This function returns the speed between consecutive locations of Move or MoveStack object.
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Speed in map units/second.
If the projection of the coordinates is long/lat all values are returned in m/s, otherwise in the map units/second of the projection of the move object. Check and set the projection of your Move, MoveStack or MoveBurst object using the
moveBurst object is provided, a numeric vector one element shorter than the number of locations is obtained.
moveStack object is provided, a list with one element per individual containing a numeric vector one element shorter than the number of locations is obtained.
Marco Smolla & Anne Scharf
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# speeds from a Move object data(leroy) head(speed(leroy)) # to add this information to the move object, a "NA" has to be assigened # e.g. to the last location (it also could be assigend to the first location). leroy$speed <- c(speed(leroy), NA) ## speeds from a MoveStack object data(fishers) str(speed(fishers)) # to add this information to the moveStack object, a "NA" has to be assigened # e.g. to the last location of each individual (it also could be assigend to the first location). fishers$speed <-unlist(lapply(speed(fishers), c, NA))
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