On the Estimation of alpha-Divergences
On the Estimation of alpha-Divergences
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关于 alpha 散度的估计
DOI:
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发表时间:
2011
期刊:
影响因子:
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通讯作者:
J. Schneider
中科院分区:
文献类型:
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作者:
B. Póczos;J. Schneider
We propose new nonparametric, consistent Renyi-α and Tsallis-α divergence estimators for continuous distributions. Given two independent and identically distributed samples, a “naive” approach would be to simply estimate the underlying densities and plug the estimated densities into the corresponding formulas. Our proposed estimators, in contrast, avoid density estimation completely, estimating the divergences directly using only simple k-nearest-neighbor statistics. We are nonetheless able to prove that the estimators are consistent under certain conditions. We also describe how to apply these estimators to mutual information and demonstrate their efficiency via numerical experiments.