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Kernel type integer codes

Source: R/semipar_bridge.R
kernel-codes.Rd

Integer codes used by morie's C++ semiparametric bridge to select the kernel function for local-polynomial smoothing. Mirror the Python morie.semipar.KernelType enum so an R caller can pass these constants directly to any C++ kernel routine.

Usage

KERNEL_GAUSSIAN

KERNEL_EPANECHNIKOV

KERNEL_UNIFORM

KERNEL_TRIANGULAR

KERNEL_BIWEIGHT

Format

Integer scalars (0L, 1L, 2L, 3L, 4L).

Details

  • KERNEL_GAUSSIAN: \(K(u) = (1/\sqrt{2\pi}) \exp(-u^2/2)\)

  • KERNEL_EPANECHNIKOV: \(K(u) = (3/4)(1-u^2)\) on |u| <= 1

  • KERNEL_UNIFORM: \(K(u) = 1/2\) on |u| <= 1

  • KERNEL_TRIANGULAR: \(K(u) = 1 - |u|\) on |u| <= 1

  • KERNEL_BIWEIGHT: \(K(u) = (15/16)(1-u^2)^2\) on |u| <= 1