Data Dictionary - Tidy.txt
subjectId
Integer value representing the id of the subject that was measured
activityName
Name of the activity performed by the subject
- WALKING
- WALKING_UPSTAIRS
- WALKING_DOWNSTAIRS
- SITTING
- STANDING
- LAYING
domain
The type of domain signal used for the measurement
- Time
- Frequency
instrument
Instrument used to measure the subject
- Gyroscope
- Accelerometer
acceleration
The type of acceleration used when the subject was measured by an Accelerometer. NA reported for any reading not from an Accelerometer.
- Body
- Gravity
isJerk
Flag field indicating if this was a Jerk signal or not
isMagnitude
Flag field indicating if this value was calculated using the magnitude.
variable
The variable that was measured for this observation
- Mean
- StandardDeviation
axis
The axis that was measured
- X
- Y
- Z