Obtain the speed of a track.
speed(x, ...) ## S3 method for class 'track_xyt' speed(x, append_na = TRUE, ...)
x
A track_xyt.
track_xyt
...
Further arguments, none implemented.
append_na
[logical(1)=TRUE] Should an NA be appended at the end.
[logical(1)=TRUE]
NA
[numeric] The speed in m/s.
[numeric]
m/s