Re: [igraph] <DKIM> Re: Retrieving edges weight

[elastica]

I get it now, thanks Tamas !


----- Mail original ----- 
De: "Tamas Nepusz" <address@hidden> 
À: "Help for igraph users" <address@hidden> 
Envoyé: Samedi 24 Novembre 2018 16:21:06 
Objet: <DKIM> Re: [igraph] Retrieving edges weight 

> but now I cannot retrieve edges weight from the tree. More generally, how do 
> I get an edge attribute from a given graph ? I was expecting Graph interface 
> to have an edges attribute. 
> I only have a list of edges (given by a get_edgelist() method above and this 
> returns tuple, not an edge object). 
Internally, the edges are identified by integers from 0 to M-1, where 
M is the number of edges. If you only have the two endpoints of an 
edge, you need to use get_eid() to get the numeric ID, then you can 
use that to index into g.es["weight"]: 

>>> edge_indices = [g.get_eid(*pair) for pair in tree.get_edgelist()] 
>>> print(g.es[edge_indices]["weight"]) 
[1, 1, 2, 3, 2] 

T. 

_______________________________________________ 
igraph-help mailing list 
address@hidden 
https://lists.nongnu.org/mailman/listinfo/igraph-help