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. 2015 Mar 10;9(5):509–522. doi: 10.1007/s11571-015-9336-2

Fig. 3.

Fig. 3

The trend of performances versus the number of selected features using four criteria (T-test, Entropy, ROC, and Bhattacharyya) for KNN (K = 1, the distance: Euclidean, and the rule: nearest) for the time-domain features. The best criterion is T-test with 200 features and above 84.5 % performance