The effectiveness of simple heuristic features in sensor orientation and placement problems in human activity recognition using a single smartphone accelerometer

Table 2 Averaged values of evaluation metrics for each inter-position case

Smartphone position for the training set	Smartphone position for test set	Accuracy (%)	Precision (%)	Recall (%)	F1-score (%)
Pocket	Backpack	67.80	69.56	66.93	65.00
Pocket	Hand	62.39	63.27	64.20	60.86
Backpack	Pocket	62.62	66.68	63.59	61.45
Backpack	Hand	59.03	61.64	60.60	58.23
Hand	Pocket	64.10	66.09	62.92	60.38
Hand	Backpack	68.66	69.95	67.07	64.77

ISSN: 1475-925X