sparseMatrix-class {Matrix}R Documentation

Virtual Class "sparseMatrix" — Mother of Sparse Matrices

Description

Virtual Mother Class of All Sparse Matrices

Slots

Dim:
Object of class "integer" - the dimensions of the matrix - must be an integer vector with exactly two non-negative values.
Dimnames:
a list of length two - inherited from class Matrix, see Matrix.
factors:
Object of class "list" - a list of factorizations of the matrix.

Extends

Class "Matrix", directly.

Methods

show
signature(object = "sparseMatrix"): The show method for sparse matrices prints “structural” zeroes as "." or blank.

Note

In method selection for multiplication operations (i.e. %*% and the two-argument form of crossprod) the sparseMatrix class takes precedence in the sense that if one operand is a sparse matrix and the other is any type of dense matrix then the dense matrix is coerced to a dgeMatrix and the appropriate sparse matrix method is used.

Examples

showClass("sparseMatrix") ## and look at the help() of its subclasses

[Package Matrix version 0.9975-6 Index]