Re: Process diagrams with dot and some glue using Org-mode

[Rick Frankel <rick@rickster.com>]

On 2013-06-26 11:23, Karl Voit wrote:
> Hi!
> 
> I would like to define my diagram with the following two tables: one
> for the node definitions and one for the interconnections between
> notes. The syntax should be pretty self-explanatory (or at least I
> hope so):
> I (not an ELISP hacker) would have to use Python and write a table
> parsing class which will get too complicated for my taste :-(
> However, my guess is that this could be implemented in ELISP with
> much less effort.
> 

Two things:

	1. You don't need to write table parsing code, as passing in a
	   table as an argument to a code block will convert it to an
	   array. For example:

	   #+name: ptable
| head1 | head2 |
|-------+-------|
| a     |     1 |
| b     |     2 |

	   #+BEGIN_SRC python :var t=ptable :results value
	     return t
	   #+END_SRC

	   #+RESULTS:
| a | 1 |
| b | 2 |

	   and the python code generated (view w/
	   `org-babel-expand-src-block'):

		   t=[["a", 1], ["b", 2]]
		   return t

	2. You can also use the pydot or pygraphviz libraries for
	   generating the graph directly from python instead of generating
	   dot code.

rick