Table 5.
Confusion matrices illustrating accuracy of activity type classification
| Predicted Activity (nnetACT) |
||||
|---|---|---|---|---|
| Actual Activity | Household | Locomotion | Sports | %Correct |
| Accuracy of activity type identification predicted from nnetACT trained on UMass and validated on the independent data set from UTenn (n = 299 subject/activity combinations) | ||||
| Household | 151 | 2 | 1 | 98.1 |
| Locomotion | 9 | 77 | 0 | 89.5 |
| Sports | 41 | 4 | 14 | 23.7 |
| Overall | 80.9 | |||
| Cross-validation results (trained and validated on UMass using hold-one-out validation) (n = 2,453 subject/activity combinations) | ||||
| Household | 689 | 23 | 9 | 95.6 |
| Locomotion | 11 | 1,640 | 5 | 99.0 |
| Sports | 15 | 3 | 58 | 76.3 |
| Overall | 97.3 | |||
ACT, activity type. Note: List of activity type assignments is the same as in Table 4.