On Nov 8, 2009, at 9:38 PM, Torsten Wagner wrote:
Hi Tom,
If I try to use the noweb way, I always got error messages which
tells me that
org-babel can not read the result correctly
#+srcname: r-load-libraries
#+begin_src R
library(RMySQL)
library(reshape)
library(xtable)
#+end_src
As I see you do not use any special header here which means results
is set to
value, right? However, there is no special return line to org-babel
either. In
my understanding and according to my error messages library(xtable)
would be
evaluated as the result of this block...
However this results in error messages at least for python.
Which org-babel version due you use (which branch)?
Maybe you or someone else can bring some more light into
this :results topic.
I somehow miss the option :results none to avoid any results which
should be
useful if the source code block is just a piece of a bigger
arrangement. For
literate programming and RR it might be essential to spread blocks
over the
file which will be tangled together (by tangle or a noweb block).
However not
all need provide a result but just need to run in the same session.
Maybe just
the last block of such an arrangement will come up with a result
suitable for
org-babel.
Actually I prefer the idea of :noweb instead of tangle, which seems
to me more
flexible and faster.
Just need to get it running
Thanks
Torsten
Hi Torsten,
It's not clear to me what outcome you desire. Tangling should result
in a source file that can serve as input to a compiler or
interpreter. The combination of :noweb and :session lets you write
literate programs that are sent directly to an interpreter, which
presumably creates some useful output along the way (my example makes
some graphs after a lot of data reshaping), but might be used just to
set up an environment in the interpreter, which then can be
manipulated directly in the session buffer.
I presumed that your reference to makefile meant that you were heading
for the :noweb, :session route. I find this useful because I can
query the state of variables in the session and put the results in a
LaTeX source block. Of course, the same thing would be possible to
insert the results into the org file.
I'm using the version of org-babel that comes with org-mode version
6.32trans. I think I last updated about a week ago. I'm not
competent to work at the bleeding edge. Besides that, I find the org-
babel distributed with org-mode to be mature for such a young piece of
software, and it does pretty much everything I ask it to do.
HTH,
Tom
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