FeatureDefinitions.md

title	author	date	output
Feature Definitions	Thanneer Malai Perumal	Mon Jun 26 17:46:41 2017	html_document

Tapping

Feature Name	Definition
meanTapInter	mean tapping interval
medianTapInter	median tapping interval
iqrTapInter	interquartile range tapping interval
minTapInter	minimum tapping interval
maxTapInter	maximum tapping interval
skewTapInter	skewness tapping interval
kurTapInter	kurtosis tapping interval
sdTapInter	standard deviation tapping interval
madTapInter	mean absolute deviation tapping interval
cvTapInter	coefficient of variation tapping interval
rangeTapInter	range tapping interval
tkeoTapInter	teager-kaiser energy operator tapping interval
ar1TapInter	autocorrelation (lag = 1) tapping interval
ar2TapInter	autocorrelation (lag = 2) tapping interval
fatigue10TapInter	difference in mean tapping interval between the first and last 10% of the tapping interval series
fatigue25TapInter	difference in mean tapping interval between the first and last 25% of the tapping interval series
fatigue50TapInter	difference in mean tapping interval between the first and last 50% of the tapping interval series
meanDriftLeft	mean drift in the left button
medianDriftLeft	median drift in the left button
iqrDriftLeft	interquartile range of drift in the left button
minDriftLeft	minimum of drift in the left button
maxDriftLeft	maximum of drift in the left button
skewDriftLeft	skewness of drift in the left button
kurDriftLeft	kurtosis of drift in the left button
sdDriftLeft	standard deviation of drift in the left button
madDriftLeft	mean absolute deviation of drift in the left button
cvDriftLeft	coefficient of variation of drift in the left button
rangeDriftLeft	range of drift in the left button
meanDriftRight	mean drift in the right button
medianDriftRight	median drift in the right button
iqrDriftRight	interquartile range of drift in the right button
minDriftRight	minimum of drift in the right button
maxDriftRight	maximum of drift in the right button
skewDriftRight	skewness of drift in the right button
kurDriftRight	kurtosis of drift in the right button
sdDriftRight	standard deviation of drift in the right button
madDriftRight	mean absolute deviation of drift in the right button
cvDriftRight	coefficient of variation of drift in the right button
rangeDriftRight	range of drift in the right button
numberTap	number of taps
buttonNoneFreq	frequency where neither the left or right buttons were hit
corXY	correlation between the X and Y coordinates of the hits

Voice

Feature Name	Definition
Median F0	Median of all possible pitch estimates
Mean Jitter	Mean of all possible jitter estimates
Median Jitter	Median of all possible jitter estimates
Mean Shimmer	Mean of all possible shimmer estimates
Median Shimmer	Median of all possible shimmer estimates
MFCC Band 1	Mel-Frequency Cepstrum Band 1
MFCC Band 2	Mel-Frequency Cepstrum Band 2
MFCC Band 3	Mel-Frequency Cepstrum Band 3
MFCC Band 4	Mel-Frequency Cepstrum Band 4
MFCC Jitter Band 1 Positive	Positive change in Mel-Frequency Cepstrum Band 1 over time
MFCC Jitter Band 2 Positive	Positive change in Mel-Frequency Cepstrum Band 2 over time
MFCC Jitter Band 3 Positive	Positive change in Mel-Frequency Cepstrum Band 3 over time
MFCC Jitter Band 4 Positive	Positive change in Mel-Frequency Cepstrum Band 4 over time

Walk

Feature Name	Definition
meanX	mean of the X acceleration series
sdX	standard deviation of the X acceleration series
modeX	mode of the X acceleration series
skewX	skewness of the X acceleration series
kurX	kurtosis of the X acceleration series
q1X	first quartile of the X acceleration series
medianX	median of the X acceleration series
q3X	third quartile of the X acceleration series
iqrX	interquartile range of the X acceleration series
rangeX	range of the X acceleration series
acfX	autocorrelation (lag = 1) of the X acceleration series
zcrX	zero-crossing rate of the X acceleration series
dfaX	scaling exponent of the detrended fluctuation analysis of the X acceleration series
cvX	coefficient of variation of the X acceleration series
tkeoX	teager-kaiser energy operator of the X acceleration series
F0X	frequency at which the maximum peak of the Lomb-Scargle periodogram occurred for the X acceleration series
P0X	maximum power in the inspected frequency interval of the Lomb-Scargle periodogram for the X acceleration series
meanY	mean of the Y acceleration series
sdY	standard deviation of the Y acceleration series
modeY	mode of the Y acceleration series
skewY	skewness of the Y acceleration series
kurY	kurtosis of the Y acceleration series
q1Y	first quartile of the Y acceleration series
medianY	median of the Y acceleration series
q3Y	third quartile of the Y acceleration series
iqrY	interquartile range of the Y acceleration series
rangeY	range of the Y acceleration series
acfY	autocorrelation (lag = 1) of the Y acceleration series
zcrY	zero-crossing rate of the Y acceleration series
dfaY	scaling exponent of the detrended fluctuation analysis of the Y acceleration series
cvY	coefficient of variation of the Y acceleration series
tkeoY	teager-kaiser energy operator of the Y acceleration series
F0Y	frequency at which the maximum peak of the Lomb-Scargle periodogram occurred for the Y acceleration series
P0Y	maximum power in the inspected frequency interval of the Lomb-Scargle periodogram for the Y acceleration series
meanZ	mean of the Z acceleration series
sdZ	standard deviation of the Z acceleration series
modeZ	mode of the Z acceleration series
skewZ	skewness of the Z acceleration series
kurZ	kurtosis of the Z acceleration series
q1Z	first quartile of the Z acceleration series
medianZ	median of the Z acceleration series
q3Z	third quartile of the Z acceleration series
iqrZ	interquartile range of the Z acceleration series
rangeZ	range of the Z acceleration series
acfZ	autocorrelation (lag = 1) of the Z acceleration series
zcrZ	zero-crossing rate of the Z acceleration series
dfaZ	scaling exponent of the detrended fluctuation analysis of the Z acceleration series
cvZ	coefficient of variation of the Z acceleration series
tkeoZ	teager-kaiser energy operator of the Z acceleration series
F0Z	frequency at which the maximum peak of the Lomb-Scargle periodogram occurred for the Z acceleration series
P0Z	maximum power in the inspected frequency interval of the Lomb-Scargle periodogram for the Z acceleration series
meanAA	mean of the average acceleration series
sdAA	standard deviation of the average acceleration series
modeAA	mode of the average acceleration series
skewAA	skewness of the average acceleration series
kurAA	kurtosis of the average acceleration series
q1AA	first quartile of the average acceleration series
medianAA	median of the average acceleration series
q3AA	third quartile of the average acceleration series
iqrAA	interquartile range of the average acceleration series
rangeAA	range of the average acceleration series
acfAA	autocorrelation (lag = 1) of the average acceleration series
zcrAA	zero-crossing rate of the average acceleration series
dfaAA	scaling exponent of the detrended fluctuation analysis of the average acceleration Series
cvAA	coefficient of variation of the average acceleration series
tkeoAA	teager-kaiser energy operator of the average acceleration series
F0AA	frequency at which the maximum peak of the Lomb-Scargle periodogram occured for the average acceleration series
P0AA	maximum power in the inspected frequency interval of the Lomb-Scargle periodogram for the average acceleration series
meanAJ	mean of the average jerk series
sdAJ	standard deviation of the average jerk series
modeAJ	mode of the average jerk series
skewAJ	skewness of the average jerk series
kurAJ	kurtosis of the average jerk series
q1AJ	first quartile of the average jerk series
medianAJ	median of the average jerk series
q3AJ	third quartile of the average jerk series
iqrAJ	interquartile range of the average jerk series
rangeAJ	range of the average jerk series
acfAJ	autocorrelation (lag = 1) of the average jerk series
zcrAJ	zero-crossing rate of the average jerk series
dfaAJ	scaling exponent of the detrended fluctuation analysis of the average jerk series
cvAJ	coefficient of variation of the average jerk series
tkeoAJ	teager-kaiser energy operator of the average jerk series
F0AJ	frequency at which the maximum peak of the Lomb-Scargle periodogram occurred for the average jerk series
P0AJ	maximum power in the inspected frequency interval of the Lomb-Scargle periodogram for the average jerk series
corXY	correlation between the X and Y acceleration
corXZ	correlation between the X and Z acceleration
corYZ	correlation between the Y and Z acceleration

Rest

Feature Name	Definition
meanAA	mean of the average acceleration series
sdAA	standard deviation of the average acceleration series
modeAA	mode of the average acceleration series
skewAA	skewness of the average acceleration series
kurAA	kurtosis of the average acceleration series
q1AA	first quartile of the average acceleration series
medianAA	median of the average acceleration series
q3AA	third quartile of the average acceleration series
iqrAA	interquartile range of the average acceleration series
rangeAA	range of the average acceleration series
acfAA	autocorrelation (lag = 1) of the average acceleration series
zcrAA	zero-crossing rate of the average acceleration series
dfaAA	scaling exponent of the detrended fluctuation analysis of the average acceleration series
turningTime	turning time
Postpeak	posture peak
Postpower	posture power
Alpha	scaling exponent of the detrended fluctuation analysis of the force vector magnitute series
dVol	displacement volume (volume of the box around the displacement across the X, Y, and Z directions)
ddVol	delta displacement volume