[Lemon-user] A quick question

[Alpár Jüttner]

On Mon, 2011-01-10 at 16:07 -0600, Yongjia Song wrote:
> Hi, all,
> 
> I am a new user of lemon. I find it a little inconvenient when using
> lemon in this situation. Suppose I would like to run a maxflow from s
> to t, and the graph is constructed beforehand.
> 
> Now I could not figure out a way to specify node s and node t
> efficiently, (Naturally, we can just specify nodes by their index, but
> it does not seem to have such kind of index in lemon) 
> 
> unless I specify them in the first place or write the nodes in a .lgf
> file.


> So is there an efficient way to specify nodes in the graph? 

There is an @attribute section for this purpose in the .lgf format, see
http://lemon.cs.elte.hu/pub/doc/1.2.1/a00002.html

You can specify the nodes there, then read them with the node() named
parameter of DigraphReader, see the example code at:
http://lemon.cs.elte.hu/pub/doc/1.2.1/a00108.html

Regards,
Alpar