MATLAB数学建模(9)-遗传算法工具

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MATLAB自带的遗传算法工具箱是GADS,输入help ga即可看到ga的用法，ga函数最完整的格式是[X,FVAL,EXITFLAG,OUTPUT,POPULATION,SCORES]=GA(FITNESSFCN,NVARS,A,b,Aeq,beq,lb,ub,NONLCON,options)，
如计算函数y=100*(x1^2 - x2)^2 + (1-x2)^2的最大值，x1和x2都在范围[-2.048,2.048]内:

>> [x,val,flag,output,population,scores]=ga(@(x)-100*(x(1)^2-x(2))^2-(1-x(1))^2, 2, [],[],[],[],[-2.048, -2.048], [2.048, 2.048]) Optimization terminated: average change in the fitness value less than options.TolFun.x =    2.0480   -2.0466val =  -3.8960e+03flag =     1output =       problemtype: 'boundconstraints'         rngstate: [1x1 struct]      generations: 51        funccount: 1040          message: [1x86 char]    maxconstraint: 0population =    2.0480   -2.0466    2.0480   -2.0466    2.0480   -2.0466    2.0480   -2.0466    2.0480   -2.0466    2.0480   -2.0466    2.0480   -2.0466    2.0480   -2.0434    2.0480   -2.0466    2.0480   -2.0466    2.0480   -2.0466    2.0480   -2.0466    2.0480   -2.0466    2.0480   -2.0466    2.0480   -2.0466    2.0480   -2.0466    2.0480   -2.0427    2.0441   -2.0463    2.0480   -2.0466    2.0475   -2.0427scores =   1.0e+03 *   -3.8960   -3.8960   -3.8960   -3.8960   -3.8960   -3.8960   -3.8960   -3.8918   -3.8959   -3.8960   -3.8960   -3.8960   -3.8959   -3.8960   -3.8959   -3.8960   -3.8911   -3.8757   -3.8959   -3.8883

另外，输入ga可以直接在图形界面上进行操作。

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