AAL Middleware Infrastructure for Green Bed Activity Monitoring
Figure 10
Classification performance using and the SVM algorithm: (a) shows the error rate as a function of the number of features of sensor , evaluated at 1, 2, 4, and 8 Hz; the features considered were , , LCR2, and LCR4, (b) shows true positive and false positive Rates for each bed position, two features of the sensor ( and ), (c) shows the error rate as a function of the number of features for each sensor at 4 Hz, and (d) shows true positive and false positive rates at 4 Hz for each bed position for each sensor, two features .
