hi group How 'functional complimentarity' of a bipartite network can be calculated using the package 'bipartite' -- Pushan Chakraborty CSIR - SRF Center for Pollination Studies, University of Calcutta 35, Ballyguanje Circular Road, Kolkata - 700019 & Wildlife Institute of India Chandrabani, Dehradun - 248001 webpage: http://cpscu.in/?page_id=51 Skype: cpushan [[alternative HTML version deleted]]