Changes to the trajr package

trajr 1.5.0.9000

• 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).

trajr 1.5.0

• 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 function 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

trajr 1.4.0

• 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.

trajr 1.3.0

• 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.

trajr 1.2.0

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

trajr 1.1.0

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