This is the course project of Getting and Cleaning Data Course.Code is uploaded as run_analysis.R to meet above five requirements:
1.Merges the training and the test sets to create one data set.
2.Extracts only the measurements on the mean and standard deviation for each measurement.
3.Uses descriptive activity names to name the activities in the data set.
4.Appropriately labels the data set with descriptive variable names.
5.From the data set in step 4, creates a second, independent tidy data set with the average of each variable for each activity and each subject.
A code book that describes the variables, the data, and any transformations or work that I performed to clean up the data is in CodeBook.md.