| grid.circle {grid} | R Documentation |
Functions to create and draw a circle.
grid.circle(x=0.5, y=0.5, r=0.5, default.units="npc", name=NULL,
gp=gpar(), draw=TRUE, vp=NULL)
circleGrob(x=0.5, y=0.5, r=0.5, default.units="npc", name=NULL,
gp=gpar(), vp=NULL)
x |
A numeric vector or unit object specifying x-locations. |
y |
A numeric vector or unit object specifying y-locations. |
r |
A numeric vector or unit object specifying radii. |
default.units |
A string indicating the default units to use
if x, y, width, or height
are only given as numeric vectors. |
name |
A character identifier. |
gp |
An object of class gpar, typically the output
from a call to the function gpar. This is basically
a list of graphical parameter settings. |
draw |
A logical value indicating whether graphics output should be produced. |
vp |
A Grid viewport object (or NULL). |
Both functions create a circle grob (a graphical object describing a
circle), but only grid.circle()
draws the circle (and then only if draw is TRUE).
The radius may be given in any
units; if the units are relative (e.g., "npc" or
"native") then the radius will be different depending on
whether it is interpreted as a width or as a height. In such cases,
the smaller of these two values will be the result. To see the
effect, type grid.circle() and adjust the size of the window.
A circle grob. grid.circle() returns the value invisibly.
Paul Murrell