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//Find x in R^2 such that:
// An Unbounded Example
function y = fun(x)
y = -(x(1)^2 + x(2)^2);
endfunction
x0 = [1,2];
options=list("MaxIter", [1500], "CpuTime", [500], "Gradient", "OFF", "Hessian", "OFF");
//Output
//
//Iterates diverging; problem might be unbounded.
// hessian =
//
// []
// gradient =
//
// []
// output =
//
// Iterations: 65
// Cpu_Time: 0.112
// Message: "Iterates diverging; problem might be unbounded"
// exitflag =
//
// 8
// fopt =
//
// []
// xopt =
//
// []
[xopt,fopt,exitflag,output,gradient,hessian] = fminunc (fun, x0, options)
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