Print more iteration detail in GA code

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Maryam 2018-10-31

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https://ww2.mathworks.cn/matlabcentral/answers/427269-print-more-iteration-detail-in-ga-code

评论： Alan Weiss 2018-11-1

I have written a GA code, and I want to print out the variable's value at each iteration. Would you please let me know what command should I use for this matter? Thank you.

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Answer 1

Alan Weiss 2018-11-1

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https://ww2.mathworks.cn/matlabcentral/answers/427269-print-more-iteration-detail-in-ga-code#answer_344579

Take a look at Custom Output Function for Genetic Algorithm. This enables you to get all population members at each iteration (if you modify the example just a bit).

Unless all you want is the best fitness function value at each iteration, in which case all you need to do is set the 'Display' option to 'iter'.

Alan Weiss

MATLAB mathematical toolbox documentation

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Maryam 2018-11-1

Thanks for your answer Alan! I don't want to get the population for each iteration! I used 'Display' option with 'iter', but that just shows the variables value in a graph! I actually want MATLAB to print the values out so I can have the exact numbers for each variable at each iteration!

Alan Weiss 2018-11-1

Again, I'm not sure that I understand exactly what you want. At each iteration there is a population. Perhaps what you want is the best individual at each iteration, the one that gives the lowest fitness function. In that case, look at the Custom Output Function example and just take bestx (which is a row vector containing the variables that I believe you want); you don't need the rest of the stuff for plotting and for saving the whole population.

Alan Weiss

MATLAB mathematical toolbox documentation

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