Solver based optimization passing extra parameters

My solver function is giving an error: Unrecognized function or variable 'aa'.

Error in untitled>constraintFcn (line 46)

c = sum(1./(1+exp(-x))*1./(1+exp(-y')).*(1.-aa),'all') - 0.1;

Error in fmincon (line 654)

[ctmp,ceqtmp] = feval(confcn{3},X,varargin{:});

Caused by:

Failure in initial nonlinear constraint function evaluation. FMINCON cannot continue.

Objective function is:

function f = objectiveFcn(optimInput)

x = optimInput(1:8124);
y = optimInput(8125:end);
f = -sum(1./(1+exp(-x))*1./(1+exp(-y')),'all');
end

function [c,ceq] = constraintFcn(optimInput)

x = optimInput(1:8124);
y = optimInput(8125:end);
c = sum(1./(1+exp(-x))*1./(1+exp(-y')).*(1.-aa),'all') - 0.1;
ceq = [];
end

I am using the solver based approach. Can you please tell me how can I pass the 'aa' variable inside the constraint function. I have seen the mathworks page but I couldn't implement it to my case. Can anyone please show me how can I do it for the solver based approach for my case.

Answer 1

[Matt J]

nonlcon=@(x)constraintFcn(x,aa)

See also, Passing Extra Parameters - MATLAB & Simulink

[Yagiz Dereboy]

I have seen this page but still couldn't work it out. It's I guess because I can not figure out how to do it for the solver GUI. For example, in the optimizer GUI solver is already given like

[solution,objectiveValue] = fmincon(@objectiveFcn,w,[],[],[],[],[],[],...

@constraintFcn,options4);

Here nonlcon = @constraintFcn but the solver doesn't allow me to change it. So I am not able to write what you said. I am trying to change constraintFcn itself to have the aa variable as an input such as function [c,ceq] = constraintFcn(optimInput,aa), but I get the Not enough input arguments then.

What I understand from the Passing extra parameters page maybe I need to write an extra function? Can you please ellobrate a bit more?

[Matt J]

You should be writing this:

aa=something;

nonlcon=@(x)constraintFcn(x,aa);

[solution,objectiveValue] = fmincon(@objectiveFcn,w,[],[],[],[],[],[],...
    nonlcon,options4);

[Yagiz Dereboy]

Sorry to bother you again but you see the solver GUI doesn't allow me to change fmincon function. Curser is a ghost as you can see. I can only change the constraintFcn but as you can see, @(x)constraintFcn(x,aa) writing is not working. I also tried to change it to nonlcon=@(x)constraintFcn(x,aa) to change the inside of the fmincon as you said but again this solver GUI is not letting me touch the fmincon.

[Matt J]

If you right-click on the task, you can convert it to editable code: