This code book summarizes the resulting data fields in tidy.txt . subject_ID ranges from 1 to 30, while "acitivity" is comprised of "laying","sitting","standing","walking","walking upstairs", "walking downstair"
"subject_ID"
"activity"
the following 3 axial variables should be self-explanatory. There are 79 variables in total. std=standard deviation
"time_BodyAcc_mean()_X"
"time_BodyAcc_mean()_Y"
"time_BodyAcc_mean()_Z"
"time_BodyAcc_std()_X"
"time_BodyAcc_std()_Y"
"time_BodyAcc_std()_Z"
"time_GravityAcc_mean()_X"
"time_GravityAcc_mean()_Y"
"time_GravityAcc_mean()_Z"
"time_GravityAcc_std()_X"
"time_GravityAcc_std()_Y"
"time_GravityAcc_std()_Z"
"time_BodyAccJerk_mean()_X"
"time_BodyAccJerk_mean()_Y"
"time_BodyAccJerk_mean()_Z"
"time_BodyAccJerk_std()_X"
"time_BodyAccJerk_std()_Y"
"time_BodyAccJerk_std()_Z"
"time_BodyGyro_mean()_X"
"time_BodyGyro_mean()_Y"
"time_BodyGyro_mean()_Z"
"time_BodyGyro_std()_X"
"time_BodyGyro_std()_Y"
"time_BodyGyro_std()_Z"
"time_BodyGyroJerk_mean()_X"
"time_BodyGyroJerk_mean()_Y"
"time_BodyGyroJerk_mean()_Z"
"time_BodyGyroJerk_std()_X"
"time_BodyGyroJerk_std()_Y"
"time_BodyGyroJerk_std()_Z"
"time_BodyAcc_magnitude_mean()"
"time_BodyAcc_magnitude_std()"
"time_GravityAcc_magnitude_mean()"
"time_GravityAcc_magnitude_std()"
"time_BodyAccJerk_magnitude_mean()"
"time_BodyAccJerk_magnitude_std()"
"time_BodyGyro_magnitude_mean()"
"time_BodyGyro_magnitude_std()"
"time_BodyGyroJerk_magnitude_mean()"
"time_BodyGyroJerk_magnitude_std()"
"freq_BodyAcc_mean()_X"
"freq_BodyAcc_mean()_Y"
"freq_BodyAcc_mean()_Z"
"freq_BodyAcc_std()_X"
"freq_BodyAcc_std()_Y"
"freq_BodyAcc_std()_Z"
"freq_BodyAcc_meanFreq()_X"
"freq_BodyAcc_meanFreq()_Y"
"freq_BodyAcc_meanFreq()_Z"
"freq_BodyAccJerk_mean()_X"
"freq_BodyAccJerk_mean()_Y"
"freq_BodyAccJerk_mean()_Z"
"freq_BodyAccJerk_std()_X"
"freq_BodyAccJerk_std()_Y"
"freq_BodyAccJerk_std()_Z"
"freq_BodyAccJerk_meanFreq()_X"
"freq_BodyAccJerk_meanFreq()_Y"
"freq_BodyAccJerk_meanFreq()_Z"
"freq_BodyGyro_mean()_X"
"freq_BodyGyro_mean()_Y"
"freq_BodyGyro_mean()_Z"
"freq_BodyGyro_std()_X"
"freq_BodyGyro_std()_Y"
"freq_BodyGyro_std()_Z"
"freq_BodyGyro_meanFreq()_X"
"freq_BodyGyro_meanFreq()_Y"
"freq_BodyGyro_meanFreq()_Z"
"freq_BodyAcc_magnitude_mean()"
"freq_BodyAcc_magnitude_std()"
"freq_BodyAcc_magnitude_meanFreq()"
"freq_BodyBodyAccJerk_magnitude_mean()"
"freq_BodyBodyAccJerk_magnitude_std()"
"freq_BodyBodyAccJerk_magnitude_meanFreq()"
"freq_BodyBodyGyro_magnitude_mean()"
"freq_BodyBodyGyro_magnitude_std()"
"freq_BodyBodyGyro_magnitude_meanFreq()"
"freq_BodyBodyGyroJerk_magnitude_mean()"
"freq_BodyBodyGyroJerk_magnitude_std()"
"freq_BodyBodyGyroJerk_magnitude_meanFreq()"