shape (version 1.4.6.1)

filledcircle: adds colored circle to a plot

Description

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

Usage

filledcircle(r1 = 1, r2 = 0, mid = c(0,0), dr = 0.01, from = -pi, to = pi, 
  col = femmecol(100), values = NULL, zlim = NULL, lwd = 2, lcol = NA, ...)

Value

returns, as invisible a list containing "xyouter" and "xyinner", the points that define the outer and inner ellipse.

Arguments

r1

radius of outer circle.

r2

radius of inner circle.

mid

midpoint of circle.

dr

size of segments, in radians, to draw circle (decrease for smoother).

from

starting angle for circle segment, radians.

to

final angle for circle segment, radians. The segment is drawn counterclockwise. The default is to draw a full circle.

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.

Author

Karline Soetaert <[e-mail]>

Details

see filledellipse for details

See Also

filledshape, filledcylinder, filledellipse

Examples

color <-graycol(n = 50)
dr    <- 0.05
emptyplot(xlim = c(-2, 2), col = color[length(color)], 
          main = "filledcircle")
filledcircle(r1 = 1, mid = c(1, 1), dr = dr, 
          col = shadepalette(endcol = "darkblue")) 
filledcircle(r1 = 1, mid = c(-1, -1), dr = dr, 
          col = shadepalette(endcol = "darkred"))
filledcircle(r1 = 1, r2 = 0.5, mid = c(0, 0), dr = dr, 
          col = c(rev(color), color))
filledcircle(r1 = 1, mid = c(1, -1), dr = dr, 
          col = intpalette(c("red", "blue", "orange"), 100)) 
filledcircle(mid = c(-1, 1))
  
emptyplot(main = "filledcircle")

for (i in seq(0, 0.45, 0.05)) 
   filledcircle(r1 = i+0.05, r2 = i, 
                mid = c(0.5, 0.5), col = i*20)