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[matrix] View of /pkg/R/dtrMatrix.R
 [matrix] / pkg / R / dtrMatrix.R

View of /pkg/R/dtrMatrix.R

Tue Aug 29 22:30:57 2006 UTC (13 years, 5 months ago) by bates
File size: 3914 byte(s)
`Promotion of %*% and solve to RHS of ddenseMatrix`
```#### Triangular Matrices -- Coercion and Methods

## or rather setIs() {since test can fail }?
setAs("dgeMatrix", "dtrMatrix",
function(from) {
## FIXME: also check for unit-diagonal: 'diag = "U"'
if(isTriangular(from, upper = TRUE))
new("dtrMatrix", x = from@x, Dim = from@Dim, uplo = "U",
Dimnames = from@Dimnames)
else if(isTriangular(from, upper = FALSE))
new("dtrMatrix", x = from@x, Dim = from@Dim, uplo = "L",
Dimnames = from@Dimnames)
else stop("not a triangular matrix")
})

setAs("dtrMatrix", "dtpMatrix",
function(from) .Call(dtrMatrix_as_dtpMatrix, from))

## needed for t() method
setAs("dtrMatrix", "matrix",
function(from) .Call(dtrMatrix_as_matrix, from))

setAs("matrix", "dtrMatrix",
function(from) as(.Call(dup_mMatrix_as_dgeMatrix, from), "dtrMatrix"))

## Group Methods:
## TODO: carefully check for the cases where the result remains triangular
## instead : inherit them from "dgeMatrix" via definition in ./dMatrix.R

## Note: Just *because* we have an explicit  dtr -> dge coercion,
##       show( <ddenseMatrix> ) is not okay, and we need our own:
setMethod("show", "dtrMatrix", function(object) prMatrix(object))

setMethod("%*%", signature(x = "dtrMatrix", y = "ddenseMatrix"),
function(x, y) .Call(dtrMatrix_matrix_mm, x, y, FALSE),
valueClass = "dgeMatrix")

setMethod("%*%", signature(x = "dtrMatrix", y = "matrix"),
function(x, y) .Call(dtrMatrix_matrix_mm, x, y, FALSE),
valueClass = "dgeMatrix")

setMethod("%*%", signature(x = "dgeMatrix", y = "dtrMatrix"),
function(x, y) .Call(dtrMatrix_matrix_mm, y, x, TRUE),
valueClass = "dgeMatrix")

setMethod("%*%", signature(x = "matrix", y = "dtrMatrix"),
function(x, y) .Call(dtrMatrix_matrix_mm, y, x, TRUE),
valueClass = "dgeMatrix")

## no longer needed
## setMethod("%*%", signature(x = "dtrMatrix", y = "dtrMatrix"),
## 	  function(x, y) callGeneric(x = x, y = as(y, "dgeMatrix")),
##           valueClass = "dgeMatrix")

setMethod("crossprod", signature(x = "dtrMatrix", y = "missing"),
function(x, y = NULL) callGeneric(x = as(x, "dgeMatrix")),
valueClass = "dpoMatrix")

setMethod("determinant", signature(x = "dtrMatrix", logarithm = "missing"),
function(x, logarithm, ...) callGeneric(x, TRUE))

setMethod("determinant", signature(x = "dtrMatrix", logarithm = "logical"),
function(x, logarithm, ...) {
dg <- diag(x)
if (logarithm) {
modulus <- sum(log(abs(dg)))
sgn <- prod(sign(dg))
} else {
modulus <- prod(dg)
sgn <- sign(modulus)
modulus <- abs(modulus)
}
attr(modulus, "logarithm") <- logarithm
val <- list(modulus = modulus, sign = sgn)
class(val) <- "det"
val
})

setMethod("norm", signature(x = "dtrMatrix", type = "character"),
function(x, type, ...)
.Call(dtrMatrix_norm, x, type),
valueClass = "numeric")

setMethod("norm", signature(x = "dtrMatrix", type = "missing"),
function(x, type, ...)
.Call(dtrMatrix_norm, x, "O"),
valueClass = "numeric")

setMethod("rcond", signature(x = "dtrMatrix", type = "character"),
function(x, type, ...)
.Call(dtrMatrix_rcond, x, type),
valueClass = "numeric")

setMethod("rcond", signature(x = "dtrMatrix", type = "missing"),
function(x, type, ...)
.Call(dtrMatrix_rcond, x, "O"),
valueClass = "numeric")

setMethod("solve", signature(a = "dtrMatrix", b="missing"),
function(a, b, ...)
.Call(dtrMatrix_solve, a),
valueClass = "dtrMatrix")

setMethod("solve", signature(a = "dtrMatrix", b="ddenseMatrix"),
function(a, b, ...)
.Call(dtrMatrix_matrix_solve, a, b),
valueClass = "dgeMatrix")

setMethod("solve", signature(a = "dtrMatrix", b="matrix"),
function(a, b, ...)
.Call(dtrMatrix_matrix_solve, a, b),
valueClass = "dgeMatrix")

setMethod("t", signature(x = "dtrMatrix"), t_trMatrix)
```