Beware greedy algorithms.

To fairly compare the nestedness of ecological networks, a network's observed nestedness can be divided by its maximum nestedness. The authors show that a greedy algorithm does not find networks' maximum nestedness values. Simulated annealing achieved much better results, laying the foundation for future development of even more sophisticated algorithms.
(© 2019 The Authors. Journal of Animal Ecology published by John Wiley & Sons Ltd on behalf of British Ecological Society.)