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wavethresh (version 4.6.1)

mprefilter: Multiwavelet prefilter

Description

A multiwavelet prefilter turns a univariate sequence into a bivariate (in this case) sequence suitable for processing by a multiwavelet transform, such as mwd. As such, the prefilter is used on the forward transform.

Not intended for direct user use.

Usage

mprefilter(data, prefilter.type, filter.type, nlevels, nvecs.c,
    nphi, npsi, ndecim, verbose = FALSE)

Arguments

data
The univariate sequence that you wish to turn into a multivariate one
prefilter.type
Controls the type of prefilter (see Tim Downie's PhD thesis, or references therein. Types include Minimal, Identity, Repeat, Interp, default, Xia, Roach1,
filter.type
The type of multiwavelet: can be Geronimo or Donovan3
nlevels
The number of levels in the multiwavelet transform
nvecs.c
Parameter obtained from the mfirst.last function related to the particular filters
nphi
The number of father wavelets in the system
npsi
The number of mother wavelets in the system
ndecim
The ndecim parameter (not apparently used here)
verbose
If TRUE then informative messages are printed as the function progresses

Value

  • The appropriate prefiltered data.

Details

Description says all

See Also

mpostfilter,mwd