https://github.com/cran/Matrix
Tip revision: eb1f7fce82afee7a58cbc169eba0d67fbe3540ad authored by Doug and Martin on 12 January 2008, 00:00:00 UTC
version 0.999375-4
version 0.999375-4
Tip revision: eb1f7fc
lgCMatrix.R
#### Logical Sparse Matrices in Compressed column-oriented format
### contains = "lsparseMatrix"
## Can use CsparseMatrix methods for all of these
## setMethod("%*%", signature(x = "lgCMatrix", y = "lgCMatrix"),
## function(x, y)
## .Call(lgCMatrix_lgCMatrix_mm, x, y),
## valueClass = "lgCMatrix")
## setMethod("t", signature(x = "lgCMatrix"),
## function(x) .Call(lgCMatrix_trans, x),
## valueClass = "lgCMatrix")
## setMethod("diag", signature(x = "lgCMatrix"),
## function(x, nrow, ncol) .Call(lgCMatrix_diag, x))
## setMethod("crossprod", signature(x = "lgCMatrix", y = "missing"),
## function(x, y = NULL)
## .Call(lgCMatrix_crossprod, x, TRUE, NULL),
## valueClass = "lsCMatrix")
## setMethod("tcrossprod", signature(x = "lgCMatrix", y = "missing"),
## function(x, y = NULL)
## .Call(lgCMatrix_crossprod, x, FALSE, NULL),
## valueClass = "lsCMatrix")
setAs("lgCMatrix", "dgCMatrix",
function(from) new("dgCMatrix", i = from@i, p = from@p,
x = as.double(from@x),
Dim = from@Dim, Dimnames = from@Dimnames))
setAs("lgCMatrix", "lgTMatrix",
function(from) new("lgTMatrix", i = from@i, x = from@x,
j = .Call(Matrix_expand_pointers, from@p),
Dim = from@Dim, Dimnames = from@Dimnames))
setAs("lgCMatrix", "lgeMatrix",
function(from)
new("lgeMatrix", x = c(as(from, "matrix")), # is fast,
Dim = from@Dim, Dimnames = from@Dimnames))
setAs("lgCMatrix", "matrix",
function(from) .Call(lcsc_to_matrix, from))
## not this: .Call(Csparse_to_matrix, from)), since it goes via dense -> double precision
## TODO (maybe): write matrix_to_lcsc() in ../src/lgCMatrix.c
setAs("matrix", "lgCMatrix",
function(from) as(as(from, "lgTMatrix"), "lgCMatrix"))
setMethod("image", "lgCMatrix",
function(x, ...) {
x <- as(as(x, "dgCMatrix"), "dgTMatrix")
callGeneric()
})