Multiobjective function Minimizati​on/Maximiz​ation

Hello, I have the following function CL=f(x1,x2,x3) CD=f(x1,x2,x3)

where 1<x1<7 1<x2<7 1<x3<12

I'm not able to set the Multiobjective genetic algorithm in order to obtain the Pareto front, and I don't understand how to specified the function that I want to minimize and the other that I want to maximize.

Someone can help me?

[MD NOUSHAD JAVED]

You should use multiobejctive optimization GUI tool box of ga. You may put these three 1<x1<7 1<x2<7 1<x3<12 as a constraint (upper and lower level). Such type of objective called constraint problem in ga. you may search over matlab or google or youtube for quick and easy solution.

you may click on video link present in this question.

link- for-optimization-using-genetic-algorithm-ga--with-three-different-objectives-as-goal

Answer 1

[Alan Weiss]

All optimization solvers attempt to minimize. To maximize an objective, minimize its negative.

Also, write your objective functions as function of one variable only, not three separate variables. And you set your bounds as described here.

I suggest that you look at some of the examples in the documentation.

Good luck,

Alan Weiss

MATLAB mathematical toolbox documentation