speed with sparse movestacks does not work
> speed(moveStack(replicate(2,move(1:4,1:4, Sys.time()+1:4, data=data.frame(sex=gl(1,4))))))
Error in validObject(.Object) :
invalid class “SpatialPointsDataFrame” object: invalid object for slot "data" in class "SpatialPointsDataFrame": got class "logical", should be or extend class "data.frame"
Edited by bart