MATLAB optimset function syntax error with medium-scale option

[sunny2010100]

MATLAB who can help me to solve this question??thanks first!

after performance，it comes out ：

? options = optimset('medium-scale ', 'on')；
|
Error: Missing variable or function.

why？？

 

[cronxeh]

There is no 'medium-scale', only LargeScale.

>> optimset('LargeScale','on')

ans = 

                   Display: []
               MaxFunEvals: []
                   MaxIter: []
                    TolFun: []
                      TolX: []
               FunValCheck: []
                 OutputFcn: []
           ActiveConstrTol: []
        NoStopIfFlatInfeas: []
            BranchStrategy: []
           DerivativeCheck: []
               Diagnostics: []
             DiffMaxChange: []
             DiffMinChange: []
         GoalsExactAchieve: []
                GradConstr: []
                   GradObj: []
                   Hessian: []
                  HessMult: []
               HessPattern: []
                HessUpdate: []
           InitialHessType: []
         InitialHessMatrix: []
                  Jacobian: []
                 JacobMult: []
              JacobPattern: []
                LargeScale: 'on'
        LevenbergMarquardt: []
            LineSearchType: []
                  MaxNodes: []
                MaxPCGIter: []
                MaxRLPIter: []
                MaxSQPIter: []
                   MaxTime: []
             MeritFunction: []
                 MinAbsMax: []
       NodeDisplayInterval: []
        NodeSearchStrategy: []
          NonlEqnAlgorithm: []
      PhaseOneTotalScaling: []
            Preconditioner: []
          PrecondBandWidth: []
            RelLineSrchBnd: []
    RelLineSrchBndDuration: []
          ShowStatusWindow: []
                   Simplex: []
                    TolCon: []
                    TolPCG: []
                 TolRLPFun: []
               TolXInteger: []
                  TypicalX: []