circle: Plot a Circle or Regular Polygon

In mwrowe/microRutils: Mike Rowe's Miscellaneous R Utility Functions

Description

Plot a circle or regular polygon of a given radius at a given location.

Usage

circle(x, y = 0, add = T, segs = 100, how = "radius", ...)

Arguments

x	A numeric vector of length 1 or 2: If length(x)==1: origin is assumed to be c(0,0); x-coordinate of a radial segment. If length(x)==2: x-coordinates of origin (x[1]) and radius endpoint.
y	Optional numeric vector of length 1 or 2: If omitted: assume y-coordinates of zero. If length(y)==1: origin is assumed to be c(0,0); y-coordinate of a radial segment. If length(y)==2: y-coordinates of origin (x[1]) and radius endpoint.
add	Logical value indicating whether circle should be added to an existing plot (default) or to a new plot.
segs	Integer; number of segments used to approximate a circle. A small number will produce a regular polygon inscribed within the radius, with a vertex at x, y
how	Character string specifying how x and y relate to the circle geometry. Currently only radius is implemented.
...	Other named arguments passed to lines or plot (such as lwd, lty, col, etc.)

Value

Returns a data.frame with columns x and y specifying coordinates of the vertices.

Author(s)

M.W.Rowe, [e-mail]

See Also

par and plot.default give more detailed descriptions of the ... plotting parameters.

mwrowe/microRutils documentation built on June 12, 2021, 2:41 p.m.