R: Add an arc to a plot

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_θ v and A_{-θ} v form with the axis OX, where A_θ v represents the clockwise rotation of angle θ 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 θ (in radians).
`...` | Arguments to be passed to methods, such as graphical parameters (see `par`).

### See Also

`plot.ahull`.

### Examples

    ## Not run:
    # 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)

    ## End(Not run)

[Package alphahull version 2.2 Index]