filledellipse {shape}R Documentation

adds a colored and rotated ellipse to a plot

Description

plots (part of) outer and inner ellipses and colors inbetween; color can be a palette

Usage

filledellipse(rx1=1, rx2=0, ry1=rx1, ry2=NULL, mid=c(0,0), 
  dr=0.01, angle=0, from=-pi, to=pi, col=femmecol(100),  
  values=NULL, zlim=NULL, lwd=2, lcol=NA, ...)

Arguments

rx1 horizontal radius of outer ellipse
rx2 horizontal radius of inner ellipse
ry1 vertical radius of outer ellipse
ry2 vertical radius of inner 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
col color palette to be used; also allowed are two extremes or one value
values if not null, a matrix providing (radius,z-values) couples, used for coloring.
zlim Only if values is not NULL: the minimum and maximum z values for which colors should be plotted, defaulting to the range of the finite values of the second column of *values*.
lwd width of external line
lcol line color
... arguments passed to R-function "polygon"

Details

draws (part of) an outer and inner ellipse, as specified by inner and outer radiusses: rx1,ry1: horizontal and vertical radiusses of outer ellipse; rx2,ry2: same for inner ellipse. Here "horizontal" and "vertical" denote the position BEFORE rotation

Fills with a palette of colors inbetween

values: if not null, a matrix providing (radius,z-values) couples, used for coloring. Here radius are positive values denoting the relative distance between the shapes centre and edge. The radiusses are rescaled to be in [0,1] if needed. z-values (2nd column of *values*) together with zlim and col denote the coloration level. Colors in *col* will be interpolated to the z-values and used to color an interval as given by the input radiusses.

If rl2, the long radius of the inner ellipse is 0, the ellipse is full

Author(s)

Karline Soetaert <k.soetaert@nioo.knaw.nl>

See Also

filledshape, filledcylinder

Examples

color <-greycol(50)
  dr    <- 0.05
  emptyplot(xlim=c(-2,2),ylim=c(-2,2),col=color[length(color)],
            main="filledellipse")
  filledellipse(rx1=1,mid=c(1,1) ,dr=dr,
                col=shadepalette(endcol="darkblue")) 
  filledellipse(rx1=1,ry1=0.5,mid=c(-1,-1),dr=dr,angle=90,
                col=shadepalette(endcol="darkred"))
  filledellipse(rx1=1,ry1=0.5,rx2=0.5,dr=dr,mid=c(0,0),
                col=c(rev(color),color))
  filledellipse(rx1=0.5,mid=c(1,-1),dr=dr,from=pi, to=1.5*pi,
                col=rev(shadepalette(endcol="black"))) 
  filledellipse(mid=c(-1,1))  
  
  emptyplot(xlim=c(-2,2),ylim=c(-2,2),main="filledellipse")
  filledellipse(rx1=0.75,mid=c(-1,1),col=greycol(100) ,dr=dr, 
                values=cbind (1:100,(1:100)^0.5))
  filledellipse(rx1=0.75,mid=c(1,1),col=greycol(100)  ,dr=dr, 
                values=cbind (1:100,(1:100)))
  filledellipse(rx1=0.75,mid=c(-1,-1),col=greycol(100),dr=dr, 
                values=cbind (1:100,(1:100)^2))
  filledellipse(rx1=0.75,mid=c(1,-1),col=greycol(100) ,dr=dr, 
                values=cbind (1:100,(1:100)^5))

[Package shape version 1.2.1 Index]