accel                   Return accelerations
append_displacement     Return a dataframe with information about the
                        time-to-time displacements
append_dynamics         Return a data frame with extra columns with
                        dynamical information
approx_derivative       Approximate derivative
curvature               Return curvatures
curvature_radius        Return curvature radius
displacement            Return displacements
example_mov             Example data set
get_polar_coordinates   Get polar coordinates
speed                   Return speeds
