Skip to content

Latest commit

 

History

History
67 lines (58 loc) · 4.02 KB

CodeBook.md

File metadata and controls

67 lines (58 loc) · 4.02 KB
Raw

Dimensions

Subject

The unique identifier of the subject, from 1 to 30

Activity

The name of the activity the subject was doing during the measurements.

The different activities are:

  • WALKING
  • WALKING_UPSTAIRS
  • WALKING_DOWNSTAIRS
  • SITTING
  • STANDING
  • LAYING

Measurements

All measurements are normalized and bounded within [-1, 1], and are thus unitless.

Gravity Acceleration

The following measures correspond to the acceleration signal of gravity.

  • tGravityAcc-mean()-X, tGravityAcc-mean()-Y, tGravityAcc-mean()-Z: The mean in the 3 directions (X, Y, Z).
  • tGravityAcc-std()-X, tGravityAcc-std()-Y, tGravityAcc-std()-Z: The standard deviation in the 3 directions (X, Y, Z).
  • tGravityAccMag-mean(): The mean of the magnitude.
  • tGravityAccMag-std(): The standard deviation of the magnitude.

Body Acceleration

The following measures correspond to the acceleration signal of the body.

  • tBodyAcc-mean()-X, tBodyAcc-mean()-Y, tBodyAcc-mean()-Z: The mean in the 3 directions (X, Y, Z).
  • tBodyAcc-std()-X, tBodyAcc-std()-Y, tBodyAcc-std()-Z: The standard deviation in the 3 directions (X, Y, Z).
  • tBodyAccMag-mean(): The mean of the magnitude.
  • tBodyAccMag-std(): The standard deviation of the magnitude.
  • fBodyAcc-mean()-X, fBodyAcc-mean()-Y, fBodyAcc-mean()-Z: The mean of the Fast Fourier Transform (FFT), in the 3 directions (X, Y, Z).
  • fBodyAcc-std()-X, fBodyAcc-std()-Y, fBodyAcc-std()-Z: The standard deviation of the FFT, in the 3 directions (X, Y, Z).
  • fBodyAccMag-mean(): The mean of the FFT of the magnitude.
  • fBodyAccMag-std(): The standard deviation of the FFT of the magnitude.

Body Acceleration Jerk

The following measures correspond to the time derivative of the acceleration signal of the body.

  • tBodyAccJerk-mean()-X, tBodyAccJerk-mean()-Y, tBodyAccJerk-mean()-Z: The mean in the 3 directions (X, Y, Z).
  • tBodyAccJerk-std()-X, tBodyAccJerk-std()-Y, tBodyAccJerk-std()-Z: The standard deviation in the 3 directions (X, Y, Z).
  • tBodyAccJerkMag-mean(): The mean of the magnitude.
  • tBodyAccJerkMag-std(): The standard deviation of the magnitude.
  • fBodyAccJerk-mean()-X, fBodyAccJerk-mean()-Y, fBodyAccJerk-mean()-Z: The mean of the Fast Fourier Transform (FFT), in the 3 directions (X, Y, Z).
  • fBodyAccJerk-std()-X, fBodyAccJerk-std()-Y, fBodyAccJerk-std()-Z: The standard deviation of the FFT, in the 3 directions (X, Y, Z).
  • fBodyAccJerkMag-mean(): The mean of the FFT of the magnitude.
  • fBodyAccJerkMag-std(): The standard deviation of the FFT of the magnitude.

Body Angular Velocity

The following measures correspond to the angular velocity signal of the body.

  • tBodyGyro-mean()-X, tBodyGyro-mean()-Y, tBodyGyro-mean()-Z: The mean in the 3 directions (X, Y, Z).
  • tBodyGyro-std()-X, tBodyGyro-std()-Y, tBodyGyro-std()-Z: The standard deviation in the 3 directions (X, Y, Z).
  • tBodyGyroMag-mean(): The mean of the magnitude.
  • tBodyGyroMag-std(): The standard deviation of the magnitude.
  • fBodyGyro-mean()-X, fBodyGyro-mean()-Y, fBodyGyro-mean()-Z: The mean of the Fast Fourier Transform (FFT), in the 3 directions (X, Y, Z).
  • fBodyGyro-std()-X, fBodyGyro-std()-Y, fBodyGyro-std()-Z: The standard deviation of the FFT, in the 3 directions (X, Y, Z).
  • fBodyGyroMag-mean(): The mean of the FFT of the magnitude.
  • fBodyGyroMag-std(): The standard deviation of the FFT of the magnitude.

Body Angular Velocity Jerk

The following measures correspond to the time derivative of the angular velocity signal of the body.

  • tBodyGyroJerk-mean()-X, tBodyGyroJerk-mean()-Y, tBodyGyroJerk-mean()-Z: The mean in the 3 directions (X, Y, Z).
  • tBodyGyroJerk-std()-X, tBodyGyroJerk-std()-Y, tBodyGyroJerk-std()-Z: The standard deviation in the 3 directions (X, Y, Z).
  • tBodyGyroJerkMag-mean(): The mean of the magnitude.
  • tBodyGyroJerkMag-std(): The standard deviation of the magnitude.
  • fBodyGyroJerkMag-mean(): The mean of the FFT of the magnitude.
  • fBodyGyroJerkMag-std(): The standard deviation of the FFT of the magnitude.