dksum

<p>Fast computation of kernel derivative sums. Called by multiple functions exported by the package, but not
  intended for alternative use.</p>

internal

Implements the method of Hofmeyr, D.P. (2019) <DOI:10.1109/TPAMI.2019.2930501> for fast evaluation of univariate kernel smoothers based on recursive computations.
Applications to the basic problems of density and regression function estimation are provided, as well as some projection pursuit methods
for which the objective is based on non-parametric functionals of the projected density, or conditional density of a response given projected
covariates.

dksum: Kernel derivative sums

Description

Arguments