Companies like Fitbit, Nike, and Jawbone Up are racing to develop the most advanced algorithms to attract new users. The data used here was collected from the accelerometers from the Samsung Galaxy S smartphone.
activity: Participants were assessed during 6 different activities--sitting, standing, laying, walking, walking up stairs, and walking downstairs.
subjectID: Each subject was assigned a number between 1 and 30.
averages of means and standard deviations: each subject had multiple mean and standard deviation measurements for the following signals that were extracted from the original data. Data was furthered summarized to create the average mean and standard deviation for each activity for each subject for all signals.
- tBodyAcc-XYZ
- tGravityAcc-XYZ
- tBodyAccJerk-XYZ
- tBodyGyro-XYZ
- tBodyGyroJerk-XYZ
- tBodyAccMag
- tGravityAccMag
- tBodyAccJerkMag
- tBodyGyroMag
- tBodyGyroJerkMag
- fBodyAcc-XYZ
- fBodyAccJerk-XYZ
- fBodyGyro-XYZ
- fBodyAccMag
- fBodyAccJerkMag
- fBodyGyroMag
- fBodyGyroJerkMag