A Mobile Application for Easy Design and Testing of Algorithms to Monitor Physical Activity in the Workplace

Table 10

Small displacement subclassifier performances.

(a) Performance by cumulative indexes

Correctly classified instances	86.65%
Incorrectly classified instances	13.35%
Kappa statistic	0.719
Mean absolute error	0.116
Root mean squared error	0.269
Relative absolute error	35.91%
Root relative squared error	66.92%

(b) Confusion matrix

	Classified as
	Walking	Upstairs	Downstairs
Walking	2787	65	58
Upstairs	105	515	123
Downstairs	96	123	399

(c) Detailed accuracy by class

Precision	Recall	-score	Class
0.933	0.958	0.945	Walking
0.733	0.693	0.712	Upstairs
0.688	0.646	0.666	Downstairs
0.862	0.867	0.864	Weighted average