bezierArrowSmpl: A simple bezier arrow

In raredd/Gmisc0: Collection of functions for plotting relations, generating tables, and more.

Description

This is an alternative to the grid packages bezierGrob with the advantage that it allows you to draw an arrow with a specific unit width. Note, it has only a end-arrow at this point.

Usage

bezierArrowSmpl(x = c(0.2, 0.7, 0.3, 0.9), y = c(0.2, 0.2, 0.9, 0.9),
  width = 0.05, clr = "#000000", default.units = "npc",
  arrow = list(base = unit(0.1, "npc"), length = unit(0.1, "npc")),
  align_2_axis = TRUE, name = NULL, gp = gpar(), vp = NULL)

Arguments

x	A numeric vector or unit object specifying x-locations of spline control points.
y	A numeric vector or unit object specifying y-locations of spline control points.
width	The width of the arrow, either a numeric single number or a unit. Note: The arrow does not rely on lwd but on actual width.
clr	The color of the arrow.
default.units	A string indicating the default units to use if x or y are only given as numeric vectors.
arrow	This is a list with all the base (width) and the desired length for the arrow. Note: This differs from the original bezierGrob function.
align_2_axis	Indicates if the arrow should be vertically/horizontally aligned. This is useful for instance if the arrow attaches to a box.
name	A character identifier.
gp	An object of class gpar, typically the output from a call to the function gpar. This is basically a list of graphical parameter settings.
vp	A Grid viewport object (or NULL).

Value

grid::grob A grob of the class polygonGrob with attributes that correspond to the bezier points.

Examples

library(grid)
grid.newpage()
arrowGrob <- bezierArrowSmpl(x = c(.1,.3,.6,.9),
                             y = c(0.2, 0.2, 0.9, 0.9))
grid.draw(arrowGrob)

raredd/Gmisc0 documentation built on May 27, 2019, 2:02 a.m.