MATLAB Answers

GAO Si

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

Asked by GAO Si
on 7 Dec 2012

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

  1 Comment

'x' is an input argument or output argument?

1 Answer

Answer by Vishal Rane
on 7 Dec 2012
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) .

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