predict.ellipsoid          package:cluster          R Documentation

Predict Method for Ellipsoid Objects

Description:

     Compute points on the ellipsoid boundary, mostly for drawing.

Usage:

     ## S3 method for class 'ellipsoid':
     predict(object, n.out=201, ...)
     ellipsoidPoints(A, d2, loc, n=201)

Arguments:

  object: an object of class 'ellipsoid', typically from
          'ellipsoidhull()'.

 n.out,n: the number of points to create.

A, d2, loc: arguments of the auxilary 'ellipsoidPoints', see below.

     ...: passed to and from methods.

Details:

     Note 'ellipsoidPoints' is the workhorse function of the
     'predict.ellipsoid' method; the class of 'object' is not checked;
     it must solely have valid components 'loc' (length p), the p x p
     matrix 'cov' (corresponding to 'A') and 'd2' for the center, the
     shape (``covariance'') matrix and the squared average radius or
     distance.

Value:

     a numeric matrix of dimension 'n.out' times p.

See Also:

     'ellipsoidhull', also for examples.

