#Getting and Cleaning Data Course CodeBook
This codebook provide description for varibales from result.txt. Description for original data coulb be find in 'UCI HAR Dataset' directory.
activity
persons activity
Measurement: nominal
Values:
'LAYING'
'SITTING'
'STANDING'
'WALKING'
'WALKING_DOWNSTAIRS'
'WALKING_UPSTAIRS'
subject
an identifier of the subject who carried out the experiment
Measurement: number
Values: 1 ... 30
#Average values
All measurement are averages value which grouped by subject and activity
Following are descriptions of averages.
##Commons
Acc - accelerometer signals.
The acceleration signal was separated into Body and Gravity acceleration signals
Gyro - gyroscope signals.
Jerk - the body linear acceleration and angular velocity derived in time.
Mean - mean value (it's mean, that original value already represent average value for measurement. Not to be confused with average by subject and activity).
StDev - Standard deviation.
All signals are 3-axial. Last literal in variable name denotes axis.
Mag -magnitude of three-dimensional signals
All variables are normalized and bounded within [-1,1].
Storage mode: double
Measurement: intervale
##Average by subject and activity for time domain signals
meanTimeBodyAccMeanX
meanTimeBodyAccMeanY
meanTimeBodyAccMeanZ
meanTimeBodyAccStDevX
meanTimeBodyAccStDevY
meanTimeBodyAccStDevZ
meanTimeGravityAccMeanX
meanTimeGravityAccMeanY
meanTimeGravityAccMeanZ
meanTimeGravityAccStDevX
meanTimeGravityAccStDevY
meanTimeGravityAccStDevZ
meanTimeBodyAccJerkMeanX
meanTimeBodyAccJerkMeanY
meanTimeBodyAccJerkMeanZ
meanTimeBodyAccJerkStDevX
meanTimeBodyAccJerkStDevY
meanTimeBodyAccJerkStDevZ
meanTimeBodyGyroMeanX
meanTimeBodyGyroMeanY
meanTimeBodyGyroMeanZ
meanTimeBodyGyroStDevX
meanTimeBodyGyroStDevY
meanTimeBodyGyroStDevZ
meanTimeBodyGyroJerkMeanX
meanTimeBodyGyroJerkMeanY
meanTimeBodyGyroJerkMeanZ
meanTimeBodyGyroJerkStDevX
meanTimeBodyGyroJerkStDevY
meanTimeBodyGyroJerkStDevZ
meanTimeBodyAccMagMean
meanTimeBodyAccMagStDev
meanTimeGravityAccMagMean
meanTimeGravityAccMagStDev
meanTimeBodyAccJerkMagMean
meanTimeBodyAccJerkMagStDev
meanTimeBodyGyroMagMean
meanTimeBodyGyroMagStDev
meanTimeBodyGyroJerkMagMean
meanTimeBodyGyroJerkMagStDev
##Average by subject and activity for frequency domain signals
meanFrequencyBodyAccMeanX
meanFrequencyBodyAccMeanY
meanFrequencyBodyAccMeanZ
meanFrequencyBodyAccStDevX
meanFrequencyBodyAccStDevY
meanFrequencyBodyAccStDevZ
meanFrequencyBodyAccJerkMeanX
meanFrequencyBodyAccJerkMeanY
meanFrequencyBodyAccJerkMeanZ
meanFrequencyBodyAccJerkStDevX
meanFrequencyBodyAccJerkStDevY
meanFrequencyBodyAccJerkStDevZ
meanFrequencyBodyGyroMeanX
meanFrequencyBodyGyroMeanY
meanFrequencyBodyGyroMeanZ
meanFrequencyBodyGyroStDevX
meanFrequencyBodyGyroStDevY
meanFrequencyBodyGyroStDevZ
meanFrequencyBodyAccMagMean
meanFrequencyBodyAccMagStDev
meanFrequencyBodyBodyAccJerkMagMean
meanFrequencyBodyBodyAccJerkMagStDev
meanFrequencyBodyBodyGyroMagMean
meanFrequencyBodyBodyGyroMagStDev
meanFrequencyBodyBodyGyroJerkMagMean
meanFrequencyBodyBodyGyroJerkMagStDev