plotellipse {shape} | R Documentation |
adds (part of) a colored, and rotated ellipse to a plot; an arrow can be drawn at a specified position.
plotellipse(rx=1, ry=0.2, mid=c(0,0), dr=0.01, angle=0,from=-pi,to=pi,type="l", lwd=2,lcol="black",col=NULL, arrow=FALSE, arr.length=0.4, arr.width=arr.length*0.5, arr.type="curved",arr.pos=1,arr.code=2,arr.adj=0.5, arr.col="black", ...)
rx |
long radius of ellipse. |
ry |
short radius of ellipse. |
mid |
midpoint of ellipse. |
dr |
size of segments, in radians, to draw ellipse (decrease for smoother). |
angle |
rotation angle, degrees. |
from |
starting angle for ellipse segment, radians. |
to |
final angle for ellipse segment, radians. |
type |
external line or points; "n" if no line. |
lwd |
width of external line. |
lcol |
line color. |
col |
fill color. |
arrow |
drawing arrowhead yes/no. |
arr.length |
length of arrowhead. |
arr.width |
width of arrowhead. |
arr.type |
type of arrow. |
arr.pos |
position of arrow, 0=start,1=end. |
arr.code |
integer code determining kind of arrows to draw. |
arr.adj |
adjustment of arrow. |
arr.col |
color of arrow head. |
... |
arguments passed to R-function lines. |
rx
and ry
are the horizontal and vertical radiusses of the
ellipses.
if arrow
is TRUE
, an arrow is drawn along the path of the
ellipse.
arr.length
and arr.width
set the size of the arrow.
The type of the arrowhead is set with arr.type
which can take
the values:
arr.pos
, a real value between 0 and 1 gives the position
(0=start,1=end).
arr.col
specifies the color, arr.code
specifies where the
angle points to.
arr.adj
specifies the position adjustment - see Arrows
for details.
Karline Soetaert <k.soetaert@nioo.knaw.nl>.
getellipse
, filledellipse
,
plotcircle
.
emptyplot(c(-1,1),main="plotellipse") plotellipse(rx=0.8,ry=0.3,angle=60,col="blue") plotellipse(rx=1.0,ry=0.6,angle=0,from=pi,to=2*pi,arrow=TRUE, arr.pos=seq(0.1,0.5,by=0.1),arr.col=rainbow(5)) plotellipse(rx=1.0,ry=0.6,angle=30,from=pi,to=1.2*pi,col="red")