Come analyze HEASARC, IRSA, and MAST data in the cloud! The Fornax Initiative is now welcoming all interested beta users.
Metropolis–Hastings.
Two proposal commands are issued so that the Hessian-based proposal wins when accepted, with the deltas form as a fallback in case the Hessian is degenerate (rare for a 3–D well-constrained problem).
chain proposal gaussian deltas 0.5 chain proposal gaussian fit chain type mh chain length 10000 chain burn 1000 parallel walkers 4 chain run mh.fits
Observed: 45.6% acceptance, 4 walkers each producing 2500 post-burn samples, total elapsed time 58 s.