Re: [igraph] Tracking vertex IDs

[Tamas Nepusz]

Hi Natalia,

> I need to use igraph to recreate a computer network topology and
> calculate the shortest paths. Stations can switch on and off and so
> need to be excluded from the shortest path calculation. The vertex IDs
> are shifted when a vertex is deleted, but I would still need to know
> the computer they actually correspond to. Which would be the  
> simplest way to do this?
Use vertex attributes; e.g., you can set up a "name" attribute for  
each vertex which contains the original IP address of that computer.  
Attributes are preserved upon deletion or insertion, all you have to  
remember is to re-create the name attributes when re-adding an already  
deleted vertex to the network.

--
Tamas