This is an experimental function designed to separate internal code in link{heplot3d}.
Usage
Ellipsoid(x, ...)
# S3 method for class 'data.frame'
Ellipsoid(x, which = 1:3, method = c("classical", "mve", "mcd"), ...)
# Default S3 method
Ellipsoid(
x,
center = c(0, 0, 0),
which = 1:3,
radius = 1,
df = Inf,
label = "",
cex.label = 1.5,
col = "pink",
lwd = 1,
segments = 40,
shade = TRUE,
alpha = 0.1,
wire = TRUE,
verbose = FALSE,
warn.rank = FALSE,
...
)Arguments
- x
An object. In the default method the parameter x should be a square positive definite matrix at least 3x3 in size. It will be treated as the correlation or covariance of a multivariate normal distribution. For the
data.framemethod, it should be a numeric data frame with at least 3 columns.- ...
Other arguments
- which
This parameter selects which variables from the object will be plotted. The default is the first 3.
- method
the covariance method to be used: classical product-moment (
"classical"), or minimum volume ellipsoid ("mve"), or minimum covariance determinant ("mcd"- center
center of the ellipsoid, a vector of length 3, typically the mean vector of data
- radius
size of the ellipsoid
- df
degrees of freedom associated with the covariance matrix, used to calculate the appropriate F statistic
- label
label for the ellipsoid
- cex.label
text size of label
- col
color of the ellipsoid
- lwd
line with for the wire-frame version
- segments
number of segments composing each ellipsoid; defaults to
40.- shade
logical; should the ellipsoid be smoothly shaded?
- alpha
transparency of the shaded ellipsoid
- wire
logical; should the ellipsoid be drawn as a wire frame?
- verbose
logical; for debugging
- warn.rank
logical; warn if the ellipsoid is less than rank 3?