cArrows: Draw curved lines with arrowhead

In HelpersMG: Tools for Environmental Analyses, Ecotoxicology and Various R Functions

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 = if (is.R()) par("fg") else 1,
  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
)

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.

Details

cArrows draws curved lines with arrowhead

Value

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

Author(s)

Modified from iGraph

Examples

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")

HelpersMG documentation built on Oct. 5, 2023, 5:08 p.m.