[igraph] Kendall's tau of two graph ranking list

[lan gao]

Hi, guys,

      I have 2 different ranking lists of 1000 vertices of a graph.

   Like, L1={1 ,3 ,4, 5 .......}

           L2={ 2, 5, 6, 100....}..

     The numbers in each ordering list are the labels of the vertices. For example, 4 means the 4th vertex in the graph.

 

      Now I need to calculate the kendall's tau correlation foeffienct of these two ranking lists.

 

I uses cov(x, y, method="kendall") . But it did not work. 

Anybody can give  me any idea?  

Thanks a ton.

 

 

Lani