Describe arrows to add to a line.

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Description

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.

Usage

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

Arguments

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.

Examples

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