mode." <emacs-orgmode.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/emacs-orgmode>,
	<mailto:emacs-orgmode-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/emacs-orgmode>
List-Post: <mailto:emacs-orgmode@gnu.org>
List-Help: <mailto:emacs-orgmode-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/emacs-orgmode>,
	<mailto:emacs-orgmode-request@gnu.org?subject=subscribe>
Errors-To: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org
Sender: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org
To: Andreas Leha <andreas.leha@med.uni-goettingen.de>
Cc: emacs-orgmode@gnu.org

On Mon, 14 Dec 2015, Andreas Leha wrote:

> Hi all,
>
> I'd like to hear your ideas on how to include noweb references to code
> blocks in a way that the default values are used as parameter values.
>
> Here is a little example:
>
> #+PROPERTY: header-args:R :session *testR*
>
> The background is that I like to use Org mode table to record small data.
>
> #+name: datatable
> | A |  B |
> |---+----|
> | 1 | 10 |
> | 2 | 20 |
>
> Usually I want to pre-process and/or convert such data.
>
> #+name: read_datatable
> #+header: :var datatable=datatable
> #+begin_src R :results none
>  datatable$B <- 10 * datatable$B
> #+end_src
>
> Later I would like to use that data in larger (R-) code blocks.  I'd
> like such code blocks to DWIM:
>
> #+name: some_code
> #+begin_src R :noweb yes :results graphics :file testplot.png
>  <<read_datatable>>
>  plot(datatable$A, datatable$B)
> #+end_src
>
> But they do not: They are not stand alone and do not execute -- unless I
> executed `read_datatable' manually/by chance upfront.

Try this:

#+name: read_datatable
#+header: :var datatable=datatable
#+begin_src R :results value :colnames yes
   datatable$B <- 10 * datatable$B
   datatable
#+end_src

#+name: some_code
#+HEADER: :var datatable=read_datatable()
#+begin_src R :noweb yes :results graphics :file testplot.png
plot(datatable$A, datatable$B)
#+end_src


HTH,

Chuck