%每個種群中的個體數(shù)目
NIND = 20;           
%最大代數(shù)
MAXGEN = 100;        
GGAP = .8;           

SEL_F = 'sus';       % 選擇函數(shù)
XOV_F = 'xovsp';    % 交叉函數(shù)
MUT_F = 'mut';     % 變異函數(shù)
OBJ_F = 'objfun1';   % 目標函數(shù)

% 目標函數(shù)的邊界
   FieldDR = feval(OBJ_F,[],1);

% 目標函數(shù)變量的數(shù)目
   NVAR = size(FieldDR,2);   

% 描述矩陣
   PRECI = 20;    
   FieldDD = [rep([PRECI],[1, NVAR]);...
              FieldDR;...
              rep([1; 0; 1 ;1], [1, NVAR])];

%生成種群
   Chrom = crtbp(NIND, NVAR*PRECI);
gen = 0;
Best = NaN*ones(MAXGEN,1);
% 遺傳迭代
while gen < MAXGEN,
% 計算目標函數(shù)
      ObjV = feval(OBJ_F,bs2rv(Chrom, FieldDD));
      Best(gen+1) = min(ObjV);
      plot(log10(Best),'bo');
      xlabel('generation');
      ylabel('log10(Best)');
 
   % 適度分配
      FitnV = ranking(ObjV);            
   % 選擇個體
      SelCh = select(SEL_F, Chrom, FitnV, GGAP);     
   % 交叉
      SelCh=recombin(XOV_F, SelCh);
   % 變異
      SelCh=mutate(MUT_F, SelCh);
   %插入子代
      Chrom = reins(Chrom, SelCh);
      gen=gen+1;      
   end