multiobjective optimization problem (NSGA)

Question

adam 2014-8-12

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/147376-multiobjective-optimization-problem-nsga

编辑： Yu Jiang 2014-8-13

Hi all, I am trying to perform multi objective optimization and this is my function

f

unction [y, cons] = TMS_CONSTR_objfun(x)
y = [0 0];
cons = [];
x(1:10)=1;
d(1:10)=0;
sp(1:10)=0;
y(1)=sum(x(1:10));
for h=1:10
    d(h)=x(h)*xe(h);
    sp(h)=x(h)*ve(h);
end
dd=d(d~=0);
spp=sp(sp~=0);
n=length(dd);
for j=2:n-1 y(2)=abs(((dd(1)+dd(2))/(2*spp(1)))+9.7-((x(n)+x(n-1))/(2*spp(n))+ sum((x(j+1)-x(j-1))/(2*spp(j))))); end

I keep received an error: Undefined function or variable 'x'.

why?

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Answer 1

Yu Jiang 2014-8-13

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/147376-multiobjective-optimization-problem-nsga#answer_148388

编辑：Yu Jiang 2014-8-13

Hi Adam

It seems that you are executing the nonlinear function itself. If that is the case, I wonder what is the expected answer? Also, would you let me know what is the output cons for?

if you want to optimize this function, you need to use one of the optimization solvers in MATLAB, such as fmincon and fminsearch. The documentations are given as below:

http://www.mathworks.com/help/optim/ug/fmincon.html

http://www.mathworks.com/help/matlab/ref/fminsearch.html

For multiobjetive optimization, you can refer to

http://www.mathworks.com/help/gads/multiobjective-optimization.html