Why each time algorithm "interior point" is shown in output even if I use different algorithm?

1 view (last 30 days)
My fitness function is as below:
function out=myfitness(b)
u = [1 2 3 4];
out1 = u-b;
out = sum(out1.^2,2);
When I use the following code
clear all
FUN = @myfitness;
%OPTIONS =optimoptions('fmincon','Algorithm','sqp'); % For SQP
%OPTIONS =optimoptions('fmincon','Algorithm','sqp-legacy'); % For SQP-Legacy
%OPTIONS =optimoptions('fmincon','Algorithm','trust-region-reflective'); % For Trust-region reflective
OPTIONS =optimoptions('fmincon','Algorithm','active-set'); % For Active Set
xo = [pi/2 pi/2 pi/2 pi/2]; % Starting point
%[x,fval] = patternsearch(ObjectiveFunction,x0); % For patternsearch
[x,fval,exitflag,output]= fmincon(FUN,xo);
It gives me my result. But when I check output variable "output", I see that each time "interior-point" is written in the algorithm inspite of the fact I use active-set or sqp or sqp-legacy i.e.,
output =
struct with fields:
iterations: 2
funcCount: 15
constrviolation: 0
stepsize: 2.9075
algorithm: 'interior-point'
firstorderopt: 3.9890e-08
cgiterations: 0
message: 'Local minimum found that satisfies the constra…'
Why it is so?

Accepted Answer

Alan Weiss
Alan Weiss on 22 Apr 2021
You didn't pass the options to fmincon.
[x,fval,exitflag,output]= fmincon(FUN,xo,[],[],[],[],[],[],[],OPTIONS);
Alan Weiss
MATLAB mathematical toolbox documentation

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!

Translated by