i need help ( compression ecg data with wavelet and max lloyd quantifc )

% Lloyd-max algorithm using signal values 
 
% Signal      : Signal Vector 
% tol         : Tolerance  
% Initial     : Sampling levels 
% dist        : distortion 
% quant       : Sampled values 
% breakpoints : Breakpoints 
 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 
% Declarations %
t = 0:.1:2*pi; % 
Signal = sin(t); %exemple of signal 
Initial=125;
tol=1e-5;
L = length(Initial);            % Number of quantization levels 
breakpoints = zeros(L-1,1);     % Breakpoints for levels 
Old_Initial = -Initial ;        % Old Initial for iterations 
 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 
% Max - Lloyd Algorithm % 
 
while (norm(Initial-Old_Initial)/norm(Initial)) > tol 
     
    % Updating breakpoints % 
    breakpoints = 0.5*(Initial(1:end-1)+Initial(2:end));  
     
    % Updating levels 
    Old_Initial = Initial;  
        
    % Avoid getting zero % 
    if sum( Signal , breakpoints(1) )>=1  
       Initial(1) = mean(Signal(Signal , breakpoints(1)));  
    end 
                                           
    for i = 2: 1 : L-1, 
        if sum(Signal > breakpoints(i-1) & Signal <breakpoints(i))>=1 
           Initial(i) = mean(Signal(Signal>breakpoints(i-1) & Signal<breakpoints(i))); 
        end 
    end 
     
    if sum(Signal>breakpoints(L-1))>=1 
       Initial(L) = mean(Signal(Signal>breakpoints(L-1))); 
    end 
      
end 
 
% Quantizing with new levels % 
[indx, quant, dist] = quantiz(Signal,breakpoints,Initial);