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. 2016 Oct 19;10:15. doi: 10.3389/fnbot.2016.00015

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Copyright © 2016 Adewuyi, Hargrove and Kuiken.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Probability of selection of the 25 features using the SFS method. Features are ordered from most to least often selected for amputee and non-amputee subjects. Mean absolute value (MAV), zero crossings (ZC), slope-sign changes (SSC), waveform length (WL), Willison amplitude (WAMP), root-mean-square (RMS), variance (VAR), v-order (V-ord, order of 3), log-detector (LogDet), autoregressive (AR1–AR6) coefficients, mean frequency (MnF), median frequency (MdF), peak frequency (PF), mean power (MP), and power spectrum descriptors (PSD1–PSD6). Error bars represent SE. (A) Extrinsics, (B) intrinsics, and (C) extrinsics and intrinsics.

Probability of selection of the 25 features using the SFS method. Features are ordered from most to least often selected for amputee and non-amputee subjects. Mean absolute value (MAV), zero crossings (ZC), slope-sign changes (SSC), waveform length (WL), Willison amplitude (WAMP), root-mean-square (RMS), variance (VAR), v-order (V-ord, order of 3), log-detector (LogDet), autoregressive (AR1–AR6) coefficients, mean frequency (MnF), median frequency (MdF), peak frequency (PF), mean power (MP), and power spectrum descriptors (PSD1–PSD6). Error bars represent SE. (A) Extrinsics, (B) intrinsics, and (C) extrinsics and intrinsics.