Overall Metrics Doubt

Jan 3, 2015 at 1:19 AM

I am doing a project for school and I need to do some metrics (in and out-degree, betweenness, closeness and eigenvector).

The thing is, I don't understand the graph that it is plotting me. Why is there 44 units on the X vector? I don't understand why the analysis go from D2 to D45.

Thank you,