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Confusion matrix for deep belief networks. Note: 3-D (3-D acceleration), AMPR (fusion of 3-D acceleration, Magnitude, pitch and roll). Activities: 1—walk, 2—stand, 3—jog, 4—sit, 5—bike, 6—upstairs, 7—downstairs, 8—type, 9—write, 10—coffee, 11—talk, 12—smoke, 13—eat.
