fmincon() error too many input arguments

Dear peer users,

I got stuck with fmincon(). I tried different approaches but all showed different errors.

#1 codes are:

out=(f1-1)^2+(f2-1)^2+(f3-1)^2+(f4-1)^2;

x1=sym('x1',[1 4]);

subs(out,{x,phi,lamda2,lamda4},{x1(1),x1(2),x1(3),x1(4)});

out1=matlabFunction(out);

x0=[pi/6 pi/6 -1 -2];

lb=[0 0 -20 -20];

ub=[2*pi 2*pi 0 0];

[x1,fval,exitflag,output]=fmincon(out1,x0,[],[],[],[],lb,ub);

Errors are: ??? Error using ==> sym.matlabFunction>@()NaN Too many input arguments.

Error in ==> fmincon at 574 initVals.f = feval(funfcn{3},X,varargin{:});

Error in ==> solveequs_new at 77 [x1,fval,exitflag,output]=fmincon(out1,x0,[],[],[],[],lb,ub); Caused by: Failure in initial user-supplied objective function evaluation. FMINCON cannot continue.

#2: Codes are out=(f1-1)^2+(f2-2)^2+(f3-3)^2+(f4-4)^2;

x1=sym('x1',[1 4]);

subs(out,{x,phi,lamda2,lamda4},{x1(1),x1(2),x1(3),x1(4)});

x0=[pi/6 pi/6 -1 -2];

lb=[0 0 -20 -20];

ub=[2*pi 2*pi 0 0];

[x1,fval,exitflag,output]=fmincon(@(x1)out,x0,[],[],[],[],lb,ub);

errors are ??? Error using ==> sym.sym>notimplemented at 2621 Function 'ge' is not implemented for MuPAD symbolic objects.

Error in ==> sym.sym>sym.ge at 823 notimplemented('ge');

Error in ==> nlconst at 739 elseif f >=0

Error in ==> fmincon at 758 [X,FVAL,LAMBDA,EXITFLAG,OUTPUT,GRAD,HESSIAN]=...

Error in ==> solveequs_new at 76 [x1,fval,exitflag,output]=fmincon(@(x1)out,x0,[],[],[],[],lb,ub);

I understand I need to convert symbolic expression to function. But either of above is now working. Can you tell me why?

Thanks!

Answer 1

[Walter Roberson]

For more information about the "too many input parameters" problem, please see my comments in your previous question about minimization.