Not enough input arguments Error

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Kam Selley
Kam Selley 2012-9-24
Hello,
I am not that experienced with Matlab errors and was wondering if anyone could help me with why I keep getting this error:
Error using MaxFunctionProblem (line 73)
Not enough input arguments.
Error in fmincon (line 601)
initVals.f = feval(funfcn{3},X,varargin{:});
Error in MaxFunExe (line 25)
[P,W,U,Wprime,Uprime,fval] =
fmincon(@MaxFunctionProblem,x0,[],[],[],[],[],[],@confun,options);
Caused by:
Failure in initial user-supplied objective function evaluation. FMINCON
cannot continue.
Below is my complete program including the functions:
function E = MaxFunctionProblem(P,W,U,Wprime,Uprime)
% Function Formulations
% Multiobjective function
D1 = 0.2;
a = 2;
b = 0.2;
d = 0.1;
e = 2;
k = 1;
P1 = 1;
P2 = 6;
W1 = 1;
W2 = 5;
U1 = 1;
U2 = 6;
W3 = 10;
L = 10;
a2 = 0.01;
b2 = 0.005;
i = 1;
g = 0.1;
t = 0;
r = mvnrnd (0,6);
Theta0 = .005;
Theta1 = .01;
Theta2 = .01;
Theta3 = .02;
Inf = 50;
% Expected Unit Profit
% Unknown variables: P,W,U, Uprime, Unit Price
Pprime = 0.2;
v = (0.1*Pprime);
% Expected Unit Production Costs
Ltr = Theta0+(Theta1*r)+(Theta2+(Theta3*r))*t;
FuncEct = @(t,L)(a2 + (b2/(Ltr^i)))*(1-(g*(t)));
ECTf = integral(FuncEct,t,L);
% ECTf = @ExpUnitProdCost;
%%%%%%Expected Unit Profit %%%%%%
% q = integral(fun,xmin,xmax) example
% q = integral(fun,xmin,xmax,Name,Value)
%FuncEct = @(t,L)(a2 + (b1/(Ltr^i)))*(1-(g*t));
%ExpUnitProdCostX = integral(ECTf,t,L);
Lfun = @(t,r)Theta0+(Theta1*r)+((Theta2+(Theta3*r)).*t);
L1 = integral2(Lfun,t,W,r,(U/W));
L2 = integral2(Lfun,t,(U/r),(U/W),Inf);
Cs = 0.05*P;
ExpUnitWarCost = Cs*(L1 + L2);
ExpUnitProfit = (P + v) - ECTf - ExpUnitWarCost;
%%%%%%Expected increase in market share %%%%%%
Pprime = .2;
D = D1/((P1^(-a))*((W2 + k)^b)*U2^d);
Q = (D*(P^(-a))*((W + k)^b)*(U^d));
Qprime = (D*(P^(-a))*((Wprime + k)^b)*(((Uprime)^d)*((1 + v)^(-e))));
ExpIncMarketShare = (Pprime*Qprime) + ((1 - Pprime))*Q - Q;
%%%%%%Unit Price %%%%%
UnitPrice = P;
%%%%%%Market share without extension of warranty %%%%%%
MarShareWOExtWar = Q;
E = -(ExpUnitProfit*ExpIncMarketShare)/(UnitPrice*MarShareWOExtWar);
function [c, ceq] = confun(P,W,U,Wprime,Uprime)
P1 = 1;
P2 = 6;
W1 = 1;
W2 = 5;
U1 = 1;
U2 = 6;
W3 = 10;
U3 = 12;
c = [-P + P1;
P - P2;
-W + W1;
W - W2;
-U + U1;
U - U2;
-Wprime + W
Wprime - W3
-Uprime + U
Uprime - U3];
ceq = [];
x0 = [3,4,4,2,2];
options = optimset('Algorithm','active-set');
[P,W,U,Wprime,Uprime,fval] = fmincon(@MaxFunctionProblem,x0,[],[],[],[],[],[],@confun,options);
I am trying to find the minimization for 5 unknown variables using 5 constraints. Since this is kind of a complicated problem, i am sort of lost now. Any help would be greatly appreciated. Thanks :)

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采纳的回答

Alan Weiss
Alan Weiss 2012-9-24
I wonder if you understand what type of arguments fmincon is expecting. The quantities you want to optimize should be in a single vector, usually called x. So if you want to find values of P, W, U, Wprime, and Uprime, you should write your objective and constraint functions to take a vector x, and then say things like
function E = MaxFunctionProblem(x)
P = x(1);
W = x(2);
U = x(3);
...
function [c, ceq] = confun(x)
P = x(1);
W = x(2);
U = x(3);
...
etc.
Also, I wonder about your statement Inf = 50. I believe you should not override MATLAB's value.
Alan Weiss
MATLAB mathematical toolbox documentation
  1 个评论
Kam Selley
Kam Selley 2012-9-25
Thanks a lot for the clarification! That definitely helped. I did change the inf bound.

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