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

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];

Are the Delta_x, Theta_x ,Alpha_x, BetaL_x, BetaH_x, Gamma_x the real reconstructed signal to use further for featute extraction or not?

how should i use here wprec?

please tell me as soon as possible?