Hybrid Scheme in the Genetic Algorithm.

Question

Ba Ba Black Sheep! 2017-1-5

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/319239-hybrid-scheme-in-the-genetic-algorithm

回答： Walter Roberson 2017-1-5

Why doesn't neither of the following codes compile?

 function  genetic()
    FitnessFcn = @dejong2fcn;
    numberOfVariables = 2;
    options = optimoptions(@ga,'PlotFcns',{@gaplotbestf,@gaplotstopping});
    rng('default');
    ga(FitnessFcn,numberOfVariables,[],[],[],[],[],[],[],options);
 end

.

 function hybrid()    
    fminuncOptions = optimoptions('Display','iter','Algorithm','quasi-newton');
    options = optimoptions('HybridFcn',{@fminunc, fminuncOptions});
    options = optimoptions(options,@ga,'PlotFcns',{@gaplotbestf,@gaplotstopping});
    ga(@dejong2fcn,numberOfVariables,[],[],[],[],[],[],[],options);
 end

I have written that code just like the following documentation.

Ref : Hybrid Scheme in the Genetic Algorithm

Then, what is the issue?

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Answer 1

Walter Roberson 2017-1-5

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/319239-hybrid-scheme-in-the-genetic-algorithm#answer_249535

在 MATLAB Online 中打开

First one:

Undefined function or variable 'dejong2fcn'.

Second one: you have not properly passed the solver names in.

fminuncOptions = optimoptions(@fminunc,'Display','iter','Algorithm','quasi-newton');
options = optimoptions(@ga,'HybridFcn',{@fminunc, fminuncOptions});
options = optimoptions(options,'PlotFcns',{@gaplotbestf,@gaplotstopping});