How to apply a random Crossover (Arithmetic/Scattered/Two-point) in Genetic Algorithm using auto-generated file from Optimization Toolbox ?

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Ankur Shah 2020-8-10

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https://ww2.mathworks.cn/matlabcentral/answers/577609-how-to-apply-a-random-crossover-arithmetic-scattered-two-point-in-genetic-algorithm-using-auto-gen

回答： Walter Roberson 2021-1-25

I have prepared a code in MATLAB with optimization toolbox which seems to be giving fair results for different optimization functions but at present, accuracy is highly dependent on the type of crossover selected.

To take advantage of different crossover and to improve efficiency, i want to apply a random crossover after every iteration i.e. any of Arithmetic, Scattered or Two-point. How can I do that ?

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Ankur Shah 2020-8-11

编辑：Ankur Shah 2020-8-11

Can u please explain where can it be applied ?.. At present I have prepared crossover code using optimization toolbox as follows

options = optimoptions(options,'CrossoverFcn', @crossoverscattered)

Walter Roberson 2020-8-11

options = optimoptions(options,'CrossoverFcn', @MyCustomCrossover)
function varargout = MyCustomCrossover(varargin)
  crossfcns = {@crossoverarithmetic, @crossoverheuristic, @crossoveritnermediate, @crossoverscattered, @crossoversinglepoint, @crossovertwopoint};
  chosen = crossfcns{randi(length(crossfcns))} ;
  [varargout{:}] = chosen(varargin{:}) ;
end

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Walter Roberson 2021-1-25

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options = optimoptions(options,'CrossoverFcn', @MyCustomCrossover)
function varargout = MyCustomCrossover(varargin)
crossfcns = {@crossoverarithmetic, @crossoverheuristic, @crossoveritnermediate, @crossoverscattered, @crossoversinglepoint, @crossovertwopoint};
chosen = crossfcns{randi(length(crossfcns))} ;
[varargout{:}] = chosen(varargin{:}) ;
end

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Sulaymon Eshkabilov 2020-8-11

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https://ww2.mathworks.cn/matlabcentral/answers/577609-how-to-apply-a-random-crossover-arithmetic-scattered-two-point-in-genetic-algorithm-using-auto-gen#answer_477901

GA_drop_down.jpg

See the screen shot given in the attachement. You should select from the drop-down options whichever crossover function suits for your task.

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Walter Roberson 2021-1-24

I show using a literally random crossover in https://www.mathworks.com/matlabcentral/answers/577609-how-to-apply-a-random-crossover-arithmetic-scattered-two-point-in-genetic-algorithm-using-auto-gen#comment_968707

Ankur Shah 2021-1-25

编辑：Ankur Shah 2021-1-25

Hi, Yes the code worked perfectly. I was trying to to tag your answer as Accepted but couldn't do. Apologies for confusion... Could you have a look at this question https://in.mathworks.com/matlabcentral/answers/725727-how-to-find-function-and-variable-value-at-each-iteration-for-genetic-algorithm-with-parallel-comput?s_tid=prof_contriblnk

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