This is the final project for the Getting and Cleaning Data class on Coursera (link).
The file run_analysis.R is a stand-alone R script which parses the data from the UCI HAR Dataset, merges the training and test data, transforms it, cleans it, and outputs a summary dataset of the means of "mean" and "std" measurements. The script is commented to clarify each step in this process.
The resulting output file mean_dataset.txt is 285 Kb (not included in the repository). The script takes about 15 seconds to complete.
There is a code book to interpret the output.