[R-sig-ME] Hamiltonian Monte Carlo and Reimann manifold Langevin Monte Carlo and Mixed Effects

[dave fournier]

I implemented hybrid mcmc (Hamiltonian) in AD Model Builder's random 
effects module.
So far as I know it has not been used much.  It should be possible to 
access it for testing from
Ben Bolker's glmmadmb package for R without too much trouble.