[GRASS-dev] [GRASS GIS] #1780: v.net.centrality: betweenness centrality seems wrong

[GRASS GIS]

#1780: v.net.centrality: betweenness centrality seems wrong
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 Reporter:  mlennert                      |       Owner:  grass-dev@…              
     Type:  defect                        |      Status:  new                      
 Priority:  normal                        |   Milestone:  7.0.0                    
Component:  Vector                        |     Version:  svn-trunk                
 Keywords:  v.net.centrality betweenness  |    Platform:  Unspecified              
      Cpu:  Unspecified                   |  
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Comment(by mmetz):

 Replying to [ticket:1780 mlennert]:

 >
 {{{
 v.net streets_wake points=schools_wake thresh=200 out=network op=connect

 v.net.centrality input=network alayer=1 nlayer=2 output=centrality
 cats=1-108 degree=degree closeness=closeness betweenness=betw
 eigenvector=eig
 }}}
 >
 >
 > Only three nodes (36, 136, 138) have betweenness centrality above 0
 which seems wrong.

 I get six nodes (28, 94, 97, 136, 138, 154) with betweenness centrality >
 0. For all other nodes, a betweenness centrality of 0 seems correct
 because they are located at end points of the network, i.e. not in between
 any two other nodes.

 Markus M

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Ticket URL: <http://trac.osgeo.org/grass/ticket/1780#comment:1>
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