About separate train and test data

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About separate train and test data


For instance, we have separate train and test data files (not want to do k
fold), so we will not use the function trainControl? In that case if we
have to tune the parameters, do we need to specify search =grid in the
train function?

My second question is how we can measure MCC classification measure? Is it
same like metric=Roc in the train function?

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