tidy_data.txt is the tidy data set according to the instructions in the project description. This data set including 66 columns of mean and standard deviation measurements, 180 rows of the average of each variable for each activity and each subject.

run_analysis.R can be run as long as the data set 'UCI HAR Dataset' in the same directory. The output of this script is tidy_data.txt.

###This script includes five parts: Uses descriptive activity names to name the activities in the data set. merges the training and the test sets. Extracts only the measurements on the mean and standard deviation for each measurement. Appropriately labels the data set with descriptive activity names. Creates a second, independent tidy data set with the average of each variable for each activity and each subject.