Getting and cleaning data exercise
tBodyAcc-XYZ - Estimated triaxial acceleration for the body acceleration. tGravityAcc-XYZ - Triaxial gravity acceleration tBodyAccJerk-XYZ - Change of the acceleration for the body tBodyGyro-XYZ - Triaxial Angular velocity from the gyroscope. tBodyGyroJerk-XYZ - Triaxial change of Angular velocity from the gyroscope. tBodyAccMag - Scalar magnitude of acceleration for the body tGravityAccMag - tBodyAccJerkMag tBodyGyroMag tBodyGyroJerkMag fBodyAcc-XYZ fBodyAccJerk-XYZ fBodyGyro-XYZ fBodyAccMag fBodyAccJerkMag fBodyGyroMag fBodyGyroJerkMag
-
'README.txt', this file
-
'y_train_plus_test.txt': Shows averages for the variables of the exercise per subject and type of activity
-
'run_analysis.R" Performs the operations to:
- Merge the training and the test sets to create one data set.
- Extract only the measurements on the mean and standard deviation for each measurement.
- Use descriptive activity names (from activity labels) to name the activities in the data set
- Appropriately label the data set with descriptive variable names.
- Create a second, independent tidy data set with the average of each variable for each activity and each subject., the former file "y_train_plus_test.txt"
- Library gdata: write.fwf to write with a fixed width field format