make.dwwt: Compute diagonal of the matrix WWT
In wavethresh: Wavelets Statistics and Transforms
make.dwwt R Documentation
Compute diagonal of the matrix WWT
Description
Computes the values which specify the covariance structure of complex-valued wavelet coefficients.
Usage
make.dwwt(nlevels, filter.number = 3.1, family = "LinaMayrand")
Arguments
nlevels
The number of levels of the wavelet decomposition.
filter.number, family
Specifies the wavelet used; see filter.select for more details.
Details
If real-valued signals are decomposed by a discrete wavelet transform using a complex-valued Daubechies wavelet (as described by Lina & Mayrand (1995)), the resulting coefficients are complex-valued. The covariance structure of these coefficients are determined by the diagonal entries of the matrix
WW^T. This function computes these values for use in shrinkage. For more details, see Barber & Nason (2004)
Value
A vector giving the diagonal elements of WW^T.
RELEASE
Part of the CThresh addon to WaveThresh. Copyright Stuart Barber and Guy Nason 2004.
Author(s)
Stuart Barber
See Also
cthresh
wavethresh documentation built on Nov. 16, 2022, 5:16 p.m.
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| make.dwwt | R Documentation |
Compute diagonal of the matrix WWT
Description
Computes the values which specify the covariance structure of complex-valued wavelet coefficients.
Usage
make.dwwt(nlevels, filter.number = 3.1, family = "LinaMayrand")
Arguments
nlevels |
The number of levels of the wavelet decomposition. |
filter.number, family |
Specifies the wavelet used; see filter.select for more details. |
Details
If real-valued signals are decomposed by a discrete wavelet transform using a complex-valued Daubechies wavelet (as described by Lina & Mayrand (1995)), the resulting coefficients are complex-valued. The covariance structure of these coefficients are determined by the diagonal entries of the matrix WW^T. This function computes these values for use in shrinkage. For more details, see Barber & Nason (2004)
Value
A vector giving the diagonal elements of WW^T.
RELEASE
Part of the CThresh addon to WaveThresh. Copyright Stuart Barber and Guy Nason 2004.
Author(s)
Stuart Barber
See Also
cthresh
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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