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View of /pkg/man/dtrMatrix-class.Rd

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Revision 1463 - (download) (as text) (annotate)
Tue Aug 29 22:30:57 2006 UTC (13 years, 7 months ago) by bates
File size: 3459 byte(s)
Promotion of %*% and solve to RHS of ddenseMatrix
\alias{coerce,dgeMatrix,dtrMatrix-method}% or rather setIs?
\title{Triangular, dense, numeric matrices}
  The \code{"dtrMatrix"} class is the class of triangular, dense,
  numeric matrices in nonpacked storage.  The \code{"dtpMatrix"} class
  is the same except in packed storage.
\section{Objects from the Class}{
  Objects can be created by calls of the form \code{new("dtrMatrix", ...)}.
    \item{\code{uplo}:}{Object of class \code{"character"}. Must be
      either "U", for upper triangular, and "L", for lower triangular.}
    \item{\code{diag}:}{Object of class \code{"character"}. Must be
      either \code{"U"}, for unit triangular (diagonal is all ones), or
      \code{"N"}; see \code{\linkS4class{triangularMatrix}}.}
    \item{\code{x}:}{Object of class \code{"numeric"}. The numeric
      values that constitute the matrix, stored in column-major order.}
    \item{\code{Dim}:}{Object of class \code{"integer"}. The dimensions
      of the matrix which must be a two-element vector of non-negative
  Class \code{"ddenseMatrix"}, directly.
  Class \code{"triangularMatrix"}, directly.
  Class \code{"Matrix"} and others, by class \code{"ddenseMatrix"}.
    \item{\%*\%}{\code{signature(x = "dtrMatrix", y = "matrix")} and other
      signatures (use \code{showMethods("\%*\%", class="dtrMatrix")}):
      matrix multiplication.}
    \item{coerce}{\code{signature(from = "dgeMatrix", to = "dtrMatrix")}}
    \item{coerce}{\code{signature(from = "dtrMatrix", to = "matrix")}}
    \item{coerce}{\code{signature(from = "dtrMatrix", to = "ltrMatrix")}}
    \item{coerce}{\code{signature(from = "dtrMatrix", to = "matrix")}}
    \item{coerce}{\code{signature(from = "matrix",    to = "dtrMatrix")}}

    \item{norm}{\code{signature(x = "dtrMatrix", type = "character")}}
    \item{rcond}{\code{signature(x = "dtrMatrix", type = "character")}}
    \item{solve}{\code{signature(a = "dtrMatrix", b = "missing")}}
    \item{solve}{\code{signature(a = "dtrMatrix", b = "matrix")}}
  Classes \code{\linkS4class{ddenseMatrix}}, \code{\linkS4class{dtpMatrix}},
\examples{%% this is used from ./dtpMatrix-class.Rd (change with care!)
(m <- rbind(2:3, 0:-1))
(M <- as(m, "dgeMatrix"))

(T <- as(M, "dtrMatrix")) ## upper triangular is default
(T2 <- as(t(M), "dtrMatrix"))
stopifnot(T@uplo == "U", T2@uplo == "L", identical(T2, t(T)))
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