Initial commit of run_analysis.R. Extracts mean and standard deviation measurements, includes activity labels and descriptive names for columns.
Create tidy data set
Make it more tidier. Transpose so all data are in columns. Put activity and subject in separate columns instead of row names. Make all headers lower case and eliminate periods.
Only use actual mean() and std() data, not others that happen to have mean in name (i.e. meanFreq() or angle(mean)).
Write as tab separated .txt file instead of .csv.
Fix already_loaded so it works even if variable doesn't exist.