[Lemon-user] GraphCopy : ??

[Kovács Péter]

Hi,

GraphCopy<> is a class for copying graphs. copyGraph() is a function 
that creates an instance of GraphCopy<> and returns it, but does nothing 
more, only if you call member functions of the instance.

To do the copying, you have to call the run() function of the 
GraphCopy<> instance, e.g. lemon::copyGraph(LG,net.NetworkGraph).run().

With GraphCopy<> you can also copy maps easily and you can create node 
and edge reference maps between the objects of the original and the new 
graph.

Peter



Mitcsenkov Attila írta:
> Hi!
> 
> I tried to figure out how to make a duplicate of a (List)Graph object, but now I give it up... :(
> 
> In the documentation I’ve found the GraphCopy class:
> „Class to copy a graph to another graph (duplicate a graph). The simplest way of using it is through the copyGraph()<http://lemon.cs.elte.hu/pub/doc/latest/a00842.html#g44340894daf6f7d9908679cfa989dab1> function.”
> 
> OK. I’ve tried both, because the documentation about it was not so verbose…
> 
> Now this is the code that should work – if I understand the documentation. Possibly not, because it doesn’t work:
> 
>            lemon::copyGraph(LG,net.NetworkGraph);      // 1
>            GraphCopy<ListGraph,ListGraph> GC(LG,net.NetworkGraph);          // 2
> 
>            for(ListGraph::NodeIt nIt(net.NetworkGraph);nIt != INVALID; ++nIt)
>                       cout << "X" << endl;
>            for(ListGraph::NodeIt nIt(LG);nIt != INVALID; ++nIt)
>                       cout << "Y" << endl;
> 
> I’ve tried lines number  1 and 2 both separately, but none of them was working: the output in any case was multiple X-s, and no Y-s.
> 
> 
> Could you please help me, how to duplicate my graph?
> 
> Thanks:
> Attila
>