frequency-domain or frequency-domain!.
NB: Lifting schemes used in this library do not preserve the
norm (or energy) of a signal, they roughly preserve the average of a
signal in the first half of a transformed array. This will result in
unnormalized output produced by functions described in this section.
frequency-domain!(array &key (wavelet haar) (boundary-style zero))Translate a signal into frequency domain using PWT. wavelet and
boundary-style have the same meaning as in dwt!. This function
modifies the array.
NB: CDF-4-2 gives very poor results for the reasons yet unknown. Do not use it. CDF-2-2 seems to be the best.
frequency-domain(array &key (wavelet haar) (boundary-style zero))Translate a signal in frequency domain using PWT. This is a
non-destructive version of
frequency-domain!.