ellipse: Plot an ellipse

In HelpersMG: Tools for Environmental Analyses, Ecotoxicology and Various R Functions

Plot an ellipse

Description

Plot a ellipse defined by the center and the radius. The options for binomial confidence parameters are:

• conf.level
  

• method must be one of these "wald", "wilson", "wilsoncc", "agresti-coull", "jeffreys", "modified wilson", "modified jeffreys", "clopper-pearson", "arcsine", "logit", "witting", "pratt", "midp", "lik" and "blaker". Defaults to "wilson". Abbreviation of method is accepted. See details.
  Default is wilsoncc (Wilson with continuity correction) col parameter can be a list of colors. See examples

Usage

ellipse(
  center.x = 0,
  center.y = 0,
  radius.x = 1,
  radius.y = 1,
  radius.x.lower = NULL,
  radius.x.upper = NULL,
  radius.y.lower = NULL,
  radius.y.upper = NULL,
  alpha = 0,
  binconf.x = NULL,
  binconf.y = NULL,
  control.binconf = list(conf.level = 0.95, method = "wilsoncc"),
  length = 100,
  ...
)

Arguments

center.x	Center of the ellipse on x axis
center.y	Center of the ellipse on y axis
radius.x	Radius along the x axis
radius.y	Radius along the y axis
radius.x.lower	Radius along the x axis, at left of center
radius.x.upper	Radius along the x axis, at right of center
radius.y.lower	Radius along the y axis, at bottom of center
radius.y.upper	Radius along the y axis, at top of center
alpha	Rotation in radians
binconf.x	A data.frame or a matrix with two columns, x and n or with three columns, PointEst, Lower, and Upper
binconf.y	A data.frame or a matrix with two columns, x and n or with three columns, PointEst, Lower, and Upper
control.binconf	A list with options for binomial confidence
length	Number of points to draw the ellipse
...	Graphical parameters

Details

ellipse plots an ellipse

Value

Nothing

Author(s)

Marc Girondot [e-mail]

Examples

plot(0:1, 0:1, xlim=c(0, 1), ylim=c(0,1), lty=2, type="l", las=1, bty="n", 
     xlab="Variable x", ylab="variable y")
 
ellipse(center.x = c(0.2, 0.3, 0.25), center.y = c(0.7, 0.6, 0.55), 
        radius.x = c(0.1, 0.1, 0.1), radius.y = c(0.15, 0.2, 0.4), 
        border=NA, col=rgb(red = 0.1, green = 0.1, blue = 0.1, alpha = 0.1))

ellipse(center.x = 0.5, center.y = 0.5, 
        radius.x.lower = 0.1, radius.x.upper = 0.3, 
        radius.y = 0.2, 
        border=NA, col=rgb(red = 0.1, green = 0.1, blue = 0.1, alpha = 0.1))

ellipse(center.x = 0.6, center.y = 0.3, 
        radius.x.lower = 0.3, radius.x.upper = 0.3, 
        radius.y.lower = 0.2, radius.y.upper = 0.4, 
        border=NA, col=rgb(red = 0.1, green = 0.1, blue = 0.1, alpha = 0.1))

plot(0:1, 0:1, xlim=c(0, 1), ylim=c(0,1), lty=2, type="l", bty="n", asp=1, 
     xlab="Variable x", ylab="variable y", axes=FALSE)
axis(1, at=c(0, 0.25, 0.5, 0.75, 1))
axis(2, at=c(0, 0.25, 0.5, 0.75, 1), las=1)

ellipse(center.x = 0.5, center.y = 0.5, radius.x = 0.2, radius.y = 0.4, 
       border=NA, col=rgb(red = 0.1, green = 0.1, blue = 0.1, alpha = 0.1))
ellipse(center.x = 0.5, center.y = 0.5, radius.x = 0.2, radius.y = 0.4, 
        border=NA, col=rgb(red = 0.1, green = 0.1, blue = 0.1, alpha = 0.1), alpha = pi/4)

plot(0:1, 0:1, xlim=c(0, 1), ylim=c(0,1), lty=2, type="l", las=1, bty="n", 
     xlab="Variable x", ylab="variable y")

for (k in 0:8)
  ellipse(center.x=0.5, center.y=0.5, radius.x=0.1, radius.y=0.4, 
          alpha=seq(from=0, to=pi/4, length=9)[k], 
          border=rainbow(9)[k])

# Exemple with confidence of proportions
males <- c(10, 25, 3, 4)
N <- c(12, 52, 17, 10)

males2 <- c(12, 20, 3, 6)
N2 <- c(15, 50, 20, 12)

plot(0:1, 0:1, xlim=c(0, 1), ylim=c(0,1), lty=2, type="l", las=1, bty="n", 
     xlab="Variable x", ylab="variable y")

ellipse(binconf.x = data.frame(x=males, n=N), binconf.y = data.frame(x=males2, n=N2),  
        border=NA, col=rgb(red = 0.1, green = 0.5, blue = 0.1, alpha = 0.1))
        
plot(0:1, 0:1, xlim=c(0, 1), ylim=c(0,1), lty=2, type="l", las=1, bty="n", 
     xlab="Variable x", ylab="variable y")
     
ellipse(binconf.x = data.frame(x=males, n=N), 
        binconf.y = data.frame(PointEst=c(0.1, 0.2, 0.3, 0.5), 
                               Lower=c(0.02, 0.12, 0.25, 0.30), 
                               Upper=c(0.18, 0.29, 0.35, 0.67)), 
        border=NA, col=rgb(red = 0.1, green = 0.5, blue = 0.1, alpha = 0.1))
        
# Examples with a gradient
plot(0:1, 0:1, xlim=c(0, 1), ylim=c(0,1), lty=2, type="l", las=1, bty="n", 
     xlab="Variable x", ylab="variable y")
ellipse(center.x = 0.6, center.y = 0.3, 
        radius.x.lower = 0.3, radius.x.upper = 0.3, 
        radius.y.lower = 0.2, radius.y.upper = 0.4, 
        border=NA, col=grey.colors(100, alpha = 0.1))
        
plot(0:1, 0:1, xlim=c(0, 1), ylim=c(0,1), lty=2, type="l", las=1, bty="n", 
     xlab="Variable x", ylab="variable y")
ellipse(binconf.x = data.frame(x=males, n=N), binconf.y = data.frame(x=males2, n=N2),  
        border=NA, col=grey.colors(100, alpha = 0.1))

HelpersMG documentation built on Sept. 12, 2024, 9:35 a.m.