[R] geodesic distance

[Simone Gabbriellini]

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  
analysis...

regards,
Simone

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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