I am using genetic algorithm optimization toolbox. i have done evrything i am also getting output and all. but i want is i want the output in particular range.

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harsh Brar 2022-3-9

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1667199-i-am-using-genetic-algorithm-optimization-toolbox-i-have-done-evrything-i-am-also-getting-output-a

编辑： harsh Brar 2022-3-14

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

For example

function t=compST(input)
x(1) = input(1);
x(2) = input(2)
x(3) = input(3)
x(4) = input(4)
x(5) = input(5)
t = 122.14-0.84.*x(1)-0.42.*x(2)+0.34.*x(3)-0.09.*x(4)+363.77.*x(5);
output = [t]

here t is compressive strenth . i want the t in range of 40-80 MPA range how can i do that

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采纳的回答

Walter Roberson 2022-3-9

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1667199-i-am-using-genetic-algorithm-optimization-toolbox-i-have-done-evrything-i-am-also-getting-output-a#answer_913454

编辑：Walter Roberson 2022-3-10

https://www.mathworks.com/help/gads/custom-output-function-for-genetic-algorithm.html

If you are using ga() then the above link shows you how to halt if the function value is within a specified value.

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Walter Roberson 2022-3-10

在 MATLAB Online 中打开

options = optimoptions('ga', 'FitnessLimit', 400, 'MaxGenerations', 1e5);
A = []; b = []; Aeq = []; beq = []; lb = []; ub = []; nonlcon = [];
obj = @(x) (compST(x)-60).^2;
bestx = ga(obj, 5,  A, b, Aeq, beq, lb, ub, nonlcon, options);
Optimization terminated: minimum fitness limit reached.
display(bestx)
bestx = 1×5
   -7.4205   -9.9567    3.9257    7.0063   -0.2431
display(compST(bestx))
   44.8276
function t=compST(x)
    t = 122.14-0.84.*x(1)-0.42.*x(2)+0.34.*x(3)-0.09.*x(4)+363.77.*x(5);
end