problem based approach- script running but does not gives a solution
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hello everyone i am working on a problem where i choosed problem based approach to solve it. I am very new to MATLAB so i do not know what i am doing wrong but here is my question:
the script is running but it does not gives me any solution it just says 'Solving problem using ga' (i want to solve with ga). I dont think it iterates. I have set stopping criterias that is not the problem. I have been looking to find answers to my problem but could not find any. Anyhow, if you have any ideas why i am facing this situation and suggestions to solve it i would be appreaciated.
Thank you in advance!
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Matt J
am 10 Apr. 2022
Be mindfull of the (-1) in your function,
z= (-1)*sum(x.*rij.*ai,'all');
Because you have set ObjectiveSense="maximize", the (-1) makes it so that you are effectively minimizing z= sum(x.*rij.*ai,'all').
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Matt J
am 10 Apr. 2022
There is only one objective, and two constraints so far and they all are linear. When i write my objective function it forces me to use ga. Did not understand why.
It forces you to use ga() because you have specified your objective function using fcn2optimexpr(). When you specify it as below, the solver can tell right away that it is an integer linear program, and solves it very quickly with initlinprog,
load Problem
x=problem.Variables.x;
y=problem.Variables.y;
problem.Objective=sum((x.*rij)*ai);
sol=solve(problem);
sol.x=round(sol.x);
sol.y=round(sol.y);
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