Matrix (version 1.2-7.1)

dtrMatrix-class: Triangular, dense, numeric matrices

Description

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

Objects from the Class

Objects can be created by calls of the form new("dtrMatrix", ...).

Slots

Extends

Class "ddenseMatrix", directly. Class "triangularMatrix", directly. Class "Matrix" and others, by class "ddenseMatrix".

Methods

Among others (such as matrix products, e.g. ?crossprod-methods),

efficientely use a “forwardsolve” or backsolve for a lower or upper triangular matrix, respectively, see also solve-methods.

Objects from the Class

This class is currently still mostly unimplemented! Objects can be created by calls of the form new("dtRMatrix", ...).

Slots

Extends

Class "dgRMatrix", directly. Class "dsparseMatrix", by class "dgRMatrix". Class "dMatrix", by class "dgRMatrix". Class "sparseMatrix", by class "dgRMatrix". Class "Matrix", by class "dgRMatrix".

Methods

No methods currently with class "dsRMatrix" in the signature.

See Also

Classes ddenseMatrix, dtpMatrix, triangularMatrix

Examples

(m <- rbind(2:3, 0:-1))
(M <- as(m, "dgeMatrix"))

(T <- as(M, "dtrMatrix")) ## upper triangular is default
(T2 <- as(t(M), "dtrMatrix"))
stopifnot(T@uplo == "U", T2@uplo == "L", identical(T2, t(T)))