问fmincon和求解器过早停止的目标函数错误，MATLAB for loop

EN

[x,~,exitflag] = fmincon(fun,x0,A,b);

All Algorithms:

 1 %First-order optimality measure was less than options.OptimalityTolerance, and maximum constraint violation was less than options.ConstraintTolerance.
 0 %Number of iterations exceeded options.MaxIterations or number of function evaluations exceeded options.MaxFunctionEvaluations.
-1 %Stopped by an output function or plot function.
-2 %No feasible point was found.

All algorithms except active-set:

 2 %Change in x was less than options.StepTolerance and maximum constraint violation was less than options.ConstraintTolerance.

trust-region-reflective algorithm only:

 3 %Change in the objective function value was less than options.FunctionTolerance and maximum constraint violation was less than options.ConstraintTolerance.

active-set algorithm only:

 4 %Magnitude of the search direction was less than 2*options.StepTolerance and maximum constraint violation was less than options.ConstraintTolerance.
 5 %Magnitude of directional derivative in search direction was less than 2*options.OptimalityTolerance and maximum constraint violation was less than options.ConstraintTolerance.

interior-point, sqp-legacy, and sqp algorithms:

-3 %Objective function at current iteration went below options.ObjectiveLimit and maximum constraint violation was less than options.ConstraintTolerance.

error_counter = 0;
for ii = 1:n_iteration
    [x,~,exitflag] = fmincon(fun,x0,A,b);
    if exitflag ~= 1
        error_counter = error_counter + 1
    end
end