This code book describe the fields of the output dataset in tidy_dataset.txt.
subject- It denotes the subject number that performed an activity. It has 30 subjects in total.activity- It denotes the activity performed by the subject. There are 6 activities listed below:- WALKING
- WALKING_UPSTAIRS
- WALKING_DOWNSTAIRS
- SITTING
- STANDING
- LAYING
There are 66 feature variables with its means grouped by subject and activitiy, calcultated from original dataset as below:
- 'timeBodyAccelerometerMeanX'
- 'timeBodyAccelerometerMeanY'
- 'timeBodyAccelerometerMeanZ'
- 'timeBodyAccelerometerStdX'
- 'timeBodyAccelerometerStdY'
- 'timeBodyAccelerometerStdZ'
- 'timeGravityAccelerometerMeanX'
- 'timeGravityAccelerometerMeanY'
- 'timeGravityAccelerometerMeanZ'
- 'timeGravityAccelerometerStdX'
- 'timeGravityAccelerometerStdY'
- 'timeGravityAccelerometerStdZ'
- 'timeBodyAccelerometerJerkMeanX'
- 'timeBodyAccelerometerJerkMeanY'
- 'timeBodyAccelerometerJerkMeanZ'
- 'timeBodyAccelerometerJerkStdX'
- 'timeBodyAccelerometerJerkStdY'
- 'timeBodyAccelerometerJerkStdZ'
- 'timeBodyGyroscopeMeanX'
- 'timeBodyGyroscopeMeanY'
- 'timeBodyGyroscopeMeanZ'
- 'timeBodyGyroscopeStdX'
- 'timeBodyGyroscopeStdY'
- 'timeBodyGyroscopeStdZ'
- 'timeBodyGyroscopeJerkMeanX'
- 'timeBodyGyroscopeJerkMeanY'
- 'timeBodyGyroscopeJerkMeanZ'
- 'timeBodyGyroscopeJerkStdX'
- 'timeBodyGyroscopeJerkStdY'
- 'timeBodyGyroscopeJerkStdZ'
- 'timeBodyAccelerometerMagnitudeMean'
- 'timeBodyAccelerometerMagnitudeStd'
- 'timeGravityAccelerometerMagnitudeMean'
- 'timeGravityAccelerometerMagnitudeStd'
- 'timeBodyAccelerometerJerkMagnitudeMean'
- 'timeBodyAccelerometerJerkMagnitudeStd'
- 'timeBodyGyroscopeMagnitudeMean'
- 'timeBodyGyroscopeMagnitudeStd'
- 'timeBodyGyroscopeJerkMagnitudeMean'
- 'timeBodyGyroscopeJerkMagnitudeStd'
- 'frequencyBodyAccelerometerMeanX'
- 'frequencyBodyAccelerometerMeanY'
- 'frequencyBodyAccelerometerMeanZ'
- 'frequencyBodyAccelerometerStdX'
- 'frequencyBodyAccelerometerStdY'
- 'frequencyBodyAccelerometerStdZ'
- 'frequencyBodyAccelerometerJerkMeanX'
- 'frequencyBodyAccelerometerJerkMeanY'
- 'frequencyBodyAccelerometerJerkMeanZ'
- 'frequencyBodyAccelerometerJerkStdX'
- 'frequencyBodyAccelerometerJerkStdY'
- 'frequencyBodyAccelerometerJerkStdZ'
- 'frequencyBodyGyroscopeMeanX'
- 'frequencyBodyGyroscopeMeanY'
- 'frequencyBodyGyroscopeMeanZ'
- 'frequencyBodyGyroscopeStdX'
- 'frequencyBodyGyroscopeStdY'
- 'frequencyBodyGyroscopeStdZ'
- 'frequencyBodyAccelerometerMagnitudeMean'
- 'frequencyBodyAccelerometerMagnitudeStd'
- 'frequencyBodyAccelerometerJerkMagnitudeMean'
- 'frequencyBodyAccelerometerJerkMagnitudeStd'
- 'frequencyBodyGyroscopeMagnitudeMean'
- 'frequencyBodyGyroscopeMagnitudeStd'
- 'frequencyBodyGyroscopeJerkMagnitudeMean'
- 'frequencyBodyGyroscopeJerkMagnitudeStd'