draw.ellipse: Draw ellipse

In plotrix: Various Plotting Functions

Draw ellipse

Description

Draws ellipses on an existing plot.

Usage

draw.ellipse(x, y, a = 1, b = 1, angle = 0, segment = NULL, 
arc.only = TRUE, deg = TRUE, nv = 100, border = NULL, 
col = NA, lty = 1, lwd = 1, ...)

Arguments

x	A vector or a matrix (if y is missing).
y	A vector, can be missing.
a,b	Vectors, radii of the ellypses along the two axes in user units.
angle	Angle of rotation in degrees (if deg=TRUE) or in radians (if deg=FALSE).
segment	Start and endpoints of arc in degrees (if deg=TRUE) or in radians (if deg=FALSE).
arc.only	Logical, if segmen the full ellipse is not drawn, radii from the ends of the arc are drawn to form a sector (see Examples).
deg	Logical, if angles are given in degrees (TRUE) or radians.
nv	Number of vertices to draw the ellipses.
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.
...	Additional arguments passed to polygon.

Value

Draw ellipses as a side effect.

Author(s)

Peter Solymos <[e-mail]>

See Also

polygon

Examples

plot(c(0,10), c(0,10), type="n", main="test draw.ellipse")
draw.ellipse(c(3,7), c(8,8), c(0.5,1), c(1,0.5), col=c(2,4),
 angle=c(45,0), segment=rbind(c(0,45),c(45,360)))
draw.ellipse(c(3,7), c(6,6), c(0.5,1), c(1,0.5), col=c(2,4),
 angle=c(45,0), segment=rbind(c(0,45),c(45,360)), arc.only=FALSE)
draw.ellipse(c(3,7), c(4,4), c(0.5,1), c(1,0.5), border=c(2,4),
 angle=c(45,0), segment=rbind(c(0,45),c(45,360)), arc.only=FALSE)
draw.ellipse(c(3,7), c(2,2), c(0.5,1), c(1,0.5), border=1,
 angle=c(45,0), lty=3)
draw.ellipse(c(3,7), c(2,2), c(0.5,1), c(1,0.5), border=c(5,3),
 angle=c(45,0), nv=c(3,4), lty=2, lwd=2)

plotrix documentation built on Nov. 10, 2023, 5:07 p.m.