draw.circle: Draw a circle

In plotrix/plotrix: Various Plotting Functions

Draw a circle

Description

Draws a circle on an existing plot.

Usage

 draw.circle(x,y,radius,nv=100,border=NULL,col=NA,lty=1,density=NULL,
  angle=45,lwd=1)

Arguments

x,y	Coordinates of the center of the circle.
radius	Radius (or radii) of the circle(s) in user units.
nv	Number of vertices to draw the circle.
border	Color to use for drawing the circumference.
col	Color to use for filling the circle.
lty	Line type for the circumference.
density	Density for patterned fill. See ‘⁠polygon⁠’.
angle	Angle of patterned fill. See ‘⁠polygon⁠’.
lwd	Line width for the circumference.

Details

‘⁠draw.circle⁠’ uses the dimensions of the plot and the ‘⁠x⁠’ and ‘⁠y⁠’ coordinates to draw a circle rather than an ellipse.

Value

A list with the x and y coordinates of the points on the circumference of the last circle displayed.

Author(s)

Jim Lemon, thanks to David Winsemius for the density and angle args

See Also

polygon

Examples

 plot(1:5,seq(1,10,length=5),type="n",xlab="",ylab="",main="Test draw.circle")
 draw.circle(2,4,c(1,0.66,0.33),border="purple",
  col=c("#ff00ff","#ff77ff","#ffccff"),lty=1,lwd=1)
 draw.circle(2.5,8,0.6,border="red",lty=3,lwd=3)
 draw.circle(4,3,0.7,border="green",col="yellow",lty=1,
  density=5,angle=30,lwd=10)
 draw.circle(3.5,8,0.8,border="blue",lty=2,lwd=2)

plotrix/plotrix documentation built on Feb. 19, 2024, 8:16 a.m.