| ElapsedTimeProgressBarFn | A general purpose progress bar that reports elapsed time rather than number of items | 
| lines.Trajectory | Add Trajectory lines to a plot | 
| plot.TrajDirectionAutocorrelations | Plot method for direction autocorrelation | 
| plot.Trajectory | Plot method for trajectories | 
| plot.TrajSpeedIntervals | Plot method for trajectory speed intervals | 
| points.Trajectory | Add Trajectory points to a plot | 
| 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 | 
| TrajDAFindFirstMaximum | First direction autocorrelation minimum/maximum | 
| TrajDAFindFirstMinimum | First direction autocorrelation minimum/maximum | 
| TrajDAMinMax | First direction autocorrelation minimum/maximum | 
| TrajDerivatives | Calculates trajectory speed and change of speed | 
| TrajDirectionalChange | Directional change (DC) | 
| TrajDirectionAutocorrelations | Direction autocorrelation | 
| 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 | 
| TrajsBuild | Construct multiple trajectories | 
| TrajScale | Scale a trajectory | 
| TrajSinuosity | Sinuosity of a trajectory | 
| TrajSinuosity2 | Sinuosity of a trajectory | 
| TrajsMergeStats | Merge trajectory characteristics | 
| 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 | 
| TrajsStatsReplaceNAs | Replace NAs in a data frame | 
| TrajsStepLengths | Step lengths of multiple trajectories | 
| TrajStepLengths | Trajectory step lengths | 
| TrajStraightness | Straightness of a Trajectory | 
| TrajTranslate | Translate a trajectory | 
| TrajVelocity | Velocity of a trajectory |