waht does the command "cfs = read(wpt,'data') " return?
1 vue (au cours des 30 derniers jours)
Afficher commentaires plus anciens
wpt is the wavelet packet tree. does "cfs = read(wpt,'data') " return the sum of the coefficients of the tree nodes at the bottom level?
But the result is in fact different from the original signal?
Why?
thanks
0 commentaires
Réponse acceptée
Wayne King
le 27 Oct 2011
Hi,
cfs = read(wpt,'data');
returns the coefficients in the terminal nodes of the wavelet packet tree. These are not equal to the data.
For example:
dwtmode('per');
x = randn(16,1);
T = wpdec(x,3,'db2');
plot(T)
Now, click on (3,0) (3,1), (3,2) and so on.
You see in each one of these nodes, there are 4 coefficients. Since there are 8 such nodes, there are a total of 32 coefficients.
cfs = read(T,'data');
returns these 32 coefficients.
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Continuous Wavelet Transforms dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!