[graph-tool] gt.assortativity vs gt.scalar_assortativity

Hello all, I am trying to use graph-tool to study the assortativity of certain graphs. I find that there are two functions in graph-tool that would do the job: "gt.assortativity" and "gt.scalar_assortativity". I initially thought that if the scalar property that I am interested in is the degree itself, I would get the same value for both. But I don't! I tried calculating assortativity for simple undirected Erdos-Renyi graphs and only "scalar assortativity" seems to give correct answer. In fact, "gt.assortativity" gives me quite high values even for ER graphs. Can somebody kindly explain the problem? Thank you Snehal -- Snehal Madhukar Shekatkar Pune India