decode.m

MATLAB的遗传算法工具

function ret=Decode(lenchrom,bound,code,opts)
% In this function ,it decode chromosome 
% lenchrom   input : length of chromosome
% opts       input : tag of coding method
% bound      input : boundary of varibles
% ret        output: value of varibles
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))';
    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'  % float coding
        ret=code;
end