wpcutree (Wavelet Toolbox)

Cut wavelet packet tree.

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

Description

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

[T,D] = wpcutree(T,D,L) cuts the tree T at level L and computes the corresponding data structure D (see maketree).

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

Examples

% Load signal. 
    load noisdopp; x = noisdopp;

% Decompose x at depth 3 with db1 wavelet packets. 
    [wpt,wpd] = wpdec(x,3,'db1');

% Plot wavelet packet tree structure wpt. 
    plottree(wpt)




% Cut wavelet packet tree at level 2. 
    [nwpt,nwpd] = wpcutree(wpt,wpd,2);

% Plot new wavelet packet tree structure wpt. 
    plottree(nwpt)