In the formula, accuracy indicates that KNN is correct under the verification data set. S indicates that the current data set contains all the features, indicates the number of selected features, and c is the weight coefficient.
accuracy indicates that the KNN is correct under the validation dataset. S represents all the features in the current dataset, represents the number of features selected, and c is a weight factor.
Where, accuracy indicates that KNN is correct under the validation data set. S represents all features in the current dataset, the number of selected features, and C is the weight coefficient.