Re[2]: [Numpy-discussion] Rookie problems - Why is C-code much faster?

[Alan G I. <ai...@am...>]

On Tue, 21 Feb 2006, (CET) Mads Ipsen apparently wrote: 
> My system consists of N particles, whose coordinates in 
> the xy-plane is given by the two vectors x and y. I need 
> to calculate the distance between all particle pairs 

Of possible interest?
http://www.cs.umd.edu/~mount/ANN/

Cheers,
Alan Isaac