How can I find the optimize value of 'C' or ' Boxconstraint' for linear SVM ?

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sufian ahmed 2017-8-18

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https://ww2.mathworks.cn/matlabcentral/answers/353280-how-can-i-find-the-optimize-value-of-c-or-boxconstraint-for-linear-svm

I work with linear svm. but it not gives better output as I required.But when I change BoxConstraint it gives good output. now i want to do something so that i can find optimize value for "Boxconstraint".

tem = templateSVM('kernelFunction','linear','Solver','SMO','BoxConstraint', 16); 
classifier = fitcecoc(trainingFeatures,trainingLabels,'Learners',tem);