wthresh (Wavelet Toolbox)

Perform soft or hard thresholding.

Y = wthresh(X,SORH,T)

Description

Y = wthresh(X,SORH,T) returns the soft (if SORH = 's') or hard (if SORH = 'h') T-thresholding of the input vector or matrix X. T is the threshold value.

Y = wthresh(X,'s',T) returns

, soft thresholding is wavelet shrinkage.

Y = wthresh(X,'h',T) returns

, hard thresholding is more crude.

Examples

% Generate signal and set threshold. 
    y = linspace(-1,1,100); 
    thr = 0.4;

% Perform hard thresholding. 
    ythard = wthresh(y,'h',thr);

% Perform soft thresholding. 
    ytsoft = wthresh(y,'s',thr);