How to solve error when using fitcsvm to replace svmtrain ?

There is error, when I try to replace svmtrain using fitcsvm as follow, anyone know how to solve it?

model = svmtrain(labelVecBinTrain,featureMatTrain,['-t 0 -b 1 -w1 1 ' '-w-1 ' num2str(unbalanced_weight) ]);

model = fitcsvm(labelVecBinTrain,featureMatTrain,['-t 0 -b 1 -w1 1 ' '-w-1 ' num2str(unbalanced_weight) ]);

Error using internal.stats.parseArgs

(line 42)

Wrong number of arguments.

Error in

classreg.learning.paramoptim.parseOptimizationArgs

(line 10)

[OptimizeHyperparameters,HyperparameterOptimizationOptions,~,RemainingArgs]

= internal.stats.parseArgs(...

Error in fitcsvm (line 339)

[IsOptimizing, RemainingArgs] =

classreg.learning.paramoptim.parseOptimizationArgs(varargin);

Error in mainAuthentication (line

224)

model =

fitcsvm(labelVecBinTrain,featureMatTrain,['-t

0 -b 1 -w1 1 ' '-w-1 '

num2str(unbalanced_weight) ]);