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Fast and accurate computation for kernel estimators

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  • Tang, Qingguo
  • Karunamuni, Rohana J.

Abstract

Standard kernel density and regression estimators are well-known to be computationally very slow when analyzing large data sets, and algorithms that achieve considerable computational savings are highly desirable. With this goal in mind, two fast and accurate computational methods are proposed in this paper for computation of univariate and multivariate local polynomial estimators defined on an equally spaced grid. Compared to direct implementation, the proposed algorithms lead to substantial computational savings. For the case in which the evaluation points are not the grid points, a fast algorithm is also proposed. It is shown that the proposed method is asymptotically superior to the general binning method. Numerical comparisons are also made to compare computational speeds and error bounds of the proposed methods with those of the linear binning and the direct implementation.

Suggested Citation

  • Tang, Qingguo & Karunamuni, Rohana J., 2016. "Fast and accurate computation for kernel estimators," Computational Statistics & Data Analysis, Elsevier, vol. 94(C), pages 49-62.
    • Handle: RePEc:eee:csdana:v:94:y:2016:i:c:p:49-62
    DOI: 10.1016/j.csda.2015.07.015
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    References listed on IDEAS

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    1. Gonzalez-Manteiga, W. & Sanchez-Sellero, C. & Wand, M. P., 1996. "Accuracy of binned kernel functional approximations," Computational Statistics & Data Analysis, Elsevier, vol. 22(1), pages 1-16, June.
    2. B. W. Silverman, 1982. "Kernel Density Estimation Using the Fast Fourier Transform," Journal of the Royal Statistical Society Series C, Royal Statistical Society, vol. 31(1), pages 93-99, March.
    3. Hall, Peter & Wand, M. P., 1996. "On the Accuracy of Binned Kernel Density Estimators," Journal of Multivariate Analysis, Elsevier, vol. 56(2), pages 165-184, February.
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