wavDaubechies( wavelet = ``d6", normalize = F )
EXTREMAL PHASE (daublet): ``haar", ``d2", ``d4", ``d6", ``d8", ``d10", ``d12", ``d14", ``d16", ``d18", ``d20"
LEAST ASYMMETRIC (symmlet): ``s2",``s4", ``s6", ``s8", ``s10", ``s12", ``s14", ``s16", ``s18", ``s20"
BEST LOCALIZED: ``l2",``l4", ``l6", ``l14", ``l18", ``l20"
COIFLET: ``c6", ``c12", ``c18", ``c24", ``c30"
Default: ``s8".Only relevant for Daubechies filter types. Inconsistent ordering of the coefficients in Daubechies' book was recognized and corrected by Percival (see references). The ``correct'' order is given here.
(1) D. B. Percival and A. T. Walden, ``Wavelet Methods for Time Series Analysis'', Cambridge University Press, 2000.
(2) I. Daubechies, ``Orthonormal Bases of Compactly Supported Wavelets'', Communications on Pure and, Applied Mathematics, 41, 909-96.
## obtain Daubechies least asymmetric 8-tap filter set filters <- wavDaubechies( "s8", normalize = T ) ## display filter information print( filters ) ## plot the impulse responses plot( filters, type = "time" ) ## plot the gain function plot( filters, type = "gain" ) ## access the filter data wavelet <- filters$wavelet scaling <- filters$scaling