How can I insert arrows on flows and export flows map with arrows indicating their direction in R?
I know that I can use the
arrows command of the
maptools library to "print" an arrow in line with the flow indicating its direction, but unfortunately, the command
arrows only works after the command
plot("object that contains the map") run. When I export the map, of course the arrows are not exported because they are not part of the shapefile that is generated by
So, is there any way this be done?