run_analysis.R

R script for course project that does the following:
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.