The "dtpMatrix" class is the class of triangular,
dense, numeric matrices in packed storage. The "dtrMatrix"
class is the same except in nonpacked storage.
Arguments
Objects from the Class
Objects can be created by calls of the form new("dtpMatrix",
...) or by coercion from other classes of matrices.
Extends
Class "ddenseMatrix", directly.
Class "triangularMatrix", directly.
Class "dMatrix" and more by class "ddenseMatrix" etc, see
the examples.