Wavelet Toolbox™

Reconstruct wavelet packet coefficients

Syntax

• X = wprcoef(T,N) 
  

Description

wprcoef is a one- or two-dimensional wavelet packet analysis function.

X = wprcoef(T,N) computes reconstructed coefficients of the node N of the wavelet packet tree T.

X = wprcoef(T) is equivalent to X = wprcoef(T,0).

Examples

• % The current extension mode is zero-padding (see dwtmode).
  
  % Load signal. 
  load noisdopp; x = noisdopp;
  
  figure(1); subplot(211); 
  plot(x); title('Original signal');
  
  % Decompose x at depth 3 with db1 wavelet packets 
  % using Shannon entropy. 
  t = wpdec(x,3,'db1','shannon');
  
  % Plot wavelet packet tree. 
  plot(t)
  
  
  % Reconstruct packet (2,1). 
  rcfs = wprcoef(t,[2 1]);
  
  figure(1); subplot(212); 
  plot(rcfs); title('Reconstructed packet (2,1)');
  
  
  

See Also
wpdec, wpdec2, wprec, wprec2

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