TwoRegression           Process Data from Wearable Research Devices
                        Using Two-Regression Algorithms
all_data                Two-regression-ready data frame
get_cvPER               Calculate coefficient of variation in sliding
                        windows
get_directions          Calculate direction changes per five seconds in
                        sliding windows
hibbing18_twoReg_process
                        Process GT9X Files with Hibbing Two-Regression
                        Algorithms
imu_to_check            IMU data to check
imu_to_collapse         IMU data to collapse
raw_for_cv              Primary accelerometer data to calculate
                        coefficient of variation per 10-s
raw_to_collapse         Primary accelerometer data to collapse
read_AG_raw             File reading function for primary accelerometer
                        files
read_IMU                File reading function for IMU files
