ggpLayerSpatialTrajectories.RdAdds spatial trajectories in form of arrows to a surface plot.
An object of class SPATA2 or, in case of S4 generics,
objects of classes for which a method has been defined.
Character vector. The IDs of the trajectories that should be plotted.
A list of arguments given to ggplot2::arrow(). Based
on which the trajectories are plotted.
Additional arguments given to ggplot2::geom_segment().
ggpLayer*()-functions return lists of ggproto objects
that can be added to ggplots via the + operator. In most of the cases
they are supposed to be added to plots created with the plotSurface*()
family.