SpherWave (version 1.2.2)

thresh.level: Level-dependent Thresholding of SW Coefficients

Description

This function calculates level-dependent thresholded SW coefficients.

Usage

thresh.level(x, norm, policy, Q, type)

Arguments

x

coefficients of multiscale SBF's

norm

norm of multiscale SBF's (SW)

policy

threshold technique. At present the possible policies are `"universal"', `"fdr"' and `"Lorentz"'.

Q

parameter for the false discovery rate of `"fdr"' policy.

type

the type of thresholding. This can be `"hard"', `"soft"' or `"Lorentz"'.

Value

tgamma

level-dependent thresholded SW coefficients

References

Donoho, D.~L. and Johnstone, I.~M. (1994) Ideal spatial adaptation by wavelet shrinkage. Biometrika, 81, 425--455.

Oh, H-S. (1999) Spherical wavelets and their statistical analysis with applications to meteorological data. Ph.D. Thesis, Department of Statistics, Texas A\&M University, College Station.

Oh, H-S. and Li, T-H. (2004) Estimation of global temperature fields from scattered observations by a spherical-wavelet-based spatially adaptive method. Journal of the Royal Statistical Society Ser. B, 66, 221--238.

See Also

mrs.comp.thresh.level