Hi Christopher, the default behavior of add_edge is to create the missing vertices. If you specify a number instead of a vertex object, i.e. 10, all the missing vertices up to id 10 will be created. So, either you create all the vertices up to the maximum long N in your file, using add_vertex(N) as initialization (I used this solution for a recent project with millions of vertices), or you should map your longs to a normalized interval (in case you have sparse ids) and then use a PropertyMap to store their original value. Best, Giuseppe Il giorno mar 6 ott 2015 alle ore 15:43 Christopher Morris < christopher.morris@tu-dortmund.de> ha scritto:

Hi,

I have a huge graph saved in a text file as an edge list. i.e., "node_id_v, node_id_w". As the node IDs are very large I have to use "long()" to convert "node_id_v" to a number. Therefore, I run in trouble when passing those longs to "add_edge()".

Is there a workaround?

Best, Chris _______________________________________________ graph-tool mailing list graph-tool@skewed.de http://lists.skewed.de/mailman/listinfo/graph-tool