MATLAB: Error with FMINCON – Failure in initial user-supplied objective function evaluation

errorfminconoptimization

Hi everybody,
I'm trying to run an optimization problem with FMINCON, but I keep getting the following error:
Error using ObjFun (line 3)
Not enough input arguments.
Error in fmincon (line 564)
    initVals.f = feval(funfcn{3},X,varargin{:});
Caused by:
  Failure in initial user-supplied objective function evaluation. FMINCON cannot continue.
This is the objective function:
function f= ObjFun (x,NumConnections,NodesToSearchFrom)
for t=1:NumConnections
  DistCN(:,t)=abs(x(t)-NodesToSearchFrom);
end
for t=1:NumConnections
  [Di(t), indx(t)]=min(DistCN(:,t));
end
f=sum(Di);
… and these are the constraints that are in another function:
function [c, ceq] = SideConstraints(x,NumConnections,NumInterNodes,UnfeasibleNodeArea,LowerBound,UpperBound,ConnectionCentre)
for k=1:NumConnections
  for q=1:NumInterNodes
      NodeConstraintsB(q,k)=x(k)-UnfeasibleNodeArea(q,1);
      NodeConstraintsA(q,k)=-x(k)+UnfeasibleNodeArea(q,2);
  end
end
c_B=reshape(NodeConstraintsB,[],1);
c_A=reshape(NodeConstraintsA,[],1);
c=[c_B;c_A;-x+LowerBound;x-UpperBound];
DistBetConnections=abs(ConnectionCentre(1)-ConnectionCentre(2));
ceq=[abs(x(1)-x(2))-DistBetConnections];
And the script to call the optimization procedure is this:
x0=[LowerBound; LowerBound+ConnectionCentre(2)];x=x0;
f= ObjFun (x,NumConnections,NodesToSearchFrom)
[c,ceq]=SideConstraints(x,NumConnections,NumInterNodes,UnfeasibleNodeArea,LowerBound,UpperBound,ConnectionCentre);
options=optimset('Display','iter');
OptimalResult=fmincon(@ObjFun,x0,[],[],[],[],[],[],@SideConstraints,options)
The general data is is another script but it's long so I didn't copy it here.
I've changed many things within the functions,including the input arguments but still can't work it out. I appreciate very much any help!
Best, Martha

Best Answer

OptimalResult = fmincon(@(x) ObjFun(x,NumConnections,NodesToSearchFrom), x0, [], [], [], [], [], [], @SideConstraints, options)
Provided that NumConnections and NodesToSearchFrom are static for any one optimization.
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