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revision 481, Wed Feb 2 15:01:50 2005 UTC revision 636, Tue Mar 15 00:40:58 2005 UTC
# Line 2  Line 2 
2  \docType{class}  \docType{class}
3  \alias{\%*\%,dgeMatrix,dsyMatrix-method}  \alias{\%*\%,dgeMatrix,dsyMatrix-method}
4  \alias{\%*\%,dsyMatrix,dgeMatrix-method}  \alias{\%*\%,dsyMatrix,dgeMatrix-method}
5    \alias{\%*\%,dspMatrix,dgeMatrix-method}
6    \alias{\%*\%,dspMatrix,matrix-method}
7  \alias{dsyMatrix-class}  \alias{dsyMatrix-class}
8    \alias{dspMatrix-class}
9  \alias{coerce,dsyMatrix,dgeMatrix-method}  \alias{coerce,dsyMatrix,dgeMatrix-method}
10    \alias{coerce,dspMatrix,dgeMatrix-method}
11    \alias{coerce,dspMatrix,dsyMatrix-method}
12  \alias{coerce,dsyMatrix,matrix-method}  \alias{coerce,dsyMatrix,matrix-method}
13    \alias{coerce,dspMatrix,matrix-method}
14    \alias{chol,dsyMatrix,ANY-method}
15    \alias{norm,dspMatrix,character-method}
16  \alias{norm,dsyMatrix,character-method}  \alias{norm,dsyMatrix,character-method}
17  \alias{norm,dsyMatrix,missing-method}  \alias{norm,dsyMatrix,missing-method}
18    \alias{norm,dspMatrix,missing-method}
19  \alias{t,dsyMatrix-method}  \alias{t,dsyMatrix-method}
20  \title{Class "dsyMatrix" of symmetric matrices}  \alias{t,dspMatrix-method}
21  \description{The \code{"dsyMatrix"} class is the class of symmetric  \alias{rcond,dspMatrix,missing-method}
22    matrices in non-packed storage.  Only the upper triangle or the lower  \alias{rcond,dsyMatrix,missing-method}
23    \alias{rcond,dspMatrix,character-method}
24    \alias{rcond,dsyMatrix,character-method}
25    \alias{solve,dspMatrix,missing-method}
26    \alias{solve,dsyMatrix,missing-method}
27    \alias{solve,dspMatrix,dgeMatrix-method}
28    \alias{solve,dsyMatrix,dgeMatrix-method}
29    \alias{solve,dspMatrix,matrix-method}
30    \alias{solve,dsyMatrix,matrix-method}
31    \alias{unpack,dspMatrix-method}
32    \title{Symmetric, dense matrices}
33    \description{The \code{"dsyMatrix"} class is the class of symmetric, dense
34      matrices in non-packed storage and \code{"dsyMatrix"} is the class of
35      symmetric dense matrices in packed storage.  Only the upper triangle or the lower
36    triangle is stored.}    triangle is stored.}
37  \section{Objects from the Class}{  \section{Objects from the Class}{
38  Objects can be created by calls of the form \code{new("dsyMatrix", ...)}.  Objects can be created by calls of the form \code{new("dsyMatrix", ...)}.
# Line 24  Line 46 
46      \item{\code{Dim}:}{Object of class \code{"integer"}. The dimensions      \item{\code{Dim}:}{Object of class \code{"integer"}. The dimensions
47        of the matrix which must be a two-element vector of non-negative        of the matrix which must be a two-element vector of non-negative
48        integers.}        integers.}
     \item{\code{norm}:}{Object of class \code{"numeric"}. A named  
       numeric vector of norms of the matrix.  Some possible components  
       are \code{"O"}, the one norm; \code{"I"}, the infinity norm;  
       \code{"F"}, the Frobenius norm; and \code{"M"}, the maximum  
       absolute value.}  
49      \item{\code{rcond}:}{Object of class \code{"numeric"}. A named      \item{\code{rcond}:}{Object of class \code{"numeric"}. A named
50        numeric vector of reciprocal condition numbers in either the        numeric vector of reciprocal condition numbers in either the
51        1-norm \code{"O"} or the infinity norm \code{"I"}.}        1-norm \code{"O"} or the infinity norm \code{"I"}.}
# Line 44  Line 61 
61    \describe{    \describe{
62      \item{coerce}{\code{signature(from = "dsyMatrix", to = "dgeMatrix")}}      \item{coerce}{\code{signature(from = "dsyMatrix", to = "dgeMatrix")}}
63      \item{coerce}{\code{signature(from = "dsyMatrix", to = "matrix")}}      \item{coerce}{\code{signature(from = "dsyMatrix", to = "matrix")}}
64        \item{chol}{\code{signature(x = "dsyMatrix")}: works via coercion to
65          positive definite matrix, see \code{\link{dpoMatrix-class}}.}
66      \item{norm}{\code{signature(x = "dsyMatrix", type = "character")}}      \item{norm}{\code{signature(x = "dsyMatrix", type = "character")}}
67    }    }
68  }  }
# Line 52  Line 71 
71  \seealso{  \seealso{
72    \code{\link{dgeMatrix-class}}, \code{\link{Matrix-class}}    \code{\link{dgeMatrix-class}}, \code{\link{Matrix-class}}
73  }  }
74  %\examples{}  \examples{
75    ## Only upper triangular part matters (when uplo == "U" as per default)
76    (sy2 <- new("dsyMatrix", Dim = as.integer(c(2,2)), x = c(14, NA,32,77)))
77    (c2 <- chol(sy2))
78    str(c2)
79    
80    ## An example where chol() can't work
81    (sy3 <- new("dsyMatrix", Dim = as.integer(c(2,2)), x = c(14, -1, 2, -7)))
82    validObject(as(sy3, "dpoMatrix"), test=TRUE) # >> is not pos.def.
83    try(chol(sy3)) ## Error: not pos.def
84    }
85  \keyword{classes}  \keyword{classes}

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