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

### See Also

`denproj`, `denwd`

[Package wavethresh version 4.6.8 Index]