dgCMatrix-class {Matrix}R Documentation

Compressed, sparse, column-oriented numeric matrices

Description

The dgCMatrix class is a class of sparse numeric matrices in the compressed, sparse, column-oriented format. In this implementation the non-zero elements in the columns are sorted into increasing row order.

Objects from the Class

Objects can be created by calls of the form new("dgCMatrix", ...) or often more easily via Matrix(*, sparse = TRUE).

Slots

x:
Object of class "numeric" - the non-zero elements of the matrix.
...
all other slots are inherited from the superclass "CsparseMatrix".

Methods

coerce
signature(from = "matrix", to = "dgCMatrix")
coerce
signature(from = "dgCMatrix", to = "matrix")
coerce
signature(from = "dgCMatrix", to = "dgBCMatrix")
coerce
signature(from = "dgCMatrix", to = "dgTMatrix")
crossprod
signature(x = "dgCMatrix", y = "missing") returns t(x) %*% x as an dsCMatrix object.
crossprod
signature(x = "dgCMatrix", y = "matrix"): ...
crossprod
signature(x = "dgCMatrix", y = "numeric"): ...
diag
signature(x = "dgCMatrix"): returns the diagonal of x
dim
signature(x = "dgCMatrix"): returns the dimensions of x
image
signature(x = "dgCMatrix"): plots an image of x using the levelplot function

See Also

Classes dsCMatrix, dtCMatrix

Examples

(m <- Matrix(c(0,0,2:0), 3,5))
str(m)
m[,1]

[Package Matrix version 0.995-11 Index]