Arrowhead {shape} | R Documentation |
adds one or more arrowheads to a plot; shape is either curved, a triangle, a circle or simple
Arrowhead(x0, y0, angle=0, arr.length=0.4, arr.width=arr.length/2, arr.adj=0.5, arr.type="curved", lcol="black", lty=1, arr.col=lcol, npoint=5)
x0 |
x-coordinates of points at which to draw arrowhead; either one value or a vector |
y0 |
y-coordinates of points at which to draw arrowhead; either one value or a vector |
angle |
angle of arrowhead (anti-clockwise, relative to x-axis), in degrees [0,360]; either one value or a vector |
arr.length |
approximate length of arrowhead, in cm; either one value or a vector |
arr.width |
approximate width of arrowhead, in cm; either one value or a vector |
arr.adj |
0,0.5,1 specifying the adjustment of the arrowhead |
arr.type |
type of arrowhead to draw, one of "simple","curved","triangle","circle" |
lcol |
line color specifications; either one value or a vector |
lty |
line type specifications; either one value or a vector |
arr.col |
color of arrowhead; either one value or a vector |
npoint |
only if arr.type = "curved": number of points to draw the curve; increase for smoother arrowheads |
x0, y0, angle, arr.length, arr.width, lcol, lty and arr.col can be a vector, of the same length.
The type of the arrowhead is set with "arr.type" which can take the values:
Karline Soetaert <k.soetaert@nioo.knaw.nl>
emptyplot(main="Arrowhead") Arrowhead(x0=runif(10),y0=runif(10),angle=runif(10)*360, arr.length=0.3,arr.type="circle",arr.col="green") Arrowhead(x0=runif(10),y0=runif(10),angle=runif(10)*360, arr.length=0.4,arr.type="curved",arr.col="red") Arrowhead(x0=runif(10),y0=runif(10),angle=runif(10)*360, arr.length=runif(10),arr.type="triangle",arr.col=rainbow(10))