Re: [igraph] betweenness non-integer values for vertex?

[Szabolcs Horvát]

Dear Thomas,

This mailing list will be shut down soon. Please use
https://igraph.discourse.group/ instead.

What you quote is a good intuitive handle for understanding
betweenness, but if you look at the mathematical definition,

https://en.wikipedia.org/wiki/Betweenness_centrality#Definition

you will see that if there is a pair of vertices between which there
is more than one minimum length path, the betweenness value may not be
integer.

On Fri, 24 Jul 2020 at 11:58, Scherngell Thomas
 wrote:
>
> Dear colleagues,
>
>
>
> I have a network of 130 countries with weighted interactions between them. I 
> am calculating vertex betweenness to rank countries by betweenness, and get 
> back non-integer values for each vertex (both in the weighted and unweighted 
> case). Reading that “The vertex and edge betweenness are (roughly) defined by 
> the number of geodesics (shortest paths) going through a vertex or an edge” I 
> would expect integer values as result, or do I get something wrong?
>
>
>
> Best,
>
> Thomas
>
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[igraph] betweenness non-integer values for vertex?

[Scherngell Thomas]

Dear colleagues,

I have a network of 130 countries with weighted interactions between them. I am 
calculating vertex betweenness to rank countries by betweenness, and get back 
non-integer values for each vertex (both in the weighted and unweighted case). 
Reading that "The vertex and edge betweenness are (roughly) defined by the 
number of geodesics (shortest paths) going through a vertex or an edge" I would 
expect integer values as result, or do I get something wrong?

Best,
Thomas
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