How to find global minimum of a schwefel function

26 views (last 30 days)
I am trying to find the global minimum of a schwefel function which is 0 at [420.9687,..., 420.9687]. I have used 'fmincon', Particle swarm Optimization algorithm (I'm using my code for this approach) and some other evolutionary algorithms. But none of them is giving global minimum at 0, All are giving some large positive value. Can anybody tell me how can I find global minimum of the schwefel function.
function y = schwefel(x)
s = sum(-x.*sin(sqrt(abs(x))));
y = 418.9829*length(x) + s;
  1 Comment
Pedro on 29 Mar 2020
Its a benchmark function, it has many local minima in a short space
So general purpose algorithms get stock in its multiple minima

Sign in to comment.

Answers (2)

Sulaymon Eshkabilov
Sulaymon Eshkabilov on 29 Mar 2020
You can try optimization toolbox's fsolve nonlinear equation solver with "Trust region dogleg" algorithm.

amir ansari
amir ansari on 5 Sep 2020
you can try cuckoo search on this problem, schwefel function is a hard function for optimizition algorithm even PSO..but cuckoo can solve it better... trust me!

Community Treasure Hunt

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

Start Hunting!

Translated by