MATLAB: Nonlcon : Too many input arguments.

fminconnonlcon

Hi everybody, I have a problem with non linear constraints in fmincon. I get this error "Too many input arguments".

The nonlcon function is very simple:

function [c,ceq] = covposdef(x)
c = -x(3)*x(5)+x(4)^2;
ceq = [];
end

The function to optimize is a likelihood of a bivariate normal density. Any suggestion?

Best Answer

I think the problem is that FMINCON thinks your fixed "data" is meant to be passed both to meancov and covposdef. If you intend only to pass it to meancov, call FMINCON using the following more modern syntax

theta = fmincon(@(x) meancov(x,data),iv,[],[],[],[],lb,ub,@covposdef,options);

Related Solutions

MATLAB: Fmincon error message ‘Too many input arguments’

fmincon(@HourlyCost,x0,[],[],[],[],lb,[],[],options) says that HourlyCost is to be the objective function. Objective functions are always passed the current x value (the parameter whose value is to produce the minimum result). But your HourlyCost function is defined to take no arguments.

Your objective function is not required to use the parameter that is passed in, but it is required to accept a parameter.

function Cost_h=HourlyCost(X)

I have to ask, though, why you are asking to minimize something whose value is fixed? If your HourlyCost is always going to return the same result for all arguments then there isn't anything to minimize.

MATLAB: Optimization Constraints

I think i can use the argument nonlcon in fmincon function.

function [cineq ceq] = nonlcon(x)
ceq sum(abs(x))-1;
cineq = [];
end
fmincon(@myfun,A,b,Aeq,beq,lb,ub,@nonlcon,options);

Anyone can confirm that?

Best Answer

Related Solutions

MATLAB: Fmincon error message ‘Too many input arguments’

MATLAB: Optimization Constraints

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