I am beginner of Matlab. While I use MATLAB to solve the problem of constrained nonlinear optimization, "Lack of input arguments" are always warning.Did someonecan tell me how to slove this probrem?THx

function f=optfun(x) f=-x(1)*x(2)*x(3); %fmincon_example.m X0=[1,1,1]; A=[1,2,2;0,1,0;0,0,1]; b=[72;5;10]; x=fmincon(optfun,X0,A,b) end

[Muruganandham Subramanian]

'x' is an input argument or output argument?

Answer 1

[Vishal Rane]

function f=optfun(x)
   f=-x(1)*x(2)*x(3); %fmincon_example.m 
   X0=[1,1,1];
   A=[1,2,2;0,1,0;0,0,1];
   b=[72;5;10];
   x=fmincon(optfun,X0,A,b) 
end

You are not providing the input x to optfun when passing it as an input to fmincon (last line) .