InvBasis.wp: Invert a wp library representation with a particular basis...

In wavethresh: Wavelets Statistics and Transforms

Invert a wp library representation with a particular basis spec

Description

Inverts a wp basis representation with a given basis specification, for example an output from the MaNoVe function.

Usage

## S3 method for class 'wp'
InvBasis(wp, nvwp, pktlist, verbose=FALSE, ...)

Arguments

wp	The wavelet packet object you wish to invert.
nvwp	A basis specification in the format of a node vector (wp) object, obtained, eg by the MaNoVe.wp function
pktlist	Another way of specifying the basis. If this argument is not specified then it is generated automatically from the nvwp argument. If it is specified then it overrides the one generated by nvwp
verbose	If TRUE then informative messages are printed.
...	Other arguments, not used

Details

Objects arising from a wp.object specification are a representation of a signal with respect to a library of wavelet packet basis functions. A particular basis specification can be obtained using the numtonv function which can pick an indexed basis function, or MaNoVe.wp which uses the Coifman-Wickerhauser minimum entropy method to select a basis. This function takes a wp.object and a particular basis description (in a nv.object node vector object) and inverts the representation with respect to that selected basis.

The function can alternatively take a packet list pktlist specification which overrides the node vector if supplied. If the pktlist is missing then one is generated internally from the nvwp object using the print.nvwp function.

Value

The inverted reconstruction

Author(s)

G P Nason

See Also

InvBasis,MaNoVe.wp,numtonv,print.nvwp,wp

Examples

#
# The example in InvBasis.wst can be used here, but replaced wst by wp
#

wavethresh documentation built on Sept. 11, 2024, 9:33 p.m.