[Lemon-user] remark on graphwriter

[Tapolcai János]

Hi,

you were right, the problem was something very different:

I had an undirected graph and saved with DigraphWriter, next I loaded as GraphReader, and every edge became duplicated.

To avoided such a mistake, it might be a good idea to implement: 
(1) the GraphReader writing a warning message, when it reads the label "@arcs",
(2) a new Reading Rule for GraphReader named simpleGraph(), which filters the duplicated edges when parsing the lgf file.

Thanks
János

 

> -----Original Message-----
> From: Alpár Jüttner [mailto:alpar.juttner at gmail.com] On Behalf Of Alpár
> Jüttner
> Sent: Thursday, January 06, 2011 12:24 PM
> To: Tapolcai János
> Cc: lemon-user at lemon.cs.elte.hu
> Subject: Re: [Lemon-user] remark on graphwriter
> 
> Hi,
> 
> The output below is indeed strange.
> Could you please send the exact code producing this output?
> 
> On Thu, 2011-01-06 at 08:57 +0100, Tapolcai János wrote:
> > Hi All,
> >
> > I have a remark related to the lemon lgf undirected graph writer. When I
> print a graph, each Edge is printed in two lines (in both direction), and
> in the reverse direction some strange (default?) values are printed for the
> Edgemaps.
> >
> > The result looks very confusing (the default value for the map was 0),
> e.g.:
> >
> > @edges
> > 		label	cost
> > 0	4	0	1
> > 4	0	1	0
> > 0	2	2	1
> > 2	0	3	10
> > 0	5	4	0
> > 5	0	5	10
> > 1	3	6	10
> > 3	1	7	0
> > 1	4	8	1
> > 4	1	9	0
> > 1	6	10	10
> > 6	1	11	0
> > 2	5	12	0
> > 5	2	13	10
> > 3	4	14	10
> > 4	3	15	0
> > 4	6	16	0
> > 6	4	17	1
> >
> > I know lgf was not designed for human reading, however to avoid any
> confusion I suggest  printing the same value of Edgemaps in both directions,
> or printing each edge in a single line.
> >
> > Thanks
> > János
> > _______________________________________________
> > Lemon-user mailing list
> > Lemon-user at lemon.cs.elte.hu
> > http://lemon.cs.elte.hu/mailman/listinfo/lemon-user
>