Description Usage Arguments Details Examples
The function tracks
is used to create tracks objects. as.tracks
coerces
its argument to a tracks object, and is.tracks
tests for tracks objects.
c
can be used to combine (concatenate) tracks objects.
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x |
an object to be coerced or tested. |
... |
for For For |
Tracks objects are lists of matrices. Each matrix contains at least two
columns; the first column is time, and the remaining columns are a spatial coordinate.
The following naming conventions are used (and enforced by tracks
): The time
column has the name 't', and spatial coordinate columns have names 'x','y','z' if there
are three or less coordinates, and 'x1',...,'xk' if there are k ≥ 4
coordinates. All tracks in an object must have the same number of dimensions. The
positions in a track are expected to be sorted by time (and the constructor
tracks
enforces this).
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