Prettified Arrows Plots
p.arrows.RdDraws arrows, like the arrows function, but with
“nice” filled arrow heads.
Arguments
- x1, y1
coordinates of points from which to draw.
- x2, y2
coordinates of points to which to draw.
- size
symbol size as a fraction of a character height; default 1.
- width
width of the arrow head; defaults to ....
- fill
color for filling the arrow head.
- ...
further arguments passed to
segments().

