wpcutree

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)

Version History

Introduced before R2006a