[igraph] help needed in calculating graph knn

[poulomi ganguli]

Hi,

I have a weighted undirected network, which is correlation network & some of the weights are negative. When calculating graph knn using foll. command

graph.knn(g1,vids=V(g1),weights=TRUE)

I am getting foll. error :

Error in .Call("R_igraph_avg_nearest_neighbor_degree", graph, vids - 1,  :
  At structural_properties.c:5649 : Invalid weight vector size, Invalid value

Even I am not able to calculate some of the basic graph properties. Any suggestions on this, will be appreciable. Thanks,

- poulomi

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Best Regards,

~ Poulomi

Poulomi Ganguli

Postdoctoral Research Associate,

Northeastern University

Boston, MA-02115