Re: [igraph] R : Loop contract.vertices to calculate network measures for groups in a social network in Igraph

[Dimitri Marschall]

Hi Chris,

first thank you very much for your reply. I will try to incorporate your 
suggestion.

The "c()" in "as.numeric" is actually useless, thank you for this hint.

But the transformation of my subv1 to a character is necessary. Igraph 
uses internal vertex ids (I am not sure about the correct term here). 
When importing the edgelist each vertex is given the id of the position 
in the edgelist, so individual 6 gets the id 1, individual 3 gets the id 
2 and so on.
If I only use "as.numeric" then Igraph uses this internal ids, which I 
don´t know prior to the upload. So, I save my subvector (subv1) 
"as.chracter" to adress the vertex with the name given in the edgelist 
and not the Igraph id.
If you want to see the difference plot(g2) with running and without 
running this command you will see the difference.

Kind regards,
D.A.M.