Given a set of coordinates representing an object's trajectory,
this function builds a trajectory table that can then be used to work with
the functions provided by the
track(id = NULL, x, y, z = NULL, t, t0 = NULL, units = "secs", geo = FALSE, tz = NULL)
A unique identifier for the trajectory. It can be a number or a
character string. If not set, it defaults to 0. Multiple track identifiers
can be passed to the function, in which case
|x, y, z||
Vectors of coordinates. Note that
A numeric vector of the time elapsed since the beginning of the
tracking. The time units are specified in
A character string indicating the units in which
A logical value indicating whether the locations are defined by geographic coordinates (default: FALSE).
An optional time zone specification for
A trajectory table.