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Last data update: 2014.03.03

R: Add Arrows to a Plot Using Relative (0:1) Coordinates

addArrows

R Documentation

Add Arrows to a Plot Using Relative (0:1) Coordinates

Description

Call the arrows function using relative (0:1) coordinates.

Usage

addArrows(x1, y1, x2, y2, ...)

Arguments

`x1`	x-coordinate (0:1) at base of arrow.
`y1`	y-coordinate (0:1) at base of arrow.
`x2`	x-coordinate (0:1) at tip of arrow.
`y2`	y-coordinate (0:1) at tip of arrow.
`...`	additional parameters for the function `arrows`.

Details

Lines will be drawn from (x1[i],y1[i]) to (x2[i],y2[i])

Author(s)

Jon T. Schnute, Pacific Biological Station, Fisheries and Oceans Canada , Nanaimo BC

Examples

local(envir=.PBSmodEnv,expr={
  oldpar = par(no.readonly=TRUE)
  tt=seq(from=-5,to=5,by=0.01)
  plot(sin(tt), cos(tt)*(1-sin(tt)), type="l")
  addArrows(0.2,0.5,0.8,0.5)
  addArrows(0.8,0.95,0.95,0.55, col="#FF0066")
  par(oldpar)
})

Results


R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

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> library(PBSmodelling)
Error in library(PBSmodelling) : 
  there is no package called 'PBSmodelling'
Execution halted