Matrix (version 0.999375-42)

triangularMatrix-class: Virtual Class of Triangular Matrices in package:Matrix

Description

The virtual class of triangular matrices,"triangularMatrix", from the package Matrix contains numeric and logical, dense and sparse matrices, e.g., see the examples.

The main use will be in methods (and C functions) that can deal with all triangular matrices.

Extends

Class "Matrix", directly.

Methods

There's a C function triangularMatrix_validity() called by the internal validity checking functions.

Currently, Schur, isSymmetric and as() (i.e. coerce) have methods with triangularMatrix in their signature.

See Also

Classes symmetricMatrix, and, e.g., dtrMatrix for numeric dense matrices, or ltCMatrix for a logical sparse matrix subclass of "triangularMatrix".

Examples

showClass("triangularMatrix")

## The names of direct subclasses:
scl <- getClass("triangularMatrix")@subclasses
directly <- sapply(lapply(scl, slot, "by"), length) == 0
names(scl)[directly]