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Re: [Orgmode] Re: From state table to state diagram


From: Rainer M Krug
Subject: Re: [Orgmode] Re: From state table to state diagram
Date: Sat, 25 Sep 2010 09:40:47 +0200

Hi

I really like the idea of this conversion from a State Transition Table to a State Transition Diagram as it is much easier to make a table then a graph. Unfortunately I don't know enough of python to help here. 
Could you please publish your solution here (and on worg) as it would be a very useful addition to org.

Cheers,

Rainer


On Thu, Sep 23, 2010 at 5:02 PM, Gary <address@hidden> wrote:
Sorry, I've been rather lax on this :( I got dragged onto other stuff,
went on training courses, and all sorts of other things.

Eric Schulte wrote:
> Babel does support generating diagrams with graphviz via "dot" code
> blocks.  Babel is also capable of converting Org-mode tables to list
> objects in a number of languages, so I'd recommend writing a table->dot
> script in your favorite language, and then using babel to handle the
> coordination and Org-mode integration.

That's all very easy for you to say :))

> I'm happy to help in this regard, the first step would be something like
> the following example which assumes python is your preferred scripting
> language (as you can see I have no idea what your state table may look
> like)...

Well, wikipedia suggests the following[1] (and goes into further detail
as well[2])
   | Current State -> | State | State | State |
   | Input   v        |   A   |   B   |   C   |
   |------------------+-------+-------+-------|
   | x                |   B   | ...   | ...   |
   | y                | ...   |   C   | ...   |
which basically says that when the machine is in State A and receives
'x' then it transitions to State B, and when it receives a 'y' in State
B it transitions to State C.

> #+results: state-table
> | 1 | 2 |
> | 3 | 4 |
>
> #+source: table-to-dot
> #+begin_src python :var table=state-table
>   python code here

Okay. What should this python code here do? :) I know, it converts a
table to dot-script, but are there any examples I could look at which
take a table as input and output something (anything), just so I can see
how the python code should expect its input?

> #+end_src
>
> #+begin_src dot :var text=table-to-dot(table=state-table)
>   graph{
>     $text
>   }
> #+end_src
>
> Once this is working I think it could make a great addition to the
> library of babel [1] (a collection of generally useful code blocks).

Sure :)

[1] http://en.wikipedia.org/wiki/Finite-state_machine#Concepts_and_vocabulary
[2] http://en.wikipedia.org/wiki/State_transition_table


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