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wthcoef

1-D wavelet coefficient thresholding

Syntax

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)

Description

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 1N(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.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

See Also

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Introduced before R2006a