ElapsedTimeProgressBarFn
                        A general purpose progress bar that reports
                        elapsed time rather than number of items
Traj3DDistance          3D Trajectory distance
Traj3DFromCoords        Create a 3D Trajectory Object
Traj3DLength            3D trajectory length
Traj3DRediscretize      Resample a 3D trajectory to a constant step
                        length
Traj3DResampleTime      Resample a 3D trajectory to a constant time
                        interval
Traj3DSmoothSG          Smooth a 3D trajectory using a Savitzky-Golay
                        filter
Traj3DStepLengths       3D trajectory step lengths
Traj3DStraightness      Straightness of a 3D Trajectory
TrajAcceleration        Approximates the acceleration of a trajectory
TrajAngles              Turning angles of a Trajectory
TrajConvertTime         Converts a delimited time string to a numeric
                        value
TrajDAMinMax            First direction autocorrelation minimum/maximum
TrajDerivatives         Calculates trajectory speed and change of speed
TrajDirectionAutocorrelations
                        Direction autocorrelation
TrajDirectionalChange   Directional change (DC)
TrajDistance            Trajectory distance
TrajDuration            Trajectory duration
TrajEmax                Trajectory straightness index, E-max
TrajExpectedSquareDisplacement
                        Trajectory expected square displacement
TrajFractalDimension    Fractal dimension of a trajectory
TrajFractalDimensionValues
                        Fractal dimension calculation
TrajFromCoords          Create a Trajectory Object
TrajFromTrjPoints       Create a trajectory from a subset of another
TrajGenerate            Generate a random trajectory
TrajGetFPS              Trajectory frames-per-second
TrajGetNCoords          Trajectory number of coordinates
TrajGetTimeUnits        Trajectory temporal units
TrajGetUnits            Trajectory spatial units
TrajInPolygon           Test whether each of the points in a trajectory
                        lie inside a polygon
TrajLength              Trajectory length
TrajLogSequence         Logarithmically spaced sequence
TrajMeanVectorOfTurningAngles
                        Mean vector of turning angles
TrajMeanVelocity        Trajectory mean velocity
TrajMerge               Combine multiple trajectories into a single
                        whole trajectory
TrajRediscretize        Resample a trajectory to a constant step length
TrajResampleTime        Resample a trajectory to a constant time
                        interval.
TrajReverse             Reverse a trajectory
TrajRotate              Rotate a trajectory
TrajScale               Scale a trajectory
TrajSinuosity           Sinuosity of a trajectory
TrajSinuosity2          Sinuosity of a trajectory
TrajSmoothSG            Smooth a trajectory using a Savitzky-Golay
                        filter
TrajSpeedIntervals      Calculate speed time intervals
TrajSplit               Split a trajectory into multiple sections
TrajSplitAtFirstCrossing
                        Split a trajectory into two parts, separated at
                        the first boundary crossing
TrajStepLengths         Trajectory step lengths
TrajStraightness        Straightness of a Trajectory
TrajTranslate           Translate a trajectory
TrajVelocity            Velocity of a trajectory
TrajsBuild              Construct multiple trajectories
TrajsMergeStats         Merge trajectory characteristics
TrajsStatsReplaceNAs    Replace NAs in a data frame
TrajsStepLengths        Step lengths of multiple trajectories
lines.Trajectory        Add Trajectory lines to a plot
plot.TrajDirectionAutocorrelations
                        Plot method for direction autocorrelation
plot.TrajSpeedIntervals
                        Plot method for trajectory speed intervals
plot.Trajectory         Plot method for trajectories
points.Trajectory       Add Trajectory points to a plot
