ellipse {clusterfly} | R Documentation |
Randomly sample points from a probability contour of a multivariate normal
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 |
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.
Hadley Wickham <h.wickham@gmail.com>