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