Draw a circle — circle • eechidna

##' From https://github.com/chxy/cartogram/blob/master/R/dorling.R Not exported here, but needed for aec_carto_f

circle(
  xvec,
  yvec,
  rvec,
  vertex = 100,
  border = 1,
  col = NULL,
  add = TRUE,
  square = FALSE,
  ...
)

Arguments

xvec: X-coordinates
yvec: Y-coordinates
rvec: Radii
vertex: The number of vertices of the circle
border: Color of border
col: Color to render in circle
add: Whether the circles are added to another plot.
square: A logical value to determine whether to draw squares.
...: other things

Details

This function is used to compute the locations of the circle border and draw multiple circles. It borrows the code from plotrix::draw.circle

Examples

if (FALSE) {
x=y=1:5
r=5:1/5
circle(x,y,r,add=FALSE,asp=1)
circle(x,y,r,vertex=6,add=TRUE)  # hexagon
circle(x,y,r,vertex=4,add=TRUE)  # diamond
circle(x,y,r,square=TRUE,add=TRUE)  # square
}