Regarding Genetic Algorithm Optimization- How to stop GA tool after each generation

Question

Mohamed 2014-5-25

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https://ww2.mathworks.cn/matlabcentral/answers/131028-regarding-genetic-algorithm-optimization-how-to-stop-ga-tool-after-each-generation

评论： Luuk VK 2017-6-5

Hello,

I am using GA as optimization tool for my work. I am exchanging data between MATLAB & other software called gPROMS. There is a link between the two softwares so, I am not asking how link them. I would like to use GA to optimize an objective function in gPROMS but I need to stop GA after each generation to send the result to gPROMS then get new inputs back to GA. Is there a way to stop GA after each generation knowing that I don't want to write the GA code but I need to use GAtool.

Thanks in advance

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Luuk VK 2017-6-5

Hello Mohamed,

I am trying to link MATLAB and gPROMS as well for the use of GA, have you succeeded in coupling the programmes and running the algorithm effectively?

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Answer 1

George Papazafeiropoulos 2014-5-25

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https://ww2.mathworks.cn/matlabcentral/answers/131028-regarding-genetic-algorithm-optimization-how-to-stop-ga-tool-after-each-generation#answer_138156

在 MATLAB Online 中打开

t=0.2; % or any other reasonable time value
while exist('filename.extension','file')==2
    pause(t)
end

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Mohamed 2014-5-25

Thanks a million. As I understand, this will stop the operation of GA after certain time interval. However, I can't control the number of iterations per unit time as it depends on many factors such as the pc processor for example. If you can help me with stopping gatool after each generation, I will be grateful. Thanks for your help and all your advices are welcome

George Papazafeiropoulos 2014-5-25

The file named 'filename.extension' will be a file that is created during the analysis of gPROMS and is supposed to stay there till the analysis is completed. If this file exists, MATLAB goes into the while loop and pauses. As soon as the analysis of gPROMS finishes, the above file is erased automatically by gPROMS, the while loop is not executed, and MATLAB proceeds to further execution. Of course, for the above to be applied, gPROMS must generate a file named 'filename.extension', the existence of which will show that gPROMS is running

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