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

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Revision 1201 - (download) (as text) (annotate)
Mon Jan 23 16:04:12 2006 UTC (13 years, 7 months ago) by maechler
File size: 2351 byte(s)
Class cleanup; particularly ldense* ones
\title{Triangular Dense Logical Matrices}
  The \code{"ltrMatrix"} class is the class of triangular, dense,
  logical matrices in nonpacked storage.  The \code{"ltpMatrix"} class
  is the same except in packed storage.
    \item{\code{x}:}{Object of class \code{"logical"}. The logical
      values that constitute the matrix, stored in column-major order.}
    \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{\link{triangularMatrix-class}}.}
    \item{\code{Dim},\code{Dimnames}:}{The dimension (a length-2
      \code{"integer"}) and corresponding names (or \code{NULL}), see the
    \item{\code{factors}:}{Object of class \code{"list"}.  A named
      list of factorizations that have been computed for the matrix.}
  \code{"ltrMatrix"} extends class \code{"lgeMatrix"}, directly, whereas\cr
  \code{"ltpMatrix"} extends class \code{"ldenseMatrix"}, directly.

  Both extend Class \code{"triangularMatrix"}, directly,
  and class \code{"denseMatrix"}, \code{"lMatrix"} and others,
  \emph{in}directly, use \code{\link{showClass}("lsyMatrix")}, e.g., for
  Currently, mainly \code{\link{t}()} and coercion methods (for
  \code{\link{as}(.)}; use, e.g.,
  \code{\link{showMethods}(class="lsyMatrix")} for details.
  \code{\link{lgeMatrix-class}}, \code{\link{Matrix-class}},

if(FALSE) ## FIXME -- Fails, needs "matrix" -> "ltrMatrix" :
as(upper.tri(matrix(,4,4)), "ltrMatrix")
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