Efficient Bayesian Parameter Estimation in Large Discrete Domains
Efficient Bayesian Parameter Estimation in Large Discrete Domains
复制标题
大型离散域中的高效贝叶斯参数估计
DOI:
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发表时间:
1998
期刊:
影响因子:
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通讯作者:
Y. Singer
中科院分区:
文献类型:
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作者:
N. Friedman;Y. Singer
We examine the problem of estimating the parameters of a multinomial distribution over a large number of discrete outcomes, most of which do not appear in the training data. We analyze this problem from a Bayesian perspective and develop a hierarchical prior that incorporates the assumption that the observed outcomes constitute only a small subset of the possible outcomes. We show how to efficiently perform exact inference with this form of hierarchical prior and compare it to standard approaches.