The R Project SVN R-packages

 ### Coercion and Methods for Symmetric Matrices

setAs("dspMatrix", "dsyMatrix",
      function(from) .Call(dspMatrix_as_dsyMatrix, from))

## dge <--> dsp   via  dsy
setAs("dspMatrix", "dgeMatrix",
      function(from) as(as(from, "dsyMatrix"), "dgeMatrix"))
setAs("dgeMatrix", "dspMatrix",
      function(from) as(as(from, "dsyMatrix"), "dspMatrix"))

## S3-matrix <--> dsp   via  dsy
setAs("dspMatrix", "matrix",
      function(from) as(as(from, "dsyMatrix"), "matrix"))
setAs("matrix", "dspMatrix",
      function(from) as(as(from, "dsyMatrix"), "dspMatrix"))



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

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

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

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

##setMethod("%*%", signature(x = "dspMatrix", y = "numeric"),
##          function(x, y)
##          .Call(dspMatrix_matrix_mm, x, as.matrix(y), FALSE),
##          valueClass = "dgeMatrix")

setMethod("%*%", signature(x = "dspMatrix", y = "integer"),
          function(x, y) {
              storage.mode(y) <- "double"
              .Call(dspMatrix_matrix_mm, x, as.matrix(y), FALSE)
          }, valueClass = "dgeMatrix")

setMethod("solve", signature(a = "dspMatrix", b = "missing"),
      function(a, b, ...) .Call(dspMatrix_solve, a),
      valueClass = "dspMatrix")

setMethod("solve", signature(a = "dspMatrix", b = "matrix"),
      function(a, b, ...)
      .Call(dspMatrix_matrix_solve, a, b, FALSE),
      valueClass = "dgeMatrix")

setMethod("solve", signature(a = "dspMatrix", b = "dgeMatrix"),
      function(a, b, ...)
      .Call(dspMatrix_matrix_solve, a, as(b,"matrix"), TRUE),
      valueClass = "dgeMatrix")

##setMethod("solve", signature(a = "dspMatrix", b = "numeric"),
##    function(a, b, ...)
##    .Call(dspMatrix_matrix_solve, a, as.matrix(b), FALSE),
##    valueClass = "dgeMatrix")

setMethod("solve", signature(a = "dspMatrix", b = "integer"),
      function(a, b, ...) {
          storage.mode(b) <- "double"
          .Call(dspMatrix_matrix_solve, a, as.matrix(b), FALSE)
      }, valueClass = "dgeMatrix")

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

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

setMethod("t", signature(x = "dspMatrix"),
          function(x) as(t(as(x, "dsyMatrix")), "dspMatrix"),
          valueClass = "dspMatrix")

setMethod("unpack", signature(x = "dspMatrix"),
          function(x, ...) as(x, "dsyMatrix"),
          valueClass = "dsyMatrix")

## The following allows  as(*, "dppMatrix").
## However it *requires* that dppMatrix_chol() gives an error
## for non-positive-semi-definite matrices -- which it does since 2005-10-03
## FIXME: This gives an error for singular pos.SEMI-def. matrices:
setIs("dspMatrix", "dppMatrix",
      test = function(obj)
          "try-error" != class(try(.Call(dppMatrix_chol, obj), TRUE)),
      replace = function(obj, value) {
          ## copy all slots
          for(n in slotNames(obj)) slot(obj, n) <- slot(value, n)
          obj
      })