confEllipse: Plot confidence ellipse based on two-dimenstional data

In bedapub/ribiosPlot: Plotting module of ribios for visualization

Plot confidence ellipse based on two-dimenstional data

Description

Plot confidence ellipse based on two-dimenstional data

Usage

confEllipse(x, y = NULL, conf = 0.95, ...)

Arguments

x	either a matrix of two columns, or a numeric vector
y	either a numeric vector of the same length as x, or NULL
conf	Confidence interval of the ellipse
...	Parameters passed to ellipse

Value

Invisible coordinates of points on the ellipse

Examples

if(interactive()) {
  testX <- rnorm(100, mean=1, sd=2)
  testY <- rnorm(100, mean=2, sd=3)
  plot(testX, testY, pch=16, xlim=c(-5,7), ylim=c(-7,11))
  confEllipse(testX, testY, col="red", lwd=1)
  confEllipse(testX, testY, conf=0.99, col="red", lwd=2)
  confEllipse(testX, testY, conf=0.9, col="red", lwd=0.5)
}

if(interactive() & require("MASS")) {
  testMVR <- mvrnorm(n=100, mu=c(2,3), Sigma=matrix(c(1, 0.65, 0.65, 1), nrow=2))
  plot(testMVR, pch=16, xlim=c(-2,6), ylim=c(0,6))
  confEllipse(testMVR, col="orange")
  confEllipse(testMVR, conf=0.99, col="red")
  confEllipse(testMVR, conf=0.9, col="lightblue")
}

bedapub/ribiosPlot documentation built on Sept. 1, 2023, 6:50 p.m.