Hi, 
I'm new with the graph-tool library.
I was wondering if there is a function for computing the rich-club coefficient? 
The coefficient as a function of the vertex degree (slightly different from the assortativity coeficient).
To be more specific a function that does the same as this function from networkx:
http://networkx.lanl.gov/reference/generated/networkx.algorithms.richclub.rich_club_coefficient.html#networkx.algorithms.richclub.rich_club_coefficient

I think it might be one of these functions:
http://graph-tool.skewed.de/static/doc/correlations.html , but I don't know which one specifically.

Thank you in advance.
Pablo