Hi, I'm trying to compute Newman's assortativity coefficient with graph-tool, but I'm getting unexpected high values of r. Here's a test: graph-tool --correlated-configurational-model="N=20000,inv_pjk_ceil=\"(inv_poisson(p,5) ,inv_poisson(r,5))\",progress" \ --save graph.xml graph-tool --load graph.xml --assortativity-coefficient="total-degree" this is what I get: assortativity coefficient (total-degree) 0.2105496706333980228 0.0036187517305024605174 The assortativity value above should be very close to zero as the network is uncorrelated, but it's reasonably large. Also, when I try: graph-tool --load graph.xml --scalar-assortativity-coefficient="total-degree" graph-tool crashes: Traceback (most recent call last): File "/usr/bin/graph-tool", line 494, in <module> _main() File "/usr/bin/graph-tool", line 470, in _main run(parsed_options) File "/usr/bin/graph-tool", line 356, in run output_file = opt[0].output_file AttributeError: OptionMask instance has no attribute 'output_file' I'm running graph-tool 1.2.0devel (commit 8b98b8c6, Sun Jul 20 11:46:39 2008 +0200) Am I missing something obvious? many thanks, Rui