| packedMatrix-class {Matrix} | R Documentation |
Virtual Class "packedMatrix" of Packed Dense Matrices
Description
Class "packedMatrix" is the virtual class of dense
symmetric or triangular matrices in "packed" format, storing only
the choose(n+1,2) == n*(n+1)/2 elements of the upper or
lower triangle of an n-by-n matrix. It is used to
define common methods for efficient subsetting, transposing, etc.
of its proper subclasses: currently "[dln]spMatrix"
(packed symmetric), "[dln]tpMatrix" (packed triangular),
and subclasses of these, such as
"dppMatrix".
Slots
uplo:"character"; either "U", for upper triangular, and "L", for lower.Dim,Dimnames:as all
Matrixobjects.
Extends
Class "denseMatrix", directly.
Class "Matrix", by class "denseMatrix",
distance 2.
Methods
- pack
signature(x = "packedMatrix"): ...- unpack
signature(x = "packedMatrix"): ...- isSymmetric
signature(object = "packedMatrix"): ...- isTriangular
signature(object = "packedMatrix"): ...- isDiagonal
signature(object = "packedMatrix"): ...- t
signature(x = "packedMatrix"): ...- diag
signature(x = "packedMatrix"): ...- diag<-
signature(x = "packedMatrix"): ...
Author(s)
Mikael Jagan
See Also
pack and unpack; its virtual "complement"
"unpackedMatrix"; its proper subclasses
"dspMatrix", "ltpMatrix", etc.
Examples
showClass("packedMatrix")
showMethods(classes = "packedMatrix")