This code book summarizes the resulting data fields in tidy.txt.
subject- The ID of the test subjectactivity- The type of activity performed when the corresponding measurements were taken
t stand for timef stands for frequency
tBodyAccMeanXtBodyAccMeanYtBodyAccMeanZtBodyAccStdXtBodyAccStdYtBodyAccStdZtGravityAccMeanXtGravityAccMeanYtGravityAccMeanZtGravityAccStdXtGravityAccStdYtGravityAccStdZtBodyAccJerkMeanXtBodyAccJerkMeanYtBodyAccJerkMeanZtBodyAccJerkStdXtBodyAccJerkStdYtBodyAccJerkStdZtBodyGyroMeanXtBodyGyroMeanYtBodyGyroMeanZtBodyGyroStdXtBodyGyroStdYtBodyGyroStdZtBodyGyroJerkMeanXtBodyGyroJerkMeanYtBodyGyroJerkMeanZtBodyGyroJerkStdXtBodyGyroJerkStdYtBodyGyroJerkStdZtBodyAccMagMeantBodyAccMagStdtGravityAccMagMeantGravityAccMagStdtBodyAccJerkMagMeantBodyAccJerkMagStdtBodyGyroMagMeantBodyGyroMagStdtBodyGyroJerkMagMeantBodyGyroJerkMagStdfBodyAccMeanXfBodyAccMeanYfBodyAccMeanZfBodyAccStdXfBodyAccStdYfBodyAccStdZfBodyAccMeanFreqXfBodyAccMeanFreqYfBodyAccMeanFreqZfBodyAccJerkMeanXfBodyAccJerkMeanYfBodyAccJerkMeanZfBodyAccJerkStdXfBodyAccJerkStdYfBodyAccJerkStdZfBodyAccJerkMeanFreqXfBodyAccJerkMeanFreqYfBodyAccJerkMeanFreqZfBodyGyroMeanXfBodyGyroMeanYfBodyGyroMeanZfBodyGyroStdXfBodyGyroStdYfBodyGyroStdZfBodyGyroMeanFreqXfBodyGyroMeanFreqYfBodyGyroMeanFreqZfBodyAccMagMeanfBodyAccMagStdfBodyAccMagMeanFreqfBodyBodyAccJerkMagMeanfBodyBodyAccJerkMagStdfBodyBodyAccJerkMagMeanFreqfBodyBodyGyroMagMeanfBodyBodyGyroMagStdfBodyBodyGyroMagMeanFreqfBodyBodyGyroJerkMagMeanfBodyBodyGyroJerkMagStdfBodyBodyGyroJerkMagMeanFreq
WALKING(value1): subject was walking during the testWALKING_UPSTAIRS(value2): subject was walking up a staircase during the testWALKING_DOWNSTAIRS(value3): subject was walking down a staircase during the testSITTING(value4): subject was sitting during the testSTANDING(value5): subject was standing during the testLAYING(value6): subject was laying down during the test
Activity variable is factor type. Subject variable is integer type. All the other variables are numeric type