grid.circle {grid} | R Documentation |
This function draws a circle.
grid.circle(x=0.5, y=0.5, r=0.5, default.units="npc", gp=gpar(), draw=TRUE, 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. |
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). |
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.
The "grob"
object contains an object of class "circle"
.
An object of class "grob"
.
Paul Murrell