Simply run the command source("run_analysis.R") in the interactive command line of R, then it will automatically download the data and produce two files, i.e. mergeddata.txt and tidyavg.txt. The file mergeddata.txt is produced by merging the original training set and testing data, while tidyavg.txt is the file that contains the average of each variable for each activity and each subject.

For further information, please refer to run_analysis.R and CodeBook.md.

These features are considered to be measurements on the mean and standard deviation in this work:

• 1 tBodyAcc-mean()-X
• 2 tBodyAcc-mean()-Y
• 3 tBodyAcc-mean()-Z
• 4 tBodyAcc-std()-X
• 5 tBodyAcc-std()-Y
• 6 tBodyAcc-std()-Z
• 41 tGravityAcc-mean()-X
• 42 tGravityAcc-mean()-Y
• 43 tGravityAcc-mean()-Z
• 44 tGravityAcc-std()-X
• 45 tGravityAcc-std()-Y
• 46 tGravityAcc-std()-Z
• 81 tBodyAccJerk-mean()-X
• 82 tBodyAccJerk-mean()-Y
• 83 tBodyAccJerk-mean()-Z
• 84 tBodyAccJerk-std()-X
• 85 tBodyAccJerk-std()-Y
• 86 tBodyAccJerk-std()-Z
• 121 tBodyGyro-mean()-X
• 122 tBodyGyro-mean()-Y
• 123 tBodyGyro-mean()-Z
• 124 tBodyGyro-std()-X
• 125 tBodyGyro-std()-Y
• 126 tBodyGyro-std()-Z
• 161 tBodyGyroJerk-mean()-X
• 162 tBodyGyroJerk-mean()-Y
• 163 tBodyGyroJerk-mean()-Z
• 164 tBodyGyroJerk-std()-X
• 165 tBodyGyroJerk-std()-Y
• 166 tBodyGyroJerk-std()-Z
• 201 tBodyAccMag-mean()
• 202 tBodyAccMag-std()
• 214 tGravityAccMag-mean()
• 215 tGravityAccMag-std()
• 227 tBodyAccJerkMag-mean()
• 228 tBodyAccJerkMag-std()
• 240 tBodyGyroMag-mean()
• 241 tBodyGyroMag-std()
• 253 tBodyGyroJerkMag-mean()
• 254 tBodyGyroJerkMag-std()
• 266 fBodyAcc-mean()-X
• 267 fBodyAcc-mean()-Y
• 268 fBodyAcc-mean()-Z
• 269 fBodyAcc-std()-X
• 270 fBodyAcc-std()-Y
• 271 fBodyAcc-std()-Z
• 345 fBodyAccJerk-mean()-X
• 346 fBodyAccJerk-mean()-Y
• 347 fBodyAccJerk-mean()-Z
• 348 fBodyAccJerk-std()-X
• 349 fBodyAccJerk-std()-Y
• 350 fBodyAccJerk-std()-Z
• 424 fBodyGyro-mean()-X
• 425 fBodyGyro-mean()-Y
• 426 fBodyGyro-mean()-Z
• 427 fBodyGyro-std()-X
• 428 fBodyGyro-std()-Y
• 429 fBodyGyro-std()-Z
• 503 fBodyAccMag-mean()
• 504 fBodyAccMag-std()
• 516 fBodyBodyAccJerkMag-mean()
• 517 fBodyBodyAccJerkMag-std()
• 529 fBodyBodyGyroMag-mean()
• 530 fBodyBodyGyroMag-std()
• 542 fBodyBodyGyroJerkMag-mean()
• 543 fBodyBodyGyroJerkMag-std()

• 1 WALKING
• 2 WALKING_UPSTAIRS
• 3 WALKING_DOWNSTAIRS
• 4 SITTING
• 5 STANDING
• 6 LAYING