wprcoef (Wavelet Toolbox)

Wavelet Toolbox

wprcoef

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

wpjoin wprec