R: Small Circle on Stereonet

addsmallcirc {RFOC} | R Documentation

## Small Circle on Stereonet

### Description

Calculate and plot small circle on Stereo net at arbitrary azimuth, orientation and conical angle

### Usage

    addsmallcirc(az, iang, alphadeg, BALL.radius = 1, N = 100, add = TRUE, ...)

### Arguments

`az` | Azimuth of axis
`iang` | angle of dip, degrees
`alphadeg` | width of cone in degrees
`BALL.radius` | size of sphere
`N` | NUmber of points to calculate
`add` | logical, TRUE=add to existing plot
`...` | graphical parameters

### Details

Given the azimuth and dip of a vector, plot the small circle around the pole with conical angle alphadeg

### Value

LIST:

`x` | x-coordinates
`y` | y-coordinates

### Note

alphadeg is the radius of the conic projection

### Author(s)

Jonathan M. Lees<jonathan.lees@unc.edu>

### See Also

net

### Examples

    net()
    addsmallcirc(65, 13, 20, BALL.radius = 1, N = 100, add = TRUE)
    addsmallcirc(165, 73, 5.6, BALL.radius = 1, N = 100, add = TRUE)

[Package RFOC version 3.4-3 Index]