is my fitness fuction true?

i want to solving economic dispatch with gravitational search algorithm with this function:

F_index==24
    Ca=[200 180 140];
    Cb=[7 6.8 6.3];
    Cc=[0.008 0.009 0.007];
    Pd=150;
    i=1:3;
fit=sum(Cc(:,i).*(L(i).^2)+Cb(:,i).*(L(i))+Ca(:,i))+(Pd+sum(Cb(:,i)./(2*Cc(:,i))))*(abs(sum(L(i))-Pd-(0.000218*(L(1)^2)+0.000228*(L(2)^2)+0.000179*(L(3)^2))));
end

is that true function? or i must modified other file to make Pd=L(1)+L(2)+L(3)?

[Walter Roberson]

What is the point of using Cb(:,i) with i=1:3 and Cb being a 1 x 3 vector? Why not just code as Cb without any indexing?

What is "L" here?

[dimas bramanthya]

i just add this to the test_function.m in gravitational search algorithm(esmat rashedi) to solving economic dispatch. the result of this code is worse than any literature i have. so where i can add or modified GSA to solve my problem?