MATLAB: Invalid problem structure error when using GlobalSearch

globalsearchlscqcurvefitoptimization

When I use lsqcurvefit(problem) & run(multistart,problem) – I get no errors with my problem structure but now that I am attempting GlobalSearch I get an error message:
Error using AbstractGlobalSolver/checkProblem (line 227)
Invalid problem structure: missing required field or invalid field value.
Error in GlobalSearch/run (line 305)
        obj.checkProblem(problem, probRequiredFields, probValidValues);
My code is as follows:
        xrise = xdata(1:300);
        yrise = ydata(1:300);
        options = optimoptions('lsqcurvefit');
        TolFun_Data = 1e-4;
        TolX_Data= 1e-4;
        FinDiffRelStep_Data=[0.01];
        MaxIter_Data = 1e5
        options = optimoptions(options,'Display', 'final');
        options = optimoptions(options,'MaxIter', MaxIter_Data);
        options = optimoptions(options,'TolFun', TolFun_Data);
        options = optimoptions(options,'TolX', TolX_Data);
        options = optimoptions(options,'FunValCheck', 'off');
        options = optimoptions(options,'Algorithm', 'trust-region-reflective');
        options = optimoptions(options,'Diagnostics', 'off');
        options = optimoptions(options,'FinDiffRelStep', FinDiffRelStep_Data);
        options = optimoptions(options,'FinDiffType', 'central');
        options = optimoptions(options,'Jacobian', 'off');
        options = optimoptions(options,'JacobPattern', 'sparse(ones(jrows,jcols))');
        options = optimoptions(options,'TypicalX', 'ones(numberofvariables,1)');
        x0 = [0.05];
        lb = [0.05];
        ub = [0.3];
        problem =createOptimProblem('lsqcurvefit','x0',x0,...
            'objective',@myfuncTi,'xdata',xrise,'ydata',...
            yrise,'lb',lb,'ub',ub,'options',options);
        gs=GlobalSearch;
        [TiVal fval exitflag output solutions]=run(gs,problem)

Best Answer

GlobalSearch does not accept lsqcurvefit as a local solver. If you want to use GlobalSearch, your only choice of local solver is fmincon.
I think that error message could be improved. I will look into it.
Alan Weiss
MATLAB mathematical toolbox documentation
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