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贝叶斯推断:Metropolis-Hastings 采样 - 简书

 6 years ago
source link: https://www.jianshu.com/p/b8ea9600a30c?
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前面一篇文章贝叶斯统计:初学指南介绍了最简单的 Metropolis 采样方法,本文将介绍另一种采样 Metropolis-Hastings ,并且会对前文介绍的例子给出证明,为什么 Metropolis 采样work。 回顾 我们简单的回顾下前文的内容,我们首先介绍了为什么需要有mcmc,假设有一个贝叶斯公式: 我们为了求得后验分布,需要去计算P(D) 先在参数空间中选择一个 在参数空间中...

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