ellipse: draw circles and ellipses

In byandell/pda: Practial Data Analysis for Designed Experiments

Usage

circle(x=0, y=0, radius=1, sx, sy, ...)
ellipse(x=0, y=0, sx=1, sy=1, rho=0, fine=0.005, center=0.1,
  show=TRUE, add=TRUE, xlab, ylab, bty, xaxt, yaxt, type, lty, pty, ...)
norm.ellipse(x, y, level=0.05,
  radius=sqrt(qchisq(1-level,2)), ...)
panel.ellipse(x=0, y=0, sx=1, sy=1, rho=0, fine=0.005, center=0.1,
  xlab, ylab, bty, xaxt, yaxt, type, lty, pty, ...)

Arguments

x,y	center of circle or ellipse before orienting
radius	length of radius (positive)
sx,sy,rho	standardizing units for x,y (positive)and correlation between x and y (between -1 and 1)
fine	fineness of arcs for drawing (between 0 and 1)
center	if positive, fraction of radius for main axes
show	plot ellipse or circle if TRUE
add	add to existing plot if TRUE
level	probability level (default 0.05)
xlab,ylab,xaxt,yaxt,type,lty,pty,bty	plot parameters
...	other plot parameters (many are set if add=F)

Value

list of dataframes containing ellipse or circle arc(s)

Examples

# circle with unit radius
circle()
# return coordinates of arc for ellipse
ellipse(sx=2,sy=3,rho=.5,show=FALSE)
# ellipse rotated 45 degrees, centered at (1,2)
ellipse(xo=1,yo=2,sx=.25,sy=.5,orient=pi/2)
# ellipse at (1,2), but then rotated 45 degrees
ellipse(x=1,y=2,sx=.25,sy=.5,orient=pi/2)
## Not run: 
# 95% contour for bivariate normal from data (x,y)
norm.ellipse(x,y)

## End(Not run)

byandell/pda documentation built on May 13, 2019, 9:27 a.m.