trajr (version 1.5.1)

TrajResampleTime: Resample a trajectory to a constant time interval.

Description

Constructs a new trajectory by resampling the input trajectory to a fixed time interval. Points are linearly interpolated along the trajectory. Spatial and time units are preserved.

Usage

TrajResampleTime(trj, stepTime, newFps = NULL)

Value

A new trajectory with a constant time interval for each step. Points in the new trajectory are calculated by linearly interpolating along

trj.

Arguments

trj

The trajectory to be resampled.

stepTime

The resampled trajectory step time. Each step in the new trajectory will have this duration.

newFps

Value to be stored as the FPS value in the new trajectory (see TrajGetFPS). It is not otherwise used by this function.

Examples

# Simulate a trajectory with steps every 5 hours
set.seed(46)
trj <- TrajGenerate(10, stepLength = 5, fps = 1/5, timeUnits = "hours", linearErrorSd = .8)

# Resample to 1 hour steps
resampled <- TrajResampleTime(trj, 1)

par(mar = c(5, 4, .5, .5))
plot(trj, lwd = 2)
points(trj, pch = 16)
points(resampled, col = "red", draw.start.pt = FALSE)