R: Compute specialized wavelet transform for density estimation

wd.dh {wavethresh}

R Documentation

Compute specialized wavelet transform for density estimation

Description

Computes the discrete wavelet transform, but with zero boundary conditions especially for density estimation.

Usage

wd.dh(data, filter.number = 10, family = "DaubLeAsymm", type = "wavelet",
    bc = "periodic", firstk = NULL, verbose = FALSE)

Arguments

`data`	The father wavelet coefficients
`filter.number`	The smoothness of the underlying wavelet to use, see `filter.select`
`family`	The wavelet family to use, see `filter.select`
`type`	The type of wavelet to use
`bc`	Type of boundarie conditions
`firstk`	A parameter that originates from `denproj`
`verbose`	If `TRUE` then informative messages are printed.

Details

This is a subsidiary routine, not intended for direct user use for density estimation. The main routines for wavelet density estimation are denwd, denproj, denwr.

The input to this function should be projected father wavelet coefficients as computed by denproj, but usually supplied to this function by denwd.

Thresholding should be carried out by the user independently of these functions.

Value

An object of class wd, but assumed on the basis of zero boundary conditions.

Author(s)

David Herrick