wprcoef
Reconstruct wavelet packet coefficients
Syntax
X = wprcoef(T,N)
X = wprcoef(T)
X = wprcoef(T,0)
Description
wprcoef is a one- or
two-dimensional wavelet packet analysis function.
X = wprcoef( computes
reconstructed coefficients of the node T,N)N of the
wavelet packet tree T.
X = wprcoef( is
equivalent to T)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)');
Introduced before R2006a