[Haskell-cafe] Looking for n-body example with repa.

[Grigory Sarnitskiy]

Hello!

I'm studying repa package and trying to implement O(N^2) n-body code. I'm using Array DIM2 Double to represent the collection of particles.

I've managed to write a function which calculates the energy of one particle in the field of others but I'm struggling to write a code to calculate the energy of the whole system.

Maybe someone here has already written such code?