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From: maria on 5 Nov 2009 06:56
Hello ,

I am here again as I need your assistance.

My function are:

%main function

p=[500;500];

for k=1:4

[x, fval, history] = myproblem([p]);


end


and

function [x, fval, history] = myproblem(x0)

p=x0;

history = [];
options = optimset('OutputFcn',
@myoutput,'LargeScale','off','MaxFunEvals',2000,'TolX',1.0E-6);
% lb=293*ones(2,1);
%ub=2200*ones(2,1);


% [x,fval,exitflag,output,resnorm]=lsqnonlin
(@calculx2,x0,lb,ub,options);
[x,fval,exitflag,output,resnorm]=lsqnonlin(@calculx2,x0,[],
[],options);

function stop = myoutput(x,optimvalues,state)%optimvalues,
stop = false;
if isequal(state,'iter')
history = [history; x];
end
end



function [objf] = calculx2(x)

for i=1:2

F(i)= p(i)- x(i);
end

objf=sqrt(F(1)^2 + F(2)^2);
end


end

% The value of x is used in another function.


My problem is that

objf =

NaN

and so x is Nan

Any idea what I use wrong?

Thank you,
Maria
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