I am very sorry to bug you so long, but I am bewildered now. Of course, the degree is a discrete variable. I said we treat it as a continuous variable because we don't categorize the degree values like we do for a gender. For example, we don't treat degree values 25 and 26 as two different categories. (Formula 7.82 in Newman's book).
I am discarding repetitions because I wanted to treat unique degree values as discrete types. For example, to study mixing by genders, I will have first to find out the unique gender values. What is wrong with this? Thank you On Fri, Oct 6, 2017 at 4:21 PM, Tiago de Paula Peixoto <[email protected]> wrote: > On 06.10.2017 07:37, Snehal Shekatkar wrote: > > First, the formula for gt.assortativity implies that we are talking about > > discrete categories for the vertices. If this is true, how can we use it > at > > all for "degree" since we treat that as a continuous variable? Thus, I > > don't understand what does "in", "out" and "total" do in this formula. > > Degrees are discrete, not continuous. > > > Second, I tried implementing the formula itself assuming that the actual > > degree values to be discrete types and my code gives different results > than > > the result given by gt.assortativity. I agree that I might be > interpreting > > the whole thing in a different fashion and I would be very happy to > > understand it. My code: > > > > import numpy as np > > import graph_tool.all as gt > > > > # Load a graph > > g = gt.collection.data['karate'] > > > > # Unique degree values or types > > deg_vals = list(set([v.out_degree() for v in g.vertices()])) > > n = len(deg_vals) > > Why are you doing this? The moment you discard repetitions, all the > fractions you compute will be wrong. > > > Why are these two values different? > > Because they come from different algorithms. > > Best, > Tiago > > -- > Tiago de Paula Peixoto <[email protected]> > > > _______________________________________________ > graph-tool mailing list > [email protected] > https://lists.skewed.de/mailman/listinfo/graph-tool > > -- Snehal M. Shekatkar Pune India
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