draw.circle {plotrix}R Documentation

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,lwd=1)

Arguments

x,y Coordinates of the center of the circle.
radius Radius of the circle 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.
lwd Line width for the circumference.

Value

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

Note

The principal advantage of draw.circle is that it adjusts for the aspect ratio of the plot.

Author(s)

Jim Lemon

See Also

polygon

Examples

 plot(1:5,seq(1,10,length=5),type="n",xlab="",ylab="",main="Test draw.circle")
 draw.circle(2,2,0.5,border="purple",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",lty=1,lwd=1)
 draw.circle(3.5,7,0.8,border="blue",lty=2,lwd=2)

[Package plotrix version 2.7-2 Index]