arrow {grid}R Documentation

Describe arrows to add to a line.


Produces a description of what arrows to add to a line. The result can be passed to a function that draws a line, e.g., grid.lines.


arrow(angle = 30, length = unit(0.25, "inches"),
      ends = "last", type = "open")


angle The angle of the arrow head in degrees (smaller numbers produce narrower, pointier arrows). Essentially describes the width of the arrow head.
length A unit specifying the length of the arrow head (from tip to base).
ends One of "last", "first", or "both", indicating which ends of the line to draw arrow heads.
type One of "open" or "closed" indicating whether the arrow head should be a closed triangle.



[Package grid version 2.5.0 Index]