MATLAB: How to define two variable in GA

gagenetic algorithmGlobal Optimization Toolbox

I need write two variable in matlab global opt. toolbox.

First x(i,j,k) and another y(i,j)

x(i,j,k) is a binary variable and y(i,j) not binary.how can i define they ? for example, what should i write in nvars section?

and how can i write

sum(x(i,j,k))=<y(i,k)

Best Answer

nvars should be number of elements in x plus number of elements in y.

use [reshape(x,1,[]),reshape(y,1,[])] as the vector of values. You can extract portions and reshape inside the objective function.

intcons 1:numel(x)

Related Solutions

MATLAB: How to write linear equalities in GA ? – please answer please

nvars should be the total number of unknowns, so 6*6 = 36 in your case.

Linear equalities are expressed through the Aeq beq argument pair.

T = ones(1,6);
Aeq = blkdiag(T,T,T,T,T,T);
beq = ones(6,1);

MATLAB: How to write an if loop in a nested for loop

Welcome to the world of floats. Just as you can't write 1/3 in decimal with a finite number of digits, computers can't store exact values sometimes. Run the code below and you will have your answer.

radiusincrement = 1;
thetaincrement = 45;
thetatotal=3;
k=1;
for i=1:1:5/radiusincrement %two for loops that will sweep through wafer points
    for j=1:1:thetatotal
         r(i,j) = (i-1)*radiusincrement;
         theta(i,j) = (j-1)*thetaincrement;
         x(i,j) = r(i,j).*cos(theta(i,j).*pi/180);
         y(i,j) = r(i,j).*sin(theta(i,j).*pi/180);
         point = [x(i,j) y(i,j) 0];
         
         if point(1)==point(2)
             kx(k)=x(i,j);
             ky(k)=y(i,j);
             k=k+1;
         elseif abs(point(1)-point(2))<=(1e-10)
             disp('you should have compared against a tolerance')
         end
    end
end

Two side notes:

If x and y are equal, why bothering storing them separately?

Did you consider doing this with an array operation?

Best Answer

Related Solutions

MATLAB: How to write linear equalities in GA ? – please answer please

MATLAB: How to write an if loop in a nested for loop

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