R: Angles of the extremes of an arc

anglesArc {alphahull} | R Documentation

## Angles of the extremes of an arc

### Description

Given a vector v and an angle θ, `anglesArc` returns 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

    anglesArc(v, theta)

### Arguments

`v` | Vector v in the plane.
`theta` | Angle θ (in radians).

### Details

The angle that forms the vector v with the axis OX takes its value in [0,2π).

### Value

`angs` | Numeric vector with two components.

### Examples

    ## Not run:
    # Let v=c(0,1) and theta=pi/4
    # Consider the arc such that v is the internal angle bisector that
    # divides the angle 2*theta into two equal angles
    # The angles that the arc forms with the OX axis are pi/4 and 3*pi/4
    v <- c(0,1)
    theta <- pi/4
    anglesArc(v,theta)

    ## End(Not run)

[Package alphahull version 2.2 Index]