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Re: [O] Computations on properties
From: |
Michael Brand |
Subject: |
Re: [O] Computations on properties |
Date: |
Thu, 10 Oct 2013 11:04:35 +0200 |
Hi Thierry
On Thu, Oct 10, 2013 at 8:39 AM, Thierry Pellé
<address@hidden> wrote:
> After some tests :
> ==> the idea of Michael
>> --------------------------------
>> * Mean Calculation
>> :PROPERTIES:
>> :VAL1: 5
>> :VAL2: 10
>> :COEF: 10
>> :END:
>>
>> Mean Calculation = call_mean() =5.454545454545454=
>>
>> * code :noexport:
>> #+NAME: mean
>> #+HEADER: :var val1='nil
>> #+HEADER: :var val2='nil
>> #+HEADER: :var coef='nil
>> #+BEGIN_SRC emacs-lisp :exports none
>> (setq
>> val1 (string-to-number (org-entry-get
>> org-babel-current-src-block-location "VAL1" t))
>> val2 (string-to-number (org-entry-get
>> org-babel-current-src-block-location "VAL2" t))
>> coef (string-to-number (org-entry-get
>> org-babel-current-src-block-location "COEF" t)))
>> (/ (+ (* val1 coef) val2) (+ coef 1.0))
>> #+END_SRC
>> --------------------------------
>
> give an error ( "Symbol's value as variable is void:
> org-babel-current-src-block-location")
This I would expect from an org-version older than 8.1. Check
C-h v org-babel-current-src-block-location
M-x org-version
But if you did not change the version there might be some problem
before the first loading of ob-core.el. If you can reproduce it, maybe
with a fresh started Emacs, I hope that someone more familiar with
autoload etc. than me can help.
> ==> After some tests, it works in changing the "setq" part as
> val1 (or val1 (string-to-number
> (org-entry-get org-babel-current-src-block-location "VAL1" t)
> ))
This does still not deal with all cases. As you seem to dive deeper
please forget my simplified version posted earlier and see
testing/examples/babel.org.
> I can't figure out why...
See the attached patch that adds comments to
testing/examples/babel.org for the two "or" and more.
CCed Eric Schulte who I would like to ask to review and apply the patch.
> ==> I will try with python...
Start from the shell example in testing/examples/babel.org
Did you check if you need the t or nil for org-entry-get?
Michael
0001-Babel-add-comments-to-ERT-for-reading-properties.patch.txt
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