[igraph] calculating Evaluation Metric for community detection algorithm

[Fatemeh a]

Hi,

I am not sure if my question well-suited here or not but what I am trying to do is to implement the evaluation metric such as (Conductance,Expansion,Internal density,Cut Ratio,Normalized Cut) using igraph in R,I implement them for an unweighted an undirected graph  but what I am wondering about is to implement these metrics for weighted and directed graph , these are my questions:

• Dose these metric define for the weighted and directed graph in literature, my inquires wasn't so successful?
• As for weighted network, we could easily consider sum of weights instead of number of edges, right? 

Thanks you in advance,

Fatemeh