| dgCMatrix-class {Matrix} | R Documentation |
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. dgCMatrix is the
“standard” class for sparse numeric matrices in the
Matrix package.
Objects can be created by calls of the form new("dgCMatrix", ...) or
often more easily via Matrix(*, sparse = TRUE).
x:"numeric" - the non-zero
elements of the matrix."CsparseMatrix".
signature(from = "matrix", to = "dgCMatrix")signature(from = "dgCMatrix", to = "matrix")signature(from = "dgCMatrix", to = "dgTMatrix")signature(x = "dgCMatrix", y = "missing")
returns t(x) %*% x as an dsCMatrix object.signature(x = "dgCMatrix", y = "matrix"): ... signature(x = "dgCMatrix", y = "numeric"): ... signature(x = "dgCMatrix"): returns the diagonal
of xsignature(x = "dgCMatrix"): returns the dimensions
of xsignature(x = "dgCMatrix"): plots an image of
x using the levelplot functionsignature(x = "dgCMatrix"): computes the LU
decomposition of a square dgCMatrix object
Classes dsCMatrix,
dtCMatrix, lu
(m <- Matrix(c(0,0,2:0), 3,5)) str(m) m[,1]