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Geodesic distance counts #64

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smjenness opened this issue Aug 20, 2018 · 3 comments
Open

Geodesic distance counts #64

smjenness opened this issue Aug 20, 2018 · 3 comments

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@smjenness
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screen shot 2018-08-20 at 3 45 36 pm

Geodesic distance distribution count exceeds total possible dyad counts (e.g., for faux.mesa.high: choose(205, 2) = 20910)

@martinamorris
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martinamorris commented Aug 21, 2018

This may be how SNA calculates geodesics. From ?geodist:

geodist (without loss of generality) treats all paths as directed, a fact which should be kept in mind when interpreting geodist output.

This doesn't explicitly say it treats all networks as directed, but it suggests that.

I'll see if I can engage Carter. Calling

@CarterButts

  1. does this mean geodist treats ties in undirected graphs as directed mutuals?
  2. is the result that all geodesics in undirected graphs are counted twice (once for i->j, and once for j->i)
  3. is there a reason this is the preferred behavior for undirected graphs?

@martinamorris
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@CarterButts asking again

@smjenness
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@martinamorris : is this closed?

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