[R] geodesic distance

Simone Gabbriellini ogabbrie at tin.it
Tue Aug 8 09:53:12 CEST 2006

I don't know exactly, but you can have a look at the sna package,  
there should be a function for geodesic computation in social network  


Il giorno 03/ago/06, alle ore 11:14, stefano iacus ha scritto:

> Hi,
> has anyone ever seen implemented in R the following "geodesic"
> distance between positive definite pxp matrices A and B?
> d(A,B) = \sum_{i=1}^p (\log \lambda_i)^2
> were \lambda is the solution of det(A -\lambda B)  = 0
> thanks
> stefano
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