The Metropolitan-Hastings Algorithm and Extensions

نویسنده

  • S. Sawyer
چکیده

2. The Metropolis-Hastings Algorithm. Metropolis’ idea is to start with a Markov chain Xn on the state space X with a fairly arbitrary Markov transition density q(x, y)dy and then modify it to define a Markov chain X∗ n that has π(x) as a stationary measure. By definition, q(x, y) is a Markov transition density if q(x, y) ≥ 0 and ∫ y∈X q(x, y)dy = 1. If the transformed random walk X ∗ n is irreducible and positive recurrent on X , then

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تاریخ انتشار 2006