https://github.com/cran/Matrix
Tip revision: 098a4d94eb7dd56405dee9bb64062ea0a814389e authored by Martin Maechler on 10 September 2022, 21:02:54 UTC
version 1.5-0
version 1.5-0
Tip revision: 098a4d9
dtCMatrix.R
#### Triangular Sparse Matrices in compressed column-oriented format
## MJ: no longer needed ... replacement in ./denseMatrix.R
if(FALSE) {
setAs("matrix", "dtCMatrix",
function(from) as(as(from, "dtTMatrix"), "dtCMatrix"))
} ## MJ
## MJ: no longer needed ... replacement in ./sparseMatrix.R
if(FALSE) {
setAs("dtCMatrix", "ltCMatrix",
function(from) new("ltCMatrix", i = from@i, p = from@p,
uplo = from@uplo, diag = from@diag,
x = as.logical(from@x),
## FIXME?: use from@factors smartly
Dim = from@Dim, Dimnames = from@Dimnames))
setAs("dtCMatrix", "ntCMatrix", # just drop 'x' slot:
function(from) new("ntCMatrix", i = from@i, p = from@p,
uplo = from@uplo, diag = from@diag,
## FIXME?: use from@factors smartly
Dim = from@Dim, Dimnames = from@Dimnames))
##' dtC* |-> dgC* (provide for direct use in other coercions) :
.dtC2g <- function(from) {
if (from@diag == "U")
from <- .Call(Csparse_diagU2N, from)
## new("dgCMatrix", .....) # ---> Rather faster, no checking:
copyClass(from, "dgCMatrix",
sNames = c("i", "p", "x", "Dim", "Dimnames"), check = FALSE)
}
setAs("dtCMatrix", "dgCMatrix", .dtC2g)
setAs("dtCMatrix", "dsCMatrix", function(from) as(from, "symmetricMatrix"))
## FIXME: make more efficient
## ----- and as(., "triangularMatrix") is even worse via as_Sp()
setAs("dgCMatrix", "dtCMatrix", # to triangular, needed for triu,..
function(from) as(.Call(Csparse_to_Tsparse, from, FALSE), "dtCMatrix"))
setAs("dtCMatrix", "dgTMatrix",
function(from) {
if (from@diag == "U") from <- .Call(Csparse_diagU2N, from)
## ignore triangularity in conversion to TsparseMatrix
.Call(Csparse_to_Tsparse, from, FALSE)
})
setAs("dtCMatrix", "dgeMatrix",
function(from) as(as(from, "dgTMatrix"), "dgeMatrix"))
## These are all needed because cholmod doesn't support triangular:
## (see end of ./Csparse.R ), e.g. for triu()
setAs("dtCMatrix", "dtTMatrix",
function(from) .Call(Csparse_to_Tsparse, from, TRUE))
## {# and this is not elegant:
## x <- as(from, "dgTMatrix")
## if (from@diag == "U") { ## drop diagonal entries '1':
## i <- x@i; j <- x@j
## nonD <- i != j
## xx <- x@x[nonD] ; i <- i[nonD] ; j <- j[nonD]
## } else {
## xx <- x@x; i <- x@i; j <- x@j
## }
## new("dtTMatrix", x = xx, i = i, j = j, Dim = x@Dim,
## Dimnames = x@Dimnames, uplo = from@uplo, diag = from@diag)
## })
## Now that we support triangular matrices use the inherited method.
## setAs("dtCMatrix", "TsparseMatrix", function(from) as(from, "dtTMatrix"))
setAs("dtCMatrix", "dtrMatrix",
function(from) as(as(from, "dtTMatrix"), "dtrMatrix"))
} ## MJ