TrajRotate: Rotate a trajectory
In JimMcL/trajr: Animal Trajectory Analysis

TrajRotate

R Documentation

Rotate a trajectory

Rotates a trajectory by angle (when relative is FALSE), or so that angle(finish - start) == angle (when relative is TRUE).

TrajRotate(trj, angle = 0, origin = c(0, 0), relative = TRUE)

`trj`	The trajectory to be rotated.
`angle`	The angle of rotation in radians. Either the first and last points in the rotated trajectory (when `relative = TRUE`), or else the angle be rotated (when `relative = FALSE`).
`origin`	Trajectory is rotated about this point.
`relative`	If TRUE, `angle` is the angle (after rotation) from the start to the end point of the trajectory. If FALSE, the trajectory is rotated about its start point by `angle`. You probably want to use `relative = TRUE`.