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#### Nonzero Pattern Sparse Matrices in triplet format
### contains = "nsparseMatrix"
### ============= ---> superclass methods in ./nsparseMatrix.R
setAs("ngTMatrix", "lgeMatrix",
function(from) .Call(lgTMatrix_to_lgeMatrix, as(from,"lgTMatrix")))
setAs("ngTMatrix", "ngeMatrix",
function(from) as(as(from, "lgeMatrix"), "nMatrix"))
setAs("ngTMatrix", "generalMatrix", function(from) as(from, "ngeMatrix"))
setAs("ngTMatrix", "matrix",
function(from) .Call(lgTMatrix_to_matrix, as(from, "lgTMatrix")))
## setAs("ngTMatrix", "matrix", # go via fast C code:
## function(from) as(as(from, "ngCMatrix"), "matrix"))
setAs("matrix", "ngTMatrix",
function(from) {
if(!is.logical(from))
storage.mode(from) <- "logical"
if(anyNA(from))
stop("cannot coerce 'NA's to \"nsparseMatrix\"")
dn <- dimnames(from)
if(is.null.DN(dn))
dn <- list(NULL,NULL)
else dimnames(from) <- NULL # such that which(.) does not see any:
ij <- which(from, arr.ind = TRUE, useNames = FALSE) - 1L
if(length(ij) == 0) ij <- matrix(ij, 0, 2)
new("ngTMatrix",
i = ij[,1],
j = ij[,2],
Dim = as.integer(dim(from)),
Dimnames = dn)
})
setAs("matrix", "nMatrix", function(from) as(from, "ngTMatrix"))
setAs("ngTMatrix", "dgTMatrix",
function(from)
## more efficient than
## as(as(as(sM, "ngCMatrix"), "dgCMatrix"), "dgTMatrix")
new("dgTMatrix", i = from@i, j = from@j,
x = rep.int(1, length(from@i)),
## cannot copy factors, but can we use them?
Dim = from@Dim, Dimnames= from@Dimnames))
setAs("ngTMatrix", "dMatrix", function(from) as(from, "dgTMatrix"))
setAs("ngTMatrix", "dsparseMatrix", function(from) as(from, "dgTMatrix"))
setAs("ngTMatrix", "lgTMatrix",
function(from)
new("lgTMatrix", i = from@i, j = from@j,
x = rep.int(TRUE, length(from@i)),
## cannot copy factors, but can we use them?
Dim = from@Dim, Dimnames= from@Dimnames))
setAs("ngTMatrix", "lMatrix", function(from) as(from, "lgTMatrix"))
setAs("ngTMatrix", "triangularMatrix",
function(from) check.gT2tT(from, toClass = "ntTMatrix", do.n=TRUE))
setAs("ngTMatrix", "ntTMatrix",
function(from) check.gT2tT(from, toClass = "ntTMatrix", do.n=TRUE))
setAs("ngTMatrix", "symmetricMatrix",
function(from) check.gT2sT(from, toClass = "nsTMatrix", do.n=TRUE))
## We favor coercion to super-classes, here, "symmetricMatrix"
## setAs("ngTMatrix", "nsTMatrix",
## function(from) check.gT2sT(from, toClass = "nsTMatrix", do.n=TRUE))
if(FALSE) ## unneeded: use t.<TsparseMatrix>
setMethod("t", signature(x = "ngTMatrix"),
function(x) new("ngTMatrix", i = x@j, j = x@i,
Dim = x@Dim[2:1],
Dimnames= x@Dimnames[2:1]),
valueClass = "ngTMatrix")
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