ellipse: Create multivariate ellipse. Randomly sample points from a...
In clusterfly: Explore clustering interactively using R and GGobi

There are two ways to use this function. You can either supply a data set for which a multivariate normal ellipse will be drawn or you can supply the mean vector, covariance matrix and number of dimensions yourself.

1 2	ellipse(data, npoints = 1000, cl = 0.95, mean = colMeans(data), cov = var(data), df = nrow(data))

`data`	data frame or matrix
`npoints`	number of points to sample
`cl`	proportion of density contained within ellipse
`mean`	mean vector
`cov`	variance-covariance matrix
`df`	degrees of freedom used for calculating F statistic