From: Dan Davison <davison@stats.ox.ac.uk>
To: Eric S Fraga <e.fraga@ucl.ac.uk>
Cc: emacs-orgmode@gnu.org, "d.tchin" <d.tchin@voila.fr>
Subject: Re: [BABEL] Output with octave
Date: Sun, 01 Aug 2010 14:18:40 -0400 [thread overview]
Message-ID: <871vai42nz.fsf@stats.ox.ac.uk> (raw)
In-Reply-To: <87iq45x06e.wl%ucecesf@ucl.ac.uk> (Eric S. Fraga's message of "Sat, 24 Jul 2010 00:12:25 +0100")
Eric S Fraga <ucecesf@ucl.ac.uk> writes:
> On Fri, 23 Jul 2010 16:59:43 +0000 (UTC), d.tchin <d.tchin@voila.fr> wrote:
>>
>> Hi
>>
>> I use babel to use with octave language. I use it and
>> define a session so as to have interaction with
>> octave process.
>>
>> It is great to have interaction with octave and
>> check the action of the code easily.
>>
>> I have problem to get output back in org mode file.
>> I try the following code :
>>
>>
>> --8<---------------cut here---------------start------------->8---
>> #+tblname: test
>> | 1 | 2 | 3 |
>>
>> #+source: outtest
>> #+begin_src octave :session *out* :var vec=test :results output
>> vecb=vec;
>> vecb
>> #+end_src
>>
>> --8<---------------cut here---------------end--------------->8---
>>
>> You will get following output
>>
>> #+results: outtest
>> : vec =
>> :
>> : 1 2 3
>> : octave.exe> vecb =
>> :
>> : 1 2 3
>>
>> As you see I get two outputs : vec variable and vecb (with octave prompt).
>> It is what I expected, excepted vec output.
The inclusion of the prompt is undesirable, and that is now on a to-fix
list.
But the ":results value" problems are more serious:
>>
>> With :results value
>>
>> --8<---------------cut here---------------start------------->8---
>> #+tblname: test
>> | 1 | 2 | 3 |
>>
>>
>>
>> #+source: outtest
>> #+begin_src octave :session *out* :var vec=test :results value
>> vecb=vec;
>> vecb
>> #+end_src
>>
>> --8<---------------cut here---------------end--------------->8---
>>
>> I get the following output
>>
>>
>> #+results: outtest
>> : org_babel_eoe
OK, perhaps you or other octave users could advise us on how to proceed
here, as neither Eric Schulte nor I know octave. Note that this works:
#+begin_src octave :session *out* :var vec=test
vecb=vec;
vecb+0
#+end_src
#+results:
: 1.00000000e+00 2.00000000e+00 3.00000000e+00
octave evaluation in org works as follows:
- The user code is evaluated
- The value of the variable 'ans' is written to disk and imported into
org
And the octave manual tells us that 'ans' is:
,----
| The most recently computed result that was not explicitly assigned to a variable
`----
The trouble seems to be that the final expression 'vecb' doesn't count
as a computation, and so doesn't change the value of ans.
So the current workaround is to say "when using octave, you must end
your block with a computation, rather than a simple statement of a
variable name."
Can someone suggest a better solution?
Dan
p.s. Or you could do this
#+begin_src octave :session *out* :var vec=test
vecb=vec;
ans=vecb
#+end_src
#+begin_src octave :session *out* :var vec=test
vecb=vec;
ans=vecb
ans
#+end_src
>>
>> In the octave process, I check that it the last intruction. But
>> what I would expect is to get last instruction vecb.
>>
>> I certainly miss something. Could someone help me on this ?
>
> I don't think you are missing anything obvious as for the ":results
> value" case, I get the same thing. In fact, for ":results output", I
> don't actually get any output! I'm not sure why. I wonder if there
> is a dependence on the version of Octave? I'm using a fairly old
> version (3.0.x instead of 3.2.x).
>
> : Org-mode version 7.01trans (release_7.01g.24.g6b5cf)
> : GNU Emacs 23.2.1 (i486-pc-linux-gnu, GTK+ Version 2.20.0)
> : of 2010-05-16 on raven, modified by Debian
next prev parent reply other threads:[~2010-08-01 18:18 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-23 16:59 [BABEL] Output with octave d.tchin
2010-07-23 23:12 ` Eric S Fraga
2010-07-26 14:25 ` d.tchin
2010-08-01 18:18 ` Dan Davison [this message]
2010-08-01 20:07 ` Re: [BABEL] Output with octave + [PATCH] x2 Juan
2010-08-01 20:22 ` Re: [BABEL] Output with octave [PATCH] Juan Pechiar
2010-08-04 4:18 ` Dan Davison
2010-08-04 15:15 ` d.tchin
2010-08-01 22:19 ` [BABEL] Output with octave + [PATCH] x2 Dan Davison
2010-08-01 22:55 ` [BABEL] Octave issues Juan
2010-08-01 23:32 ` Dan Davison
2010-08-02 9:30 ` [BABEL] Output with octave d.tchin
2010-08-04 4:15 ` Dan Davison
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