dga (version 2.0.1)

ellipse: A Helper Function Used by Venn4 to Define the Perimeter of an Ellipse

Description

Draws the ellipses used in venn4.

Usage

ellipse(x, y, a, b, alpha)

Arguments

x

the x coordinate of the center of the ellipse.

y

the y coordinate of the center of the ellipse.

a

the x-direction radius.

b

the y-direction radius.

alpha

the angle of rotation of the ellipse

Value

points that define the perimeter of an ellipse.

Examples

# NOT RUN {

plot(dga:::ellipse(0, 0, .5, .2, 1))
# }