Fval Output by ga does not match output of fitness function evaluated at the respective x vector
1 view (last 30 days)
Show older comments
Francisco Barrera
on 13 Jun 2019
Commented: Francisco Barrera
on 14 Jun 2019
Hello all,
I have been using ga to minimize a fitness function of mine, but have recently come across some issues concerning the output. After running for several hours (the fitness function is quite dense), the ga outputs an x vector along with an fval, which is supposed to be the fitness function evaluated at this x value. However, when I take the x-vector and input it into the fitness function manually, it returns a value different from the fval.
My ga setup is the following:
%Contraints and function
rng default
FitFcn = @FullDevice;
nvars = 3;
lb = [1,20,5];
ub = [5,100,10];
IntCon = [1];
%optomization algorithm
[x,fval,exitflag] = ga(FitFcn,nvars,[],[],[],[],lb,ub,[],IntCon,[])
As an example, on my most recent optimization, the x and fval output were the following
x =
3.0000 20.0000 5.0333
fval =
-199.1417
But,
> FullDevice([3 20 5.0333])
ans =
-189.8933
Any thoughts as to why this is happening? Thanks!
0 Comments
Accepted Answer
More Answers (0)
See Also
Categories
Find more on Get Started with Optimization Toolbox in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!