1-D wavelet coefficient thresholding
NC = wthcoef('d',C,L,N,P)
NC = wthcoef('d',C,L,N)
NC = wthcoef('a',C,L)
NC = wthcoef('t',C,L,N,T,SORH)
wthcoef thresholds wavelet
coefficients for the denoising or compression of a 1-D signal.
NC = wthcoef('d',C,L,N,P) returns coefficients
obtained from the wavelet decomposition structure [C,L] (see wavedec for more information), by rate
compression defined in vectors N and P. N contains
the detail levels to be compressed and P the corresponding
percentages of lower coefficients to be set to zero. N and P must
be of same length. Vector N must be such that 1 ≤ N(i) ≤ length(L)-2.
NC = wthcoef('d',C,L,N) returns coefficients
obtained from [C,L] by setting all the coefficients
of detail levels defined in N to zero.
NC = wthcoef('a',C,L) returns coefficients
obtained by setting approximation coefficients to zero.
NC = wthcoef('t',C,L,N,T,SORH) returns
coefficients obtained from the wavelet decomposition structure [C,L] by
soft (if SORH ='s') or hard (if SORH ='h') thresholding (see wthresh for more information) defined
in vectors N and T. N contains
the detail levels to be thresholded and T the corresponding
thresholds. N and T must be
of the same length.
[NC,L] is the modified wavelet decomposition
structure.