Matrix (version 1.2-8)

dtpMatrix-class: Packed Triangular Dense Matrices - "dtpMatrix"

Description

The "dtpMatrix" class is the class of triangular, dense, numeric matrices in packed storage. The "dtrMatrix" class is the same except in nonpacked storage.

Objects from the Class

Objects can be created by calls of the form new("dtpMatrix", ...) or by coercion from other classes of matrices.

Slots

Extends

Class "ddenseMatrix", directly. Class "triangularMatrix", directly. Class "dMatrix" and more by class "ddenseMatrix" etc, see the examples.

Methods

See Also

Class dtrMatrix

Examples

showClass("dtrMatrix")

example("dtrMatrix-class", echo=FALSE)
(p1 <- as(T2, "dtpMatrix"))
str(p1)
(pp <- as(T, "dtpMatrix"))
ip1 <- solve(p1)
stopifnot(length(p1@x) == 3, length(pp@x) == 3,
          p1 @ uplo == T2 @ uplo, pp @ uplo == T @ uplo,
	  identical(t(pp), p1), identical(t(p1), pp),
	  all((l.d <- p1 - T2) == 0), is(l.d, "dtpMatrix"),
	  all((u.d <- pp - T ) == 0), is(u.d, "dtpMatrix"),
	  l.d@uplo == T2@uplo, u.d@uplo == T@uplo,
	  identical(t(ip1), solve(pp)), is(ip1, "dtpMatrix"),
	  all.equal(as(solve(p1,p1), "diagonalMatrix"), Diagonal(2)))