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.
Here "horizontal" and "vertical" denote the position BEFORE rotation
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")