Univariate Density Estimation by Orthogonal Series
基于正交级数的单变量密度估计AI 解读 ↓
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基于正交级数的单变量密度估计AI 解读 ↓
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Orthogonal series estimators of univariate densities are proposed that are derived from and motivated by kernel estimators optimal in Whittle's (1958) sense. A preliminary fit of the data from within a one or two parameter class of densities plays the role of a prior mean density. The ratio of the true density and the prior mean density is assumed to have a series expansion in terms of functions orthogonal with respect to the prior mean density. Coefficients of terms of the series are given a joint prior distribution according to which they are independent, with zero means.