Is my code is correct for wavelet packet decomposition of EEG signal taken by emotiv (Sampling freq-128hz)?

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amit_neuro 2013-3-24

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Hi friends...........

i am something confused between wpcoef and wprec.

i wrote a code to decompose the signal x by wavelet packet decomposition and reconstruction upto 5th level.

% wavelet packet decomposition upto 5th level by db4 %

wpt = wpdec(x,5,'db4'); %( T = wpdec(X,N,'wname'))

% wavelet reconstruction

    C0 = wpcoef(wpt,[5 0]);
    C1 = wpcoef(wpt,[5 1]); 
    C2 = wpcoef(wpt,[5 2]); 
    C3 = wpcoef(wpt,[5 3]); 
    C4 = wpcoef(wpt,[5 4]); 
    C5 = wpcoef(wpt,[5 5]); 
    C6 = wpcoef(wpt,[5 6]); 
    C7 = wpcoef(wpt,[5 7]); 
    C8 = wpcoef(wpt,[3 1]); 
    C9 = wpcoef(wpt,[3 2]); 
 % different frequency bands
    Delta_x = C0; 
    Theta_x = C1; 
    Alpha_x = C2; 
    BetaL_x = [C3,C4,C5]; 
    BetaH_x = [C6,C7];
    Gamma_x = [C8,C9];