Table 2

Precision of Random Forest algorithms for each activity class/intensity for two cases in three phone locations; right hand, right pocket and backpack

Case 3Backpack
precision
Pocket
precision
Hand
precision
7MET0.980.980.98
5MET0.830.830.83
3MET0.950.950.93
Walking0.940.960.95
Sitting0.960.970.96
Lying0.970.980.98
Case 4Backpack
precision
Pocket
precision
Hand
precision
7MET0.870.850.85
5MET0.840.840.82
3MET0.650.640.60
Walking0.630.640.62
Sitting0.620.620.65
Lying0.700.700.75
  • Case 3 includes raw accelerometer data and 58 features. Case 4 includes the vector magnitude of activity counts and 58 features.

  • MET, Metabolic Equivalent Task.