cArrows: Draw curved lines with arrowhead

Description

Draw a curved line with arrowhead.

Usage

cArrows(
  x1,
  y1,
  x2,
  y2,
  code = 2,
  size = 1,
  width = 1.2/4/cin,
  open = TRUE,
  sh.adj = 0.1,
  sh.lwd = 1,
  sh.col = par("fg"),
  sh.lty = 1,
  h.col = sh.col,
  h.col.bo = sh.col,
  h.lwd = sh.lwd,
  h.lty = sh.lty,
  curved = FALSE,
  beautiful.arrow = 2/3
)

Value

A list wit lab.x and lab.y being the position where to draw label

Arguments

x1: coordinates of points from which to draw.
y1: coordinates of points from which to draw.
x2: coordinates of points to which to draw.
y2: coordinates of points to which to draw.
code: integer code (1, 2, or 3), determining kind of arrows to be drawn.
size: size of the arrowhead.
width: width of the arrowhead.
open: shape of the arrowhead.
sh.adj: Shift the beginning of the line.
sh.lwd: width of the line.
sh.col: color of the line.
sh.lty: type of line.
h.col: color of the arrowhead.
h.col.bo: color of the arrowhead border.
h.lwd: width of the arrowhead.
h.lty: type of line for the arrowhead.
curved: 0 is a straigth line, positive of negative value make the line curved.
beautiful.arrow: if open is false, make the arrowhead more beautiful.

Author

Modified from iGraph

Details

cArrows draws curved lines with arrowhead

Examples

Run this code

plot(c(1, 10), c(1, 10), type="n", bty="n")
cArrows(x1=2, y1=2, x2=6, y2=6, curved=1)
cArrows(x1=2, y1=2, x2=6, y2=6, curved=0)
cArrows(x1=2, y1=2, x2=6, y2=6, curved=1, sh.adj=1)
cArrows(x1=2, y1=2, x2=6, y2=6, curved=-1, open=FALSE)
cArrows(x1=9, y1=2, x2=6, y2=6, curved=-1, open=FALSE, sh.col="red")
cArrows(x1=9, y1=9, x2=6, y2=6, curved=-1, open=FALSE, h.col="red")
cArrows(x1=2, y1=9, x2=6, y2=6, curved=1, open=FALSE, h.col="red", h.col.bo="red")

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