TrajRediscretize: Resample a trajectory to a constant step length

In trajr: Animal Trajectory Analysis

Resample a trajectory to a constant step length

Description

Constructs a new trajectory by resampling the input trajectory to a fixed step (or segment) length. By default, timing of frames is lost, so speed and acceleration cannot be calculated on a rediscretized trajectory. However, a constant speed may be applied to the rediscretized trajectory (simConstantSpeed = TRUE), in which case the returned trajectory will have (almost) constant speed, with average speed approximately equal to the average speed of trj.

Usage

TrajRediscretize(trj, R, simConstantSpeed = FALSE)

Arguments

trj	The trajectory to be resampled.
R	rediscretization step length, in the spatial units of trj.
simConstantSpeed	If TRUE, speeds are interpolated along the new trajectory so that average speed is approximately the same as that of trj.

Details

Based on the appendix in Bovet and Benhamou, (1988).

Value

A new trajectory with a constant segment length which follows trj.

References

Bovet, P., & Benhamou, S. (1988). Spatial analysis of animals' movements using a correlated random walk model. Journal of Theoretical Biology, 131(4), 419-433. doi:10.1016/S0022-5193(88)80038-9

trajr documentation built on May 29, 2024, 11:52 a.m.