FeatureDefinitions.md
In Sage-Bionetworks/mpowertools: mPowerTools - Modules for processing data from mPower apps
title: "Feature Definitions"
author: "Thanneer Malai Perumal"
date: "Mon Jun 26 17:46:41 2017"
output: 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 |
| F0FX | frequency at which the maximum peak of the Lomb-Scargle periodogram occurred for the X acceleration series, with frequencies limited to (0.2,5) Hz |
| P0FX | maximum power in the inspected frequency interval of the Lomb-Scargle periodogram for the X acceleration, with frequencies limited to (0.2,5) Hz 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 |
| F0FY | frequency at which the maximum peak of the Lomb-Scargle periodogram occurred for the Y acceleration series, with frequencies limited to (0.2,5) Hz |
| P0FY | maximum power in the inspected frequency interval of the Lomb-Scargle periodogram for the Y acceleration, with frequencies limited to (0.2,5) Hz 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 |
| F0FZ | frequency at which the maximum peak of the Lomb-Scargle periodogram occurred for the Z acceleration series, with frequencies limited to (0.2,5) Hz |
| P0FZ | maximum power in the inspected frequency interval of the Lomb-Scargle periodogram for the Z acceleration, with frequencies limited to (0.2,5) Hz 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 |
| F0FAA | frequency at which the maximum peak of the Lomb-Scargle periodogram occurred for the AA acceleration series, with frequencies limited to (0.2,5) Hz |
| P0FAA | maximum power in the inspected frequency interval of the Lomb-Scargle periodogram for the AA acceleration, with frequencies limited to (0.2,5) Hz 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 |
| F0FAJ | frequency at which the maximum peak of the Lomb-Scargle periodogram occurred for the AA acceleration series, with frequencies limited to (0.2,5) Hz |
| P0FAJ | maximum power in the inspected frequency interval of the Lomb-Scargle periodogram for the AJ acceleration, with frequencies limited to (0.2,5) Hz 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 |
Where,
AA = sqrt(X^2 + Y^2 + Z^2)
AJ = sqrt((diff(X))^2 + (diff(Y))^2 + (diff(Z))^2)
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 |
Sage-Bionetworks/mpowertools documentation built on Feb. 14, 2020, 5:54 p.m.
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title: "Feature Definitions" author: "Thanneer Malai Perumal" date: "Mon Jun 26 17:46:41 2017" output: 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 | | F0FX | frequency at which the maximum peak of the Lomb-Scargle periodogram occurred for the X acceleration series, with frequencies limited to (0.2,5) Hz | | P0FX | maximum power in the inspected frequency interval of the Lomb-Scargle periodogram for the X acceleration, with frequencies limited to (0.2,5) Hz 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 | | F0FY | frequency at which the maximum peak of the Lomb-Scargle periodogram occurred for the Y acceleration series, with frequencies limited to (0.2,5) Hz | | P0FY | maximum power in the inspected frequency interval of the Lomb-Scargle periodogram for the Y acceleration, with frequencies limited to (0.2,5) Hz 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 | | F0FZ | frequency at which the maximum peak of the Lomb-Scargle periodogram occurred for the Z acceleration series, with frequencies limited to (0.2,5) Hz | | P0FZ | maximum power in the inspected frequency interval of the Lomb-Scargle periodogram for the Z acceleration, with frequencies limited to (0.2,5) Hz 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 | | F0FAA | frequency at which the maximum peak of the Lomb-Scargle periodogram occurred for the AA acceleration series, with frequencies limited to (0.2,5) Hz | | P0FAA | maximum power in the inspected frequency interval of the Lomb-Scargle periodogram for the AA acceleration, with frequencies limited to (0.2,5) Hz 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 | | F0FAJ | frequency at which the maximum peak of the Lomb-Scargle periodogram occurred for the AA acceleration series, with frequencies limited to (0.2,5) Hz | | P0FAJ | maximum power in the inspected frequency interval of the Lomb-Scargle periodogram for the AJ acceleration, with frequencies limited to (0.2,5) Hz 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 |
Where,
AA = sqrt(X^2 + Y^2 + Z^2)
AJ = sqrt((diff(X))^2 + (diff(Y))^2 + (diff(Z))^2)
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 |
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