From: Thorsten Jolitz <tjolitz@gmail.com>
To: emacs-orgmode@gnu.org
Subject: Re: Computations on properties
Date: Wed, 09 Oct 2013 19:12:49 +0200 [thread overview]
Message-ID: <87bo2ymkq6.fsf@gmail.com> (raw)
In-Reply-To: 87k3hmsbsw.fsf@ericabrahamsen.net
Eric Abrahamsen <eric@ericabrahamsen.net> writes:
> Thierry Pellé <thierry.pelle@soliavos.fr> writes:
>
>> Hi,
>> I'm seeking how to do something like that
>>
>> Let the following text inserted in an org-mode file
>>
>> * Mean Calculation
>> :PROPERTIES:
>> :VAL1: 5
>> :VAL2: 10
>> :COEF: 10
>> :END:
>>
>> I would like to append the result of a computation
>> like RES=(VAL1*COEF+VAL2)/(COEF+1)
>>
>> Something like
>> * Mean Calculation
>> ...
>> :END:
>>
>> Mean Calculation=RES (where RES is the value of the result)
>>
>> I think to do this with a python script but is there a more org-mode/emacs
>> method to do it?
>
> Sometimes I think it would be nice to have a way to draw property values
> directly into a babel block, the way you can with table data. Sort of
> like:
>
> * Heading
> :PROPERTIES:
> :ID: 3f78f08a-ccca-4fc0-aba9-2a192f7a0e5a
> :foo: 5
> :bar: puppy
> :END:
>
> #+BEGIN_SRC emacs-lisp :var alist=3f78f08a-ccca-4fc0-aba9-2a192f7a0e5a
>
> And in the block, the "alist" variable would look like '(:foo 5 :bar
> "puppy").
>
> What would be even better would be to run a tags search on matching
> headlines and feed all property drawers into a single block, as a list
> of alists. Just thinking out loud...
This is probably not really what you want, but at least somehow related. I
would not know how to do this via source-block arguments, but maybe you can
use the results of one source-block (that produces the data) as input for
another source-block that does the real work.
* Heading 1 :match:
:PROPERTIES:
:ID: 3f78f08a-ccca-4fc0-aba9-2a192f7a0e5a
:foo: 5
:bar: puppy
:END:
* Heading 2
:PROPERTIES:
:ID: 3f78f08a-ccca-4fc0-aba9-2a192f7a0e5b
:foo: 6
:bar: yuppy
:END:
* Heading 3 :match:
:PROPERTIES:
:ID: 3f78f08a-ccca-4fc0-aba9-2a192f7a0e5c
:foo: 7
:bar: hippie
:END:
#+begin_src emacs-lisp :results raw
(let ((lst))
(org-map-entries
(lambda () (cons (org-entry-properties) lst))
"match" 'file))
#+end_src
#+results:
((((FILE . /home/tj/News/drafts/drafts/419) (TAGS . :match:) (ALLTAGS
. :match:) (BLOCKED . ) (ID . 3f78f08a-ccca-4fc0-aba9-2a192f7a0e5a) (foo . 5)
(bar . puppy) (CATEGORY . 419))) (((FILE . /home/tj/News/drafts/drafts/419)
(TAGS . :match:) (ALLTAGS . :match:) (BLOCKED . ) (ID .
3f78f08a-ccca-4fc0-aba9-2a192f7a0e5c) (foo . 7) (bar . hippie) (CATEGORY .
419))))
--
cheers,
Thorsten
next prev parent reply other threads:[~2013-10-09 17:13 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-09 12:19 Computations on properties Thierry Pellé
2013-10-09 12:50 ` Thorsten Jolitz
2013-10-09 13:32 ` Thierry Pellé
2013-10-09 15:29 ` Eric Abrahamsen
2013-10-09 17:12 ` Thorsten Jolitz [this message]
2013-10-09 18:21 ` Eric Abrahamsen
2013-10-09 18:23 ` Eric Schulte
2013-10-10 4:52 ` Eric Abrahamsen
2013-10-09 19:27 ` Michael Brand
2013-10-10 6:39 ` Thierry Pellé
2013-10-10 9:04 ` Michael Brand
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