| 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.
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", see CsparseMatrix-class.
signature(from = "matrix", to = "dgCMatrix")signature(from = "dgCMatrix", to = "matrix")signature(from = "dgCMatrix", to = "dgBCMatrix")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 function
dsCMatrix-class, dtCMatrix-class
(m <- Matrix(c(0,0,2:0), 3,5)) str(m) m[,1]