plotcircle {shape} | R Documentation |
adds part of a colored circle to a plot
Description
adds (part of) a colored circle to a plot; an arrow can be drawn at a specified position
Usage
plotcircle(r = 1, ...)
Arguments
r |
radius of circle. |
... |
arguments passed to function plotellipse. |
Details
plotcircle
calls plotellipse
, making sure that the figure
drawn effectively looks like a circle.
For graphs that have both axes of equal size, the circle will be equal
to the ellipse with equal rx and ry. See second example
see plotellipse
for details
Author(s)
Karline Soetaert <karline.soetaert@nioz.nl>
See Also
plotellipse
to draw ellipses
Examples
# symmetrical axes
emptyplot(c(0, 1))
plotcircle(mid = c(0.5, 0.5), r = 0.25, from = 0, to = 3*pi/2,
arrow = TRUE, arr.pos = 0.5, col = "red")
# symmetrical
plotellipse(mid = c(0.5, 0.5), rx = 0.2, ry = 0.2,
arrow = TRUE, arr.pos = 0.5, col = "blue")
#non-symmetrical axes
emptyplot(c(0, 1), c(0, 2), main = "plotcircle", asp = FALSE)
plotcircle(mid = c(0.5, 0.5), r = 0.25, from = 0, to = 3*pi/2,
arrow = TRUE, arr.pos = 0.5, col = "red")
plotellipse(mid = c(0.5, 0.5), rx = 0.25, ry = 0.25,
arrow = TRUE, arr.pos = 0.5, col = "blue")
[Package shape version 1.4.6.1 Index]