| draw.circle {plotrix} | R Documentation |
Draws a circle on an existing plot.
draw.circle(x,y,radius,nv=100,border=NULL,col=NA,lty=1,lwd=1)
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. |
lwd |
Line width for the circumference. |
draw.circle uses the dimensions of the plot and the x and y coordinates to draw a circle rather than an ellipse.
A list with the x and y coordinates of the points on the circumference of the last circle displayed.
Jim Lemon
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",lty=1,lwd=1)
draw.circle(3.5,7,0.8,border="blue",lty=2,lwd=2)