From: Juan <Pechiar@computer.org>
Hi,
I'm starting to work with ob-octave and found several problems:
The first, for which I have a fix (see patch below) is that octave's
output was passed on as a string instead of being interpreted as a table:
[diff removed]
Now this works:
8<------------------------------------------------------------
#+source: test_output
#+begin_src octave :results value vector
[[1 2 3];[4 5 6]]
#+end_src
#+results: test_output
| 1.00000000e+00 | 2.00000000e+00 | 3.00000000e+00 |
| 4.00000000e+00 | 5.00000000e+00 | 6.00000000e+00 |
8<------------------------------------------------------------
(before the patch you'd get a single table element with something like
"1 2 3\n 4 5 6\n" inside).
The second problem is that if I use octave table output as input to
another block, it gets interpreted as a string instead of a vector:
8<------------------------------------------------------------
#+results: test_output
| 1.25000000e+00 |
#+source: check_input
#+begin_src octave :var input=test_output() :results output
ischar( input )
size( input )
#+end_src
#+results: check_input
: input = 1.25000000e+00
: ans = 1
: ans =
: 1 14
8<------------------------------------------------------------
This has to do with the EXP notation. The 'e+00' suffix makes the
whole table into a string. The problem is with "%S" in the formatting
inside org-babel-octave-var-to-octave.
The following patch seems to fix it (and makes it possible to work with
complex numbers inside the tables)::
[diff removed]
A third problem is with org-babel-octave-var-to-octave.
For example:
: (org-babel-octave-var-to-octave '( ( 1 2 3 ) ( 4 5 6 ) ))
: -> "[[1, 2, 3], [4, 5, 6]]"
This is not a 2x3 matrix, but a 1x6 vector:
: octave-3.2.3:1> [[1,2,3],[4,5,6]]
: ans =
: 1 2 3 4 5 6
a semicolon ';' or '\n' is needed between rows instead of a comma.
To sum up:
- 2 patches for prepare-session and importing the results back as
org-tables (I don't know if these patches break anything).
- 1 problem with matrix notation in org-babel-octave-var-to-octave.
I'll try to provide a patch for this today.
2010-08-01 Juan Pechiar <Pechiar@computer.org>
* ob-octave.el (org-babel-octave-evaluate-external-process):
use `org-babel-octave-import-elisp-from-file' instead of
`org-babel-eval-read-file'.
(org-babel-octave-var-to-octave): separate matrix rows with
';', and use '%s' as format specifier instead of '%S'
Juan Pechiar