MATLAB: Using explcit parameters in fsolve gives error, how to solve this

Question

I have numerical values assigned to several parameter.

Using these parameters, I want solve fsolve such as below.

But it keeps giving error messages saying that the parameters are

not defined. Should I write every numbers instead of characters in

the function? Help me, please!

g=0.03;   %gamma
b=0.45;   %beta
a=0.3;   %alpha
aa=2.5222;   %1+alphabeta/beta
rho=0.5;   %rho
r=1+rho*b/(1+a*b);   %1+rho/1+alphabeta
th1=0.000045;   %theta1
th2=0.000037;   %theta2
R=900;   %Resource
S=210;   %S_-1
B=1/(1-a-g);   %1/1-alpha-gamma
A12=1.5;
A11=1.2;
A02=1.9;
A01=1.8;
    F = @(E)[2.52*( g/E(2) - r*(th1+W*th2) ) - g/E(1) + (th1+W*th2);
2.52*( g/E(4) - r*(W*th1+th2) ) - g/E(3) + (W*th1+th2);
R - ( E(1)+E(2)+E(3)+E(4) );
((exp( -th2*( rho*S +E(2) + E(4) ) ))/(exp( -th1*( rho*S +E(2) + E(4) ) ))*A02/A01)^(B)-E(4)/E(2);
((exp( -th2*( rho*( rho*S +E(2) + E(4) ) +E(1) + E(3) ) ))/(exp( -th1*( rho*( rho*( rho*S +E(2) + E(4) ) +E(1) + E(3) ) )))*A12/A11)^(B)-E(1)/E(3);
W-E(4)/E(2);
E(4)/E(2)-E(3)/E(1)];
 E0=[300];
options=optimset('Display','iter');
E=fsolve(@planerenergy, E0, options)

ps. I also tried to make the function as seperate function such as

xx.m file. But it still gives the same error message such as

??? Undefined function or variable 'g'.

Error in ==> planerenergy at 2 F = [2.52*( g/E(2) – r*(th1+W*th2) ) – g/E(1) + (th1+W*th2);

Error in ==> fsolve at 248 fuser = feval(funfcn{3},x,varargin{:});

Error in ==> calibration0329 at 27 E=fsolve(@planerenergy, E0, options) Caused by: Failure in initial user-supplied objective function evaluation. FSOLVE cannot continue.

Answer 1

Your code shows many lines devoted to creating the function handle F. Then you don't seem to use F in your fsolve function call.

It is possible that you are not passing parameters correctly. Take a look at http://www.mathworks.com/help/toolbox/optim/ug/brhkghv-7.html

Alan