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. Author manuscript; available in PMC: 2018 Mar 21.
Published in final edited form as: Physiol Meas. 2016 Sep 21;37(10):1813–1833. doi: 10.1088/0967-3334/37/10/1813

Figure 2.

Figure 2

Univariate correlation between features and walking speed (target variable). The minimal subset of features used for mobility assessment is bolded. AVG, average; STD, standard deviation; AC, activity counts; Ai, ith axis (e.g. A1= axis 1); VM, vector magnitude; NO, number of. The black bars were selected by machine learning techniques in Table 3 and the ranking algorithm described in the methods.