Decode.m

function ret=Decode(lenchrom,bound,code,opts)
% This function decodes chromosomes
% lenchrom   input : Chromosome length
% bound      input : Variable value range
% code       input £ºencoding values
% opts       input : Decoding Method Label
% ret        output: Decoded values of chromosomes
switch opts
    case 'binary' % binary coding
        for i=length(lenchrom):-1:1
        data(i)=bitand(code,2^lenchrom(i)-1);  
        code=(code-data(i))/(2^lenchrom(i));   
        end
        ret=bound(:,1)'+data./(2.^lenchrom-1).*(bound(:,2)-bound(:,1))';  %Segmental decoding, stored in ret as a real number vector
        
    case 'grey'   % grey coding
        for i=sum(lenchrom):-1:2
            code=bitset(code,i-1,bitxor(bitget(code,i),bitget(code,i-1)));
        end
        for i=length(lenchrom):-1:1
        data(i)=bitand(code,2^lenchrom(i)-1);
        code=(code-data(i))/(2^lenchrom(i));
        end
        ret=bound(:,1)'+data./(2.^lenchrom-1).*(bound(:,2)-bound(:,1))'; 
        
    case 'float'  
        ret=code; 
end