How I can impliment my objective function inside this GA?
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Sourasis Chattopadhyay
le 11 Déc 2022
Commenté : Star Strider
le 13 Déc 2022
How I can impliment my objective function inside this GA?
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Star Strider
le 11 Déc 2022
Since ‘objective function’ implies curve fitting, try something like this —
x = 1:0.1:10;
y = 2.5*exp(-(x-5).^2/2)+randn(size(x))*0.25;
objfcn = @(b,x) b(1).*exp(-(x-b(2)).^2*b(3));
fitnessfcn = @(b) norm(y-objfcn(b,x));
Parms = 3;
[B,fval] = ga(fitnessfcn, Parms)
figure
plot(x, y, '.')
hold on
plot(x, objfcn(B,x), '-r')
hold off
grid
The parameter estimates here (2.69, 4.97, 0.666) are reasonably accurate when compared to the actual parameters (2.5, 5.0, 0.5) in this relatively simple problem. The norm of the residuals is 2.71.
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