[OF - statistics] Distance covariance

[Juan Pablo Carbajal]

Hi,

I translated this R code into Octave code. I was wondering if it suits
the statistics package.
http://agora.octave.org/snippet/B63M/

Please check if the attribution to the original authors is correct.
Sources are here
http://cran.us.r-project.org/web/packages/energy/index.html

I will remove the code at the bottom if it is accepted for statistics.

There is also C code, but I for me this already works.

Cheers