Matrix (version 1.5-4)

CsparseMatrix-class: Class "CsparseMatrix" of Sparse Matrices in Column-compressed Form

Description

The "CsparseMatrix" class is the virtual class of all sparse matrices coded in sorted compressed column-oriented form. Since it is a virtual class, no objects may be created from it. See showClass("CsparseMatrix") for its subclasses.

Slots

i:

Object of class "integer" of length nnzero (number of non-zero elements). These are the 0-based row numbers for each non-zero element in the matrix, i.e., i must be in 0:(nrow(.)-1).

p:

integer vector for providing pointers, one for each column, to the initial (zero-based) index of elements in the column. .@p is of length ncol(.) + 1, with p[1] == 0 and p[length(p)] == nnzero, such that in fact, diff(.@p) are the number of non-zero elements for each column.

In other words, m@p[1:ncol(m)] contains the indices of those elements in m@x that are the first elements in the respective column of m.

Dim, Dimnames:

inherited from the superclass, see the sparseMatrix class.

Extends

Class "sparseMatrix", directly. Class "Matrix", by class "sparseMatrix".

Methods

matrix products %*%, crossprod() and tcrossprod(), several solve methods, and other matrix methods available: %% The following is generated by promptClass(..) -- %% FIXME: write a script that update all the *-class.Rd files

Arith

signature(e1 = "CsparseMatrix", e2 = "numeric"): ...

Arith

signature(e1 = "numeric", e2 = "CsparseMatrix"): ...

Math

signature(x = "CsparseMatrix"): ...

band

signature(x = "CsparseMatrix"): ...

-

signature(e1 = "CsparseMatrix", e2 = "numeric"): ...

-

signature(e1 = "numeric", e2 = "CsparseMatrix"): ...

+

signature(e1 = "CsparseMatrix", e2 = "numeric"): ...

+

signature(e1 = "numeric", e2 = "CsparseMatrix"): ...

coerce

signature(from = "CsparseMatrix", to = "TsparseMatrix"): ...

coerce

signature(from = "CsparseMatrix", to = "denseMatrix"): ...

coerce

signature(from = "CsparseMatrix", to = "matrix"): ...

coerce

signature(from = "TsparseMatrix", to = "CsparseMatrix"): ...

coerce

signature(from = "denseMatrix", to = "CsparseMatrix"): ...

diag

signature(x = "CsparseMatrix"): ...

gamma

signature(x = "CsparseMatrix"): ...

lgamma

signature(x = "CsparseMatrix"): ...

log

signature(x = "CsparseMatrix"): ...

t

signature(x = "CsparseMatrix"): ...

tril

signature(x = "CsparseMatrix"): ...

triu

signature(x = "CsparseMatrix"): ...

See Also

colSums, kronecker, and other such methods with own help pages.

Further, the super class of CsparseMatrix, sparseMatrix, and, e.g., class dgCMatrix for the links to other classes.

Examples

getClass("CsparseMatrix")

## The common validity check function (based on C code):
getValidity(getClass("CsparseMatrix"))