Changes in version 1.5.1.9000                      

  - Add more 3d functionality: Traj3DVelocity, Traj3DAcceleration and
    Traj3DSpeed.
  - Fix bug in simulation vignette.

                 Changes in version 1.5.1 (2023-11-29)                  

  - Minor documentation changes: mention 3D in package overview and use
    new roxygen method to generate package documentation
    (https://github.com/r-lib/roxygen2/issues/1491).

                 Changes in version 1.5.0 (2023-06-24)                  

  - Added some basic 3D trajectory functionality; see Traj3DFromCoords
    and all functions prefixed with Traj3D.
  - TrajAngles now returns NA for the angles before and after
    zero-length segments. Thanks to Valentin Baumann for identifying
    this bug. This change could potential cause problems with existing
    code, but such a problem would indicate a problem with the old
    analysis. The bug occurred because in base R, Arg(0) == 0, which is
    not correct. Various functions that take means of TrajAngles now
    remove NA values.
  - Added function TrajFromTrjPoints to simplify operations such as
    removing zero-length segments from a trajectory.
  - Fix documentation of TrajDirectionalChange and TrajAngles. The
    documentation incorrectly stated that the number of angles returned
    was number of points - 1. It now states that the number of angles is
    number of points - 2 (which is number of segments - 1).
  - Fix bug in TrajFromCoords that incorrectly treated NA values in
    columns other than coordinates or time as an error.
  - Fix bug in TrajScale; yScale was being ignored.
  - Add some more named parameters to plot.Trajectory to avoid passing
    them to graphics::lines.
  - Add arg simConstantSpeed to TrajRediscretize and Traj3DRediscretize.
  - Add arg check.names to TrajsMergeStats.
  - Updated github continuous integration actions (using
    usethis::use_github_action("test-coverage") and
    usethis::use_github_action_check_release()). This change does not
    affect users

                 Changes in version 1.4.0 (2020-12-17)                  

  - Allow the creation of trajectories with 0 points in TrajFromCoords.
  - Fixed bug in TrajSpeedIntervals: no intervals were being returned if
    the entire trajectory qualified as an interval.
  - Fix bug in plot.TrajSpeedIntervals: time (x-axis) didn't handle
    trajectories with a non-zero starting time.
  - Added functions to assist in simulating trajectories that are
    bounded or vary spatially in some way. The new functions are
    TrajInPolygon, TrajSplit, TrajMerge and TrajSplitAtFirstCrossing.
  - Added functions to calculate velocity and acceleration: TrajVelocity
    and TrajAcceleration. The documentation for TrajDerivatives has been
    updated to state that the acceleration returned is not really
    acceleration, rather it is change in speed over time.
  - Added argument diff to TrajSpeedIntervals to control how speed is
    calculated. Default is "backward" so the function is
    backwards-compatible, although "central" is usually a better choice.

                 Changes in version 1.3.0 (2019-06-10)                  

  - Detect and report some invalid parameter values.
  - Altered handling of parameter readcsvFn to TrajsBuild to make it
    possible to use readr::read_csv without a wrapper function.
  - Added function TrajResampleTime to resample a trajectory to fixed
    step times.
  - Added parameters start.pt.pch and start.pt.col to plotting
    functions.
  - Added parameter dt to TrajTranslate
  - Fix vertical extents of rectangles in plot.TrajSpeedIntervals to
    handle non-default ylim values.
  - Added optional progressbar to TrajsMergeStats.
  - TrajsMergeStats now passes the arguments stringsAsFactors = FALSE to
    rbind. This prevents incorrect behaviour and the warning "invalid
    factor level, NA generated" if one or more of your statistics are
    characters.
  - Enhanced TrajRotate to allow absolute rotation and arbitrary origin
    of rotation.

                        Changes in version 1.2.0                        

  - Added start.pt.cex parameter to function lines.Trajectory.
  - Added function TrajConvertTime.

                 Changes in version 1.1.0 (2018-05-10)                  

  - Added correct citation.
  - Fixed: plot.TrajSpeedIntervals was not passing additional arguments
    (...) to plot.
  - Added: functions TrajDuration, TrajMeanVelocity, TrajTranslate.
  - Added translateToOrigin parameter to function TrajsBuild.