Wavelet Toolbox™

Cut wavelet packet tree

Syntax

• T = wpcutree(T,L)
  [T,RN] = wpcutree(T,L)
  

Description

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

T = wpcutree(T,L) cuts the tree T at level L.

[T,RN] = wpcutree(T,L) returns the same arguments as above and, in addition, the vector RN contains the indices of the reconstructed nodes.

Examples

• % The current extension mode is zero-padding (see dwtmode).
  
  % Load signal. 
  load noisdopp; x = noisdopp;
  
  % Decompose x at depth 3 with db1 wavelet packets
  % using Shannon entropy.
  wpt = wpdec(x,3,'db1');
  
  % Plot wavelet packet tree wpt. 
  plot(wpt)
  
  
  % Cut wavelet packet tree at level 2. 
  nwpt = wpcutree(wpt,2);
  
  % Plot new wavelet packet tree nwpt. 
  plot(nwpt)
  
  
  

See Also
wpdec, wpdec2

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