All functions
calculateIntervalResidenceTime	Calculates residence time within user-specified breaks
drawCircle	Draws a circle
getRecursions	Calculates recursion information from the trajectory
getRecursionsAtLocations	Calculates recursion information from the trajectory for specific locations
getRecursionsInPolygon	Calculates recursion information from the trajectory inside a polygon
data	Sample trajectory (martin).
plot	Calculates recursion information from the trajectory
recurse	Computes revisitation metrics for trajectory data
data	Sample trajectory (track).
data	Sample trajectory (wren).