MATLAB Answers

Setting lower and upper bounds in 'ga' algorithm.

19 views (last 30 days)
Ande Mandoyi
Ande Mandoyi on 10 Oct 2020
Commented: Learner123 on 27 Apr 2021
I am trying to find the global minimum of the Ackley function using a genetic algorithm 'ga'. My code works fine until i try to add lower and upper bounds then I get errors. Please help me add the bounds to my code.
function y = myFitness(x)
y = -20.*exp(-0.2.*sqrt(0.5.*(x(1).^2+ x(2).^2))) - exp(0.5.*(cos(2.*pi.*x(1)))+(cos(2.*pi.*x(2))))+exp(1)+20;
end
clc
FitFcn = @myFitness;
nvars = 2;
lb = [-5 5];
ub = [5 5];
[x, fval] = ga(FitFcn, nvars)

Accepted Answer

Ameer Hamza
Ameer Hamza on 10 Oct 2020
See the lb and ub arguments: https://www.mathworks.com/help/gads/ga.html. For example
FitFcn = @myFitness;
nvars = 2;
lb = [-5 5];
ub = [5 5];
[x, fval] = ga(FitFcn, nvars, [], [], [], [], lb, ub)
  3 Comments
Learner123
Learner123 on 27 Apr 2021
Hi,
I have a similar issue. When I set lb and ub
I am getting an error.
Error using ga
Too many input arguments.
Any help is greatly appreciated. Thanks in advance

Sign in to comment.

More Answers (0)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!