arc {alphahull}R Documentation

Add an arc to a plot

Description

This function adds the arc of B(c,r) between the angles that A_theta v and A_{-theta} v form with the axis OX, where A_theta v represents the clockwise rotation of angle theta of the vector v.

Usage

arc(c, r, v, theta, ...)

Arguments

c Center c of the arc.
r Radius r of the arc.
v Vector v in the plane.
theta Angle theta (in radians).
... Arguments to be passed to methods, such as graphical parameters (see par).

See Also

plot.ahull.

Examples

# Plot of the circumference of radius 1
theta<-seq(0,2*pi,length=100)
r<-1
plot(r*cos(theta),r*sin(theta),type="l")
# Add in red the arc between pi/4 and 3*pi/4
arc(c(0,0),1,c(0,1),pi/4,col=2,lwd=2)

[Package alphahull version 0.1 Index]